Via kottke, an argument against children’s menus in restaurants:

Nicola Marzovilla runs a business, so when a client at his Gramercy Park restaurant, I Trulli, asks for a children’s menu, he does not say what he really thinks. What he says is, “I’m sure we can find something on the menu your child will like.” What he thinks is, “Children’s menus are the death of civilization.”

I would guess that many parents would appreciate the removal of the child’s menus even if they aren’t worried about its implications for the fate of civilization.  At home the kids know what’s in the pantry and if one of the parents is not prepared to make the children starve, they quickly learn to gag and choke on the fava beans to get to the mac-n-cheese (organic!)

If the restaurant has no children’s menu then this strategy is cut from the feasible set.  The parents are effectively committed to make the child starve if she tries it.  With that commitment in place, the child’s best response is to find something on the menu she will like and eat it.

Yesterday’s ruling came out of an appeal on a narrow case brought by American Needle, Inc. who complained about exclusive licensing of apparel/logos to Reebok.  The league formed a single entity which centralized licensing for all teams.  The Supreme Court ruled that this constituted concerted action by separate profit-maximizing entities and therefore falls under the purview of Section 1 of Sherman Act.

Here are the main points from the decision, which is an interesting read.

  1. The ruling suggests a broader scope than just licensing.  The court notes that teams compete with one another not for just apparel sales but for gate receipts, to attract fans and managerial and player personnel.
  2. Rule of reason is suggested for determining which cooperative activities are permissible and which are not.
  3. For consideration of any activity, whether or not the teams should be considered competitors will be based not on legalistic distinctions like whatever contracts are in place.  Instead the judgment is made on the basis of “a functional consideration of how they actually operate.”

Its easy to interpret these as opening the door to challenges to the systems of collective bargaining in place in all professional sports leagues.

If You Give Love a Bad Name and adore Bon Jovi, you can pay for Coming up Close.  Love Hurts: It’ll cost you to $1750 for a front-row seat, a seat that you can literally take home.  People may say you’re crazy, but you’re not the only one:

“It’s probably the biggest negotiation in any tour deal,” said Randy Phillips, the chief executive of AEG Live, promoter of the Bon Jovi tour. “On a hot act you can make as much money from 10 percent of the house as the other 90.”

Some fans will say “You Broke My Heart in Seventeen Places“:

“The artists are just gouging their fan base,” said Terrell Lowe, 49, a brewery sales executive and an avid concertgoer in San Francisco. “The majority of people just can’t afford that.”

Bruce Springsteen doesn’t want fans like Lowe to be left Dancing in the Dark so his tour last year had a maximum ticket price of $98. Is Bruce doing right by his blue collar fans by setting this maximum price?

This is a classic question in monopoly pricing, comparing a price which averages over many types of consumers (a “uniform” price) with price-discrimination.  Let’s just look at the welfare of the fans and keep Bruce’s profits out of the calculation – his wealth and his preferences over pricing suggest he’s  happy as long as the tour makes more than some lower bound.  So consider a move from uniform or near uniform pricing to price discrimination.  Some people who were paying $98 before and getting good seats won’t be able to get them for that little any more.  If they pay more for roughly the same seat or buy cheaper seats as they can’t afford the high prices, they will be worse off.

But there is another effect.  The $98 price is paid by high willingness-to-pay (WTP) and medium-willingness-to-pay consumers.  If you the price little lower, you may sell more but you’ll lose margin on the high WTP consumers.  So, you keep the price high. With price discrimination, you can charge different prices to the two groups, a high price for the high WTP and a medium price for medium WTP.  You can cut the price for medium WTP without hurting your margin on the high WTP as they are buying a different class of seat. (Caveat: you have to set up your pricing/seat quality ratios cleverly to minimize switching between classes!) So, some medium WTP consumers will be better off.  They are happy getting slightly worse seats for a lower price.

In fact, this argument applies for all consumers classes that are now pooled at the compressed pricing scheme.  If you can fine-tune pricing and target it, some consumers will lose but some will gain.  The ones who gain will be price-sensitive so it pays to cut prices to get volume.   And price-sensitive consumers are more likely to be low income, precisely the consumers the Boss wants to subsidize.

So, Bruce, do some V.I.P. pricing and give me some free tickets for advising you how to help your neediest fans.

As my wife will tell you, I hate clutter.  Stuff that’s lying around I either put to use or throw away.  Stray thoughts get the treatment today.

  1. Have the wasps in my neighborhood learned that the smell of citronella is actually a surefire signal that there’s something good nearby?
  2. I thank mother Earth for her two hemispheres as I enjoy this persimmon from Chile.
  3. Can the drunks’ favorite poker game, Indian, be solved like the dirty faces or other those common-knowledge puzzles?
  4. Classical field theory is doing physics by revealed preference.
  5. The reason it is so boring watching the Williams’ sisters in a grand slam final is that you either like both or hate both.  Either way there’s nothing to root for.
  6. Is it pure coincidence that the Risk, Uncertainty and Decision Conference is on the exact same day as the Behavioral Economics Summer School two years in a row?
  7. Johnny Rotten is the perfection of Bob Dylan’s vocal style.
  8. How well do prediction markets forecast American Idol winners? Completely decentralized information, short time-horizon, shouldn’t this be an ideal test case?

I blogged about this before and in honor of the start of the French Open I gave it some thought again and here are two ideas.

Deuce.  Each game is a race to 4 points.  (And if you are British 4 = 50.) But you have to win by 2.  Conditional on reaching a 3-3 game, the deuce scoring system helps the stronger player by comparison to a flat race to 4.  In fact, if being a stronger player means you have a higher probability of winning each point then any scoring system in which you have to win by n is better for the stonger player than the system where you only have to win by n-1.

You can think about a random walk, starting at zero (deuce) with a larger probability of moving up than down, and consider the event that it reaches n or -n.  The relative likelihood of hitting n before -n is increasing in n.

This is confounded by the fact that the server has an advantage even if he is the weaker player.  But it will average out across service-games.

Grouping scoring into games and sets.  Suppose that being a stronger player means that you are better at winning the crucial points.  Then grouped scoring makes it clear which are the crucial points.  To take an extreme example, suppose that the stronger player has one freebie:  in any match he can pick one point and win that point for sure.

In a flat (ungrouped) scoring system, all points are equal and it doesn’t matter where you spend the freebie.  And it doesn’t change your chance of winning by very much.  But in grouped scoring you can use your freebie at game- or set-point.  And this has a big impact on your winning probability.

Conjecture:  freebies will be optimally used when you are game- or set-point down, not when it is set-point in your favor.  My reasoning is that if you save your freebie when you have set-point, you will still win the set with high probability (especially because of deuce.)  If you switch to using it when you are set-point down, its going to make a difference in the cases when there is a reversal.  Since you are the stronger player and you win each point with higher probability, the reversals in your favor have higher probability.

Any thoughts on the conjecture?  It should have implications for data.  The stronger players do better when they are ad-down then when they have the ad. And across matches, their superiority over weaker players is exaggerated in the ad-down points.

My French Open forecast:  This could be the year when we have a really interesting Federer-Nadal final.

On the way from Brookline to Central Square in Cambridge to go to Toscanini’s, we turned on Hampton St to avoid roadwork and found the Myerson Tooth Corporation:

Next door is the Good News Garage owned by Click and Clack of NPR fame.

Rand Paul, referring to criticism of BP’s handling of the oil spill says

“What I don’t like from the president’s administration is this sort of, ‘I’ll put my boot heel on the throat of BP,'” Paul said in an interview withABC’s “Good Morning America.” “I think that sounds really un-American in his criticism of business.”

“And I think it’s part of this sort of blame-game society in the sense that it’s always got to be somebody’s fault instead of the fact that maybe sometimes accidents happen,” Paul said.

This is symptomatic of the perennial time-inconsistency problem that comes with incentives for good behavior.  The incentives are structured so that when bad outcomes occur, BP will be punished.  If the incentive scheme works then BP acts in good faith and then it is true that bad outcomes are just accidents. The problem is that when the accidents happen it is true that BP was acting in good faith and so they don’t deserve punishment.  And if doling out the punishment requires political will then the political will is not there.  After all, who is going to stand up and demand that BP be punished for an accident?

This is the unraveling of incentives.  Because the incentive worked only because BP expected to get punished whether or not it was an accident. To prevent this, it is the politician’s job to stir up outrage, justified or not, in order to reignite the political will to dole out the punishment.  The blame game is a valuable social convention whether or not you believe there is someone to blame.

1. Is David Cameron posher than Nick Clegg?  Choice quote:

“David Cameron is Eton-Oxford-country- clubby-cutglass-shooting party sort of posh, whereas Nick Clegg is Westminster-Cambridge- metropolitan-foreign-glottalstop-trustfund sort of posh. Cameron is upper-upper-middle class with a dash of English gentry, but Clegg is middle-upper-middle class with a hint of European aristocracy.”

2. What does the future hold for your lying toddler?

3. What do Buzz Aldrin and Leon Panetta have in common?

4. Brookline-Palestine beer connection.

  1. Pat Metheney eviscerates Kenny G.
  2. The munchies as performance enhancement.
  3. How many farts does it take to achieve liftoff?
  4. What Ghandi would say about standards wars.
  5. Pot glut in California.
  6. CGI recreation of The Shining elevator of blood.

Answer:  only if it’s good economic theory.

Any theory, not just economics has this structure: I assume A, I conclude C. It’s a good theory only if A logically implies C. And if A implies C then assuming A entails assuming C. Observations:

  1. If someone is not assuming their conclusion then you should ask them to come up with a better theory.
  2. Assuming your conclusions is a necessary condition for a good theory.  It is not sufficient:  it is possible (typical?) to assume your conclusion but have a bad theory.
  3. Once we have established that C follows from A, we can do the real work of evaluating a theory:  assessing whether we believe A.
  4. That is the beauty of economic theory and other parts of the social sciences where we assume our conclusions:  you get to see exactly what to focus on in trying to evaluate the theory.  A theorist’s job is to take an argument and decompose it into two parts: the rules of logic and the assumptions.  You can save your time not trying to evaluate the first part because you know in advance how logic works.  We put in the hard work of separating that out so that you can see what’s left to argue about.
  5. There is no point in trying to figure out if someone has “predetermined their conclusion and picked assumptions that imply it.” The timing of how the theory came into existence is irrelevant.  If it is a good theory and the theorist assumed his conclusion then you get to see exactly what assumptions led him to it.  You get to decide whether you agree with C by deciding whether you accept A. And you are given a roadmap for how to convince the theorist he is wrong.
  6. In fact, given that we all have predetermined conclusions I would rather argue with someone who makes up a set of assumptions that imply his predetermined conclusion than someone who doesn’t.  The first is doing the honorable thing of setting out conditions under which he can be proven wrong.  There is no way to get started debating with the second person.

Sandeep and I are very close to finishing a first draft of our paper on torture.  As I was working on it today, I came up with a simple three-paragraph summary of the model and some results.  Here it is.

A number of strategic considerations play a central role in shaping the equilibrium. First, the rate at which the agent can be induced to reveal information is limited by the severity of the threat.  If the principal demands too much information in a given period then the agent will prefer to resist and succumb to torture. Second, as soon as the victim reveals that he is informed by yielding to the principal’s demand, he will subsequently be forced to reveal the maximum given the amount of time remaining.  This makes it costly for the victim to concede and makes the alternative of resisting torture more attractive. Thus, in order for the victim to be willing to concede the principal must also torture a resistant suspect, in particular an uninformed suspect, until the very end.  Finally, in order to maintain principal’s incentive to continue torturing a resistant victim  the informed victim must, with positive probability, wait any number of periods before making his first concession.

These features combine to give a sharp characterization of the value of torture and the way in which it unfolds.  Because concessions are gradual and torture cannot stop once it begins, the principal waits until very close to the terminal date before even beginning to torture. Starting much earlier would require torturing an uninformed victim for many periods in return for only a small increase in the amount of information extracted from the informed.  In fact we show that the principal  starts to torture only after the game has reached the ticking time-bomb phase: the point in time after which the deadline becomes a binding constraint on the amount of information the victim can be induced to reveal. This limit on the duration of torture also limits the value of torture for the principal.

Because the principal must be willing to torture in every period, the informed victim concession probability in any given period is bounded, and this also bounds the principal’s payoff.  In fact we obtain a strict upper bound on the principal’s equilibrium payoff by considering an alternative problem in which the victim’s concession probability is maximal subject to this incentive constraint. This bound turns out to be useful for a number of results.   For example the bound enables us to derive an upper bound on the number of periods of torture that is independent of the total amount of information available.  We use this result to show that the value of torture shrinks to zero when the period length, i.e. the time interval between torture decisions, shortens.  In addition it implies that laws preventing indefinite detention of terrorist suspects entail no compromise in terms of the value of information that could be extracted in the intervening time.

Your Chair emails the entire Department.  She is desperate because no-one has signed up to attend a boring but important weekend event.  If you decide you can suffer the complaints of your spouse and children for bailing on them on a Saturday, should you hit “reply” or “reply all” on your response to the Chair?

A preliminary analysis indicates that “reply all” is the best option.  First, you signal to the Department what a great public good provider you are, embellishing your image (and self-image?) as the Mahatma Gandhi-esque figure in the Department.  People will look up to you and treat you with respect.  Second, maybe you can guilt others into attending the event.  You have made a sacrifice after all and maybe they will feel compelled to as well.  So, all in all, “reply all” is looking pretty good as an optimal strategy.

But wait – you are signaling on multiple dimensions using one signal.  “Reply all” signals you have gone through the rather than vulgar and manipulative analysis in the previous paragraph.  A truly altruistic person would have signed up already without all the hot air you are blowing out of your email account.  So, you’re probably not altruistic.  In fact, you might be devious b’stard hoping to get out of serious public good provision in the future by investing one afternoon of work now.  If people make this inference, hitting “reply all” is a mistake.

With all this agonizing, research is not getting done and the web is not getting surfed.  Just randomize your choice whatever email arrives.  Sometimes you’ll look good, sometimes not so good but people will be confused – maybe you are an altruistic after all as altruists do not email strategically.  Then, you can cash in your reputation on a serious decision when it really matters not waste it on a trivial one.

(Hat Tip:  Loosely based on Stephen Morris’s paper on Political Correctness)

He is the author who wrote this on his website:

Q. How can I get Neil Gaiman to make an appearance at my school/convention/event?
A. Contact Lisa Bransdorf at the Greater Talent Network. Tell her you want Neil to appear somewhere. Have her tell you how much it costs. Have her say it again in case you misheard it the first time. Tell her you could get Bill Clinton for that money. Have her tell you that you couldn’t even get ten minutes of Bill Clinton for that money but it’s true, he’s not cheap.

On the other hand, I’m really busy, and I ought to be writing, so pricing appearances somewhere between ridiculously high and obscenely high helps to discourage most of the people who want me to come and talk to them.

He’s busy, for sure.  Too busy to agree to every appearance request.  And so he does need to discourage people who want him to come and talk to them.  But does he have to use high prices to discourage them?  He could always just decide how many appearances he is able to fit into his busy schedule and agree to that many, saying no to everybody else.  No need for prices if he is just rationing his time.

But maybe he wants to make sure that his scarce time is allocated to the audiences that value it the most. That’s not greed, that’s efficiency.  Then instead of rationing by saying no, he should hold an auction.  He chooses the same number of appearances as in the rationing mechanism (just based on the cost of his time), but now those appearances go to the highest bidders.

But maybe his optimal quantity of appearances cannot be determined independently of demand.  If the auction fetches a very high price then he knows that the marginal willingness to pay is much higher than his marginal opportunity cost and he should increase supply.  As a result his marginal opportunity cost increases until it rises above willingness to pay and he stops there.  Now he is even more busy.  But that’s efficient.  And the price is lower.

But opportunity cost is a slippery concept.  Agreeing to additional appearances means lower prices.  The lower price is therefore an opportunity cost of the marginal appearance.  When Neil Gaiman takes this into account, equating his marginal opportunity costs to marginal willingness to pay means raising prices.  Now that’s greedy.  But on the other hand any way of increasing consumer surplus necessarily lowers Neil Gaiman’s profits, so its also (Pareto) efficient.

If doctors were to fine tune their prescriptions to take maximal advantage of the placebo effect, what would they do?  It’s hard to answer this question even with existing data on the strength of the placebo effect because beliefs, presumably the key to the placebo effect, would adjust if placebo prescription were widespread.

Indeed, over the weekend I saw a paper presented by Emir Kamenica which strongly suggests that equilibrium beliefs matter for placebos.  In an experiment on the effectiveness of anti-histamines, some subjects were shown drug ads at the same time they took the drug.  The ads had an impact on the effectiveness of the drug but only for subjects with less prior experience with the same drug.  The suggestion is that those with prior experience have already reached their equilibrium placebo effect.  (It appears that the paper is not yet available for download.)

So we need a model of the placebo effect in equilibrium.  Suppose that patients get a placebo a fraction p of the time and a full dose the remaining 1-p fraction of the time.  And let q(p) be the patient’s belief in the probability the prescription will work.  Then the placebo effect means that the true probability that the prescription will work is determined by a function h which takes two arguments:  the true dosage (=1 for full dose, 0 for placebo) and the belief q.  And in equilibrium beliefs are correct:

q = p \cdot h(q, 0) + (1-p) \cdot h(q,1) \equiv \hat h(q,p)

This equilibrium condition implicitly defines a function q(p) which gives the equilibrium efficacy as a function of the placebo rate p.

The benefit of the model is that it allows us to notice something that may not have been obvious before.  If instead of using placebos by varying p, an alternative is to just lower the dose, deterministically.  Then if we let d be the dosage (somewhere between 0 and 1), we get

q = h(q,d)

as the equilibrium condition which defines effectiveness q(d) now as a function of the fixed dose d.

The something to notice is that, if the function h is continuous and monotone, then the range of q is the same whether we use placebos p or deterministic doses d.  That is, any outcome that can be implemented with placebos can be implemented by just using lower doses and no placebos.  This follows mathematically because the placebo model collapses to the determistic model at the boundary: \hat h(q,p=0) = h(q, d=1) and \hat h(q,p=1) = h(q,d=0).

Now this is just a statement about the feasible set.  The benefit of placebo may come from the ability to implement the same outcome but with lower cost.   In terms of the model this would occur if the d that satisfies q(d) = q(p) is larger than 1- p.  That boils down to a cost-benefit calculation.  But I doubt that this kind of calculation is going to be pivotal in a debate about using placebos as medicine.

There have been many blog posts about a possible flaw in “Obamacare”.  Firms with more than 50 employees incur a fine of $2000/worker if they do not offer their workers healthcare.  Their costs of healthcare may be much higher than the penalty and so a preliminary analysis may suggest that they save money by dropping healthcare coverage.  John Cassidy does the calculation:

Take a medium-sized firm that employs a hundred people earning $40,000 each—a private security firm based in Atlanta, say—and currently offers them health-care insurance worth $10,000 a year, of which the employees pay $2,500. This employer’s annual health-care costs are $750,000 (a hundred times $7,500). In the reformed system, the firm’s workers, if they didn’t have insurance, would be eligible for generous subsidies to buy private insurance. For example, a married forty-year-old security guard whose wife stayed home to raise two kids could enroll in a non-group plan for less than $1,400 a year, according to the Kaiser Health Reform Subsidy Calculator. (The subsidy from the government would be $8,058.)

In a situation like this, the firm has a strong financial incentive to junk its group coverage and dump its workers onto the taxpayer-subsidized plan. Under the new law, firms with more than fifty workers that don’t offer coverage would have to pay an annual fine of $2,000 for every worker they employ, excepting the first thirty. In this case, the security firm would incur a fine of $140,000 (seventy times two), but it would save $610,000 a year on health-care costs. If you owned this firm, what would you do? Unless you are unusually public spirited, you would take advantage of the free money that the government is giving out. Since your employees would see their own health-care contributions fall by more than $1,100 a year, or almost half, they would be unlikely to complain. And even if they did, you would be saving so much money you afford to buy their agreement with a pay raise of, say, $2,000 a year, and still come out well ahead.

Actually, it is not clear the calculation is correct because there are tax breaks to employers who offer healthcare so the savings may not be as large as Cassidy calculates.  A second response is simple: why not just increase the penalties?  Cassidy has a ready counter-argument for this suggestion:

Even if the government tried to impose additional sanctions on such firms, I doubt it would work. The dollar sums involved are so large that firms would try to game the system, by, for example, shutting down, reincorporating under a different name, and hiring back their employees without coverage. They might not even need to go to such lengths. Firms that pay modest wages have high rates of turnover. By simply refusing to offer coverage to new employees, they could pretty quickly convert most of their employees into non-covered workers.

I was confused by this point.  Does the legislation distinguish between new employees and old employees?  If not, I don’t see how this gaming works.  If there is a gaming issue, then the legislation will have to be altered to cover all employees, not just present employees.

But finally, competition between firms is a factor that can prevent unraveling.  If a firm wants to retain its workers it will have to make up for any shortfall in the quality or price of healthcare in the exchanges by paying its workers more.  Otherwise, workers will go elsewhere.  The more skilled the labor-force, the more important it is to retain them.  In fact, given the absence of enforced provision of healthcare right now, the reason workers are being given healthcare benefits in the first place is because they have the option of working somewhere else.  We always emphasize how competition helps consumers but it also helps workers!

Healthcare reform may fail but it’s more likely to do so for some other reason (cost control, impossibility of rationing?)  than penalties which can so easily be adjusted.

The “Blooming” Flower Bread

The second-closest gas station to our current apartment was place of employment for one of the men arrested by the F.B.I. last week.

  1. Quantum money.
  2. Cloud that looks like Yoda.
  3. Lesbians that look like Justin Bieber.
  4. Why you lost all your Twitter followers on Monday.

1. Before the election the LibDems prepared

“for various contingencies using the principles of game theory developed by the Nobel prize-winning mathematician John Nash and regularly employed by the CIA.

This technique, where “mind trees” outlining various scenarios are drawn on whiteboards, was used by Vince Cable for many years when he was chief economist at Shell. Together with Chris Huhne, then a City analyst, they mapped out possible scenarios concerning political stability in Nigeria and the future of Norway’s regulatory framework.”

While their policies are closer to Labour:

“the top of the party is also united in its belief that they must remain “equidistant” from both Labour and the Tories in order to maximise their negotiating hand in the event of a hung Parliament.

They recognise, for instance, that it would be “suicide” for the party if it kept Gordon Brown in Number 10 in the event that the Conservatives emerge as the largest party.”

Since this article was published in the Guardian well before the election, Labour could have “war-gamed” their response.  I guess they did not as suggested by –

2. Andrew Adonis of the Labour negotiating team who complains that the LibDems overtures were

“an attempt by the Lib Dem leadership to conduct a dutch auction, inviting Labour to outbid the Tories on a shopping list of demands.”

These stories and the an analysis of what the electoral reform under consideration would have meant for the last election can be found in an excellent NYT blog post.

Does it ever happen to you that someone tells you something, then weeks or months pass, and the same person tells you the same thing again forgetting that they already told you before?

Why is it easier for the listener to remember than the speaker?  Is there some fundamental difference in the way memory operates?  Or is it that the memory is more evocative for the listener just because the fact being told is uniquely associated with the teller?  For the person doing the telling you are just a generic listener.  Or is it something else?  Answer below.

Read the rest of this entry »

A fungus is damaging opium poppies in Afghanistan.  The price of dry opium has gone up dramatically.  This is good for the Taliban in the short run as they have stockpiles of dry opium they can sell off at  higher price.  But in the medium term the price charged by farmers will go up as there is less crop to go around.  As input prices go up, profits go down.  Ceteris paribus, Taliban profits will go down in the medium term.  Drawn by higher profits, if entry of new farmers into opium production occurs in the long run, we will head back to the status quo.  Intermediate micro is kind of fun!

Seeing this logic at work, government intervention is possible: U.S. forces can discourage entry to keep input prices high and Taliban profits low.  I’m sure the Law of Unintended Consequences will be at work too.  What form it will take, by definition I cannot predict.

Local surfers jealously guard the best breaks by intimidating non-local interlopers.  Here is a paper by Daniel Kaffine that analyzes “localism” as a solution to a commons problem.

I use a unique cross-sectional data set covering 86 surf breaks along the California coast from San Diego to Big Sur to estimate the impact of exogenous wave quality on the strength of informal property rights. In the surfing context, groups of users known as “locals” enforce informal property rights, or localism, in order to reduce congestion from potential entrants, who are denoted “non- locals.” While not recognized legally, user-enforced informal property rights such as localism have features similar to those of formal property rights, such as rules on who may and may not have access to the resource. (“Localism” and “property rights” are used interchangeably throughout this paper.) Surfers in many loca- tions (including California) will tell visitors which breaks are open to anyone and which ones to steer clear of because of localism.

In theory, property rights raise the value of a common resource.  But how can this theory be verified in data?  The question is confounded by a reverse causality:  property rights are more likely to emerge when the resource was already of high value.  This data set solves the identification problem.

Unlike frequently studied resources such as fisheries, surf breaks (locations where waves are particularly conducive to surfing) have the feature that wave quality is exogenous with respect to property rights.4 The complex combination of tides, geology, and climatology that lead to high-quality waves would remain unchanged, even under private ownership. Waves do not care if they are ridden or not, which removes the feedback effects between the biophysical and social systems that are present in fisheries, for example. This natural exogeneity isolates the effect of quality in the estimation of its impact on property rights.

The finding is that higher-quality breaks are more likely to give rise to localism. The conclusion:

Thus, studies that attempt to infer the impact of property rights on quality must exercise caution in empirically attributing high resource quality to stronger prop- erty rights. The impact of property rights on resource quality may be overstated if the underlying differences in quality are not controlled for.

Panama pass:  orgtheory.net

Is the marginal incentive to become a terrorist increasing or decreasing in the level of drone strikes?  In the former case, terrorist activity is a strategic complement to drone strikes and, in the latter, a strategic substitute.  Of course, the relationship may change sign with the level of strikes , e.g. at a medium level of drone strikes, terrorist activity is a complement but at very high levels it is a substitute (as we  kill terrorists more quickly than they can be created!).

This issue lies at the heart of the optimal policy of drone strikes.  Robert Wright asks whether hawkish policies:

“have, while killing terrorists abroad, created terrorists both abroad and — more disturbingly — at home.

These possibly counterproductive hawkish policies go beyond drone strikes — a fact that is unwittingly underscored by the hawks themselves. They’re the first to highlight the role played by that imam in Yemen, Anwar al-Awlaki, in inspiring Shahzad and other terrorists. But look at the jihadist recruiting narrative al-Awlaki’s peddling. He says America is at war with Islam, and to make this case he recites the greatest hits of hawkish policy: the invasion of Iraq, the troop escalation in Afghanistan, drone strikes in Pakistan, etc.”

Wright adds:

“Unfortunately, President Obama isn’t discarding the Bush-Cheney playbook that has given jihadist recruiters such effective talking points. Quite the contrary: the White House thinks the moral of the Shahzad story may be that we should get more aggressive in Pakistan,possibly putting more boots on the ground. And already Obama has authorized the assassination of al-Awlaki.

Even leaving aside the constitutional questions (al-Awlaki is an American citizen), doesn’t Obama see what a gift the killing of this imam would be to his cause? Just ask the Romans how their anti-Jesus-movement strategy worked out. (And Jesus’s followers didn’t have their leader’s sermons saved in ready-to-go video and audio files; al-Awlaki’s resurrection would be vivid indeed.)”

David Jaeger and Daniele Paserman have done empirical work on this issue in the context of the Israeli-Palestinian conflict.  In one paper they find that Israeli fatalities in the last period are a good predictor of Palestinian fatalities the next (strategic complements) but Palestinian fatalities last period are not related significantly to Israeli fatalities the next.  It is not clear whether this translates to the Al Qaeda/Taliban context.  Surely the data is there somewhere to do the analysis.  Is Obama’s policy evidence-based or is he, as Wright suggests, just copying the Bush-Cheney playbook?

Affirmative action in hiring is more controversial than it has to be because of the way it is typically framed.  People who agree with the general motivation object to specific implementations like racial preferences and quotas because of their blunt nature.

Any affirmative action hiring policy entails a compromise because it mandates a distortion away from the employer’s unconstrained optimal practice.  We should look for ways that achieve the goals of affirmative action but with minimal distortions.

One simple idea is turn away from policies that incentivize hiring and instead incentivize search.  Suppose that the employer believes that 10% of all candidates are qualified for the job but that only 5% of all minorities are qualified.  Imposing a quota on the number of minority hires is less flexible than a quota on the number of minorities interviewed.

Requiring the employer to interview twice as many minority candidates equalizes the probability that the most qualified candidate is a minority or non-minority. Across all employers using this policy, the fraction of minority employees will hit the target.  But each individual employer is free to hire the most qualified candidate among the candidates identified so the allocation of workers is more efficient than would be achieved with a straight hiring quota.

Lebanon strikes the latest blow in an escalating hummus war with Israel.

Earlier this year, Israelis, who are also passionate about the smooth chick-pea spread, produced the 4,090-kilogram portion of hummus made by 50 chefs and put in a six-meter satellite dish.

Lebanon fought back, as 300 chefs in white coats of the al-Kataaf cooking school mashed up 10-tons of a special recipe for the occasion.

They mean business.

Sous-chef Alain Abou says it is not just about quantity, it is important for the hummus to taste good as well, even better, of course, than the Israelis’ creation.

“All the recipes, we prepare it before, we make it, we check it, so it is very good recipes,” said Abou. “We will beat it not in the army, but in the hummus.”

Elena Kagan is 50 years old which is not much younger than the average age of newly appointed justices:  53.  That average age upon entry has been relatively constant over time but with life expectancies steadily increasing, the average tenure on the court has increased from 15 to 25 years before and after 1970.

We could argue about the socially efficient entry age and tenure length but its more fun to think about strategy.  As a President from The Democratic Party you are today’s player in the infinite-horizon alternating-move SCOTUS appointment game. It is essentially a game of tug-of-war:  they will appoint conservatives to balance out the liberals that you will appoint in order to balance out their conservatives…

The younger your appointee the longer she will sit on the court.  On the plus side this means she is less likely to die or retire early.  On the down side you will have to live longer with a Justice whose views are harder to discern and are more likely to change.

Tradeoff?  Less than it appears.  It boils down to a comparison of two probabilities:  the probability that the older Justice will step down in a year when the Republicans control the White House versus the probability that the younger Justice will switch teams.  Unless there is a lot of uncertainty about the younger Justice, the second probability is smaller and you should appoint her.

How young should you go?  As you consider younger and younger nominees the mid-tenure defection eventually becomes the dominant concern.  The probability that a non-defector can retire under a Democrat administration reaches its maximum but the uncertainty surrounding a younger Justice steadily increases.

The Liberal Democrats have played the Conservatives and the Labour Party off against each other brilliantly.  While negotiating openly with the Conservatives, the Liberal Democrats were secretly talking to the Labour Party.

It was always clear that the game resembles an auction with two bidders, the Conservatives and Labour, and one object for sale, the Liberal Democrats.  The value that can be extracted by the Liberal Democrats as in classical auction theory depends on the bid of the second-highest bidder.  As I suggested in an earlier post, the Labour Party is the weak bidder as it got less votes in the General Election.  But Clegg’s masterstroke has been to strengthen the value of Labour by pressuring Brown to step aside, which he did today.  This immediately led to a stronger bid by the Conservatives: they are open to allowing a referendum on a change in the voting procedure used to elect Members of Parliament.  This is a cause dear to the hearts of the Liberal Democrats who cannot get many seats in parliament otherwise.

Has Labour leap-frogged the Conservatives as the strong bidder?  At least pretending this is the case is the next stratagem available to the Liberal Democrats to extract maximum concessions from the Conservatives.  The Conservatives will send out their right-wingers to show they won’t offer any more and the Liberal Democrats will send out their left-wingers to signal a better offer is necessary.  Some members of Labour may prefer to be in opposition.  The next government will have to make huge cuts in spending to rein in the deficit.  Better to wait on the sidelines and pick up the pieces in a few years.  There are so many layers to this it is hard to keep up!

Tyler Cowen tweeted:

Why do chess players hold their heads hard, with their hands, when they are thinking? If it works, why don’t more thinkers do it?

To prevent overheating of course.  You’ll notice that they typically extend their fingers and cover their foreheads which is the hottest part.  They are maximizing surface area in order to increase heat dissipation.

Here is a suggestion for how to super-cool your cranium and over-clock your brain.  On a more serious note, here is a pipe that is surgically implanted in the skull of epileptics to reduce the intensity of seizures.

Jonathan Weinstein is blogging now at The Leisure of the Theory Class.  His first post is a nice one on a common fallacy in basketball strategy.

if a player has a dangerous number of fouls, the coach will voluntarily bench him for part of the game, to lessen the chance of fouling out.  Coaches seem to roughly use the rule of thumb that a player with n fouls should sit until n/6 of the game has passed.  Allowing a player to play with 3 fouls in the first half is a particular taboo.  On rare occasions when this taboo is broken, the announcers will invariably say something like, “They’re taking a big risk here; you really don’t want him to get his 4th.”

The fallacy is that in trying to avoid the mere risk of losing minutes from fouling out the common strategy loses minutes for sure by benching him.

Jonathan discusses a couple of caveats in his post and here is another one.  The best players rise to the occasion and overcome deficits as necessary.  But they need to know how much of a deficit to overcome.

Suppose you know that a player will foul out in 1 minute.  There are 5 minutes to go in the game.  If you keep him in the game now he will have to guess how many points the opponents will score in the last 4 and try to beat that.  This entails risk because the opponents might do better than expected.

If you bench him until there is 1 minute left then all the uncertainty is resolved by the time he comes back.  Now he knows what needs to be done and he does it.

If Jonathan’s argument were correct then there would be no such thing as a “closer” in baseball.  At any moment in the game you would field your most effective pitcher and remove him when he is tired.  Instead there are pitchers who specialize in pitching the final innings of the game.

The role of a closer is indeed misunderstood in conventional accounts.  Just as in Jonathan’s argument there is no reason to prefer having your best pitcher on the mound in later innings, other things equal.  All innings are the same.  But this doesn’t mean you shouldn’t save your best pitcher for the end of the game.

Suppose he can pitch for only one inning. If you use him in the 8th inning the opposition might win with a big 9th inning and then you’ve wasted your best pitcher.  It would have been better to let them score their runs in the 8th.  That way you know the game is lost before you have committed your best pitcher. You can save him for the next game.

Here is a wide-ranging article about proposals to utilize placebos as medicine.

But according to advocates, there’s enough data for doctors to start thinking of the placebo effect not as the opposite of medicine, but as a tool they can use in an evidence-based, conscientious manner. Broadly speaking, it seems sensible to make every effort to enlist the body’s own ability to heal itself–which is what, at bottom, placebos seem to do. And as researchers examine it more closely, the placebo is having another effect as well: it is revealing a great deal about the subtle and unexpected influences that medical care, as opposed to the medicine itself, has on patients.

The article never mentions it so I wonder if any consideration has been given to the equilibrium effects.  Presumably the placebo effect requires the patient to believe that the drug is real. Then widespread use of true placebos will dilute the placebo effect.  Since real drugs also contribute a placebo effect on top of any pharmacological effects, the placebo component of existing drugs will be reduced.

Does the benefit of using placebos outweigh the cost of reducing the effectiveness of non-placebos?  If there is a complementarity between the placebo effect and real pharmacological effects it could be that zero is the optimal ratio of placebo to non-placebo treatments.

Note to my behavioral economics class:  this is a good example of a topic that would require the tools of psychological game theory due to the direct payoff consequences of beliefs.