I wish I had written this paper:

Candy We Still Believe In: Using Halloween to Measure Change in Extensive and Intensive Support for  Barack Obama

Jane Bang
Zachary Groff
Dean Karlan
Sakshi Kumar
Kelsey Larson
November 1st, 2012

In a field experiment conducted during Halloween with children trick-or-treating, we find that in this particular Connecticut neighborhood, Obama’s support has not changed since 2008 on either the extensive (as measured by the choice children made between two sides of a porch, labeled the Romney and Obama side) or the intensive margin (enthusiasm of supporters measured by the elasticity with respect to candy, by offering some children more candy to go to Romney).