Duke Fuqua School of Business
100 Fuqua Drive
Durham, NC 27708
NBER Working Papers and Publications
|July 2018||Peer Effects in Water Conservation: Evidence from Consumer Migration|
with Jesse Burkhardt, Kenneth Gillingham: w24812
Social interactions are widely understood to influence consumer decisions in many choice settings. This paper identifies causal peer effects in water conservation during the growing season, utilizing variation from consumer migration. We use machine learning to classify high-resolution remote sensing images to provide evidence that conversion to dry landscaping underpins the peer effects in water consumption. We also provide evidence that without a price signal, peer effects are muted, demonstrating a complementarity between information transmission and prices. These results inform water use policy in many areas of the world threatened by recurring drought conditions.
|January 2010||Calorie Posting in Chain Restaurants|
with Phillip Leslie, Alan Sorensen: w15648
We study the impact of mandatory calorie posting on consumers' purchase decisions, using detailed data from Starbucks. We find that average calories per transaction falls by 6%. The effect is almost entirely related to changes in consumers' food choices--there is almost no change in purchases of beverage calories. There is no impact on Starbucks profit on average, and for the subset of stores located close to their competitor Dunkin Donuts, the effect of calorie posting is actually to increase Starbucks revenue. Survey evidence and analysis of commuters suggest the mechanism for the effect is a combination of learning and salience.
Published: Bryan Bollinger & Phillip Leslie & Alan Sorensen, 2011. "Calorie Posting in Chain Restaurants," American Economic Journal: Economic Policy, American Economic Association, vol. 3(1), pages 91-128, February. citation courtesy of