The Impact of Group Membership on Cooperation and Norm Enforcement: Evidence Using Random Assignment to Real Social Groups by Lorenz Goette, David Huffman and Stephan Meier. Published in volume 96, issue 2, pages 212-216 of American Economic Review, May 2006

Failing to refinance a mortgage can cost a borrower thousands of dollars. Based on administrative data from a large financial institution, we show that around 50% of borrowers leave thousands of dollars on the table by not refinancing. Survey data indicate that, among all the behavioral factors examined, only suspicion of banks’ motives is consistently related to the probability of accepting a refinancing offer. Finally, we report the results of three field experiments showing that enticing offers made by banks fail to increase participation and may even deepen suspicion. Our findings highlight the important role of trust in financial decisions. Received July 12, 2017; editorial decision April 3, 2018 by Editor Andrew Karolyi. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.

Using a large, representative sample of high-frequency credit card transactions in the United States, this paper examines the causal effect of sunshine-induced mood on contemporaneous household credit card spending. We document a 0.3 percent increase in credit card spending in response to a one-unit increase in the same-day local abnormal sunshine. The spending response is stronger for consumers with higher credit card debt, lower FICO score, and shorter tenure with the bank. The effect manifests in long-term, durable goods spending, and is not driven by other weather conditions, complementarity between sunshine and consumption, or intentional choice of consumption time. We document similar responses of spending on seasonal and non-seasonal goods and during times with high and low sunshine levels. Finally, the sunshine effect occurs among consumers with various characteristics.

This paper experimentally examines image motivation—the desire to be liked and well regarded by others—as a driver in prosocial behavior (doing good), and asks whether extrinsic monetary incentives (doing well) have a detrimental effect on prosocial behavior due to crowding out of image motivation. Using the unique property of image motivation—its dependency on visibility—we show that image is indeed an important part of the motivation to behave prosocially, and that extrinsic incentives crowd out image motivation. Therefore, monetary incentives are more likely to be counterproductive for public prosocial activities than for private ones. (JEL D64, L31, Z13)