NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Tianshu Sun

Marshall School of Business
3670 Trousdale Pkwy, Los Angeles, CA 90089

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Institutional Affiliation: USC Marshall School of Business

NBER Working Papers and Publications

November 2015Mobile Messaging for Offline Group Formation in Prosocial Activities: A Large Field Experiment
with Guodong (Gordon) Gao, Ginger Zhe Jin: w21704
In this paper, we use mobile messaging to leverage recipients’ social ties and encourage offline prosocial activities in groups. In particular, we conduct a randomized field experiment with 80,000 blood donors and study how behavioral interventions and economic rewards motivate offline group formation. We find that two commonly used interventions—reminder messages and individual reward—are ineffective in motivating group formation because they do not compensate donors for the cost of bringing friends. In contrast, we find that group reward—a new reward that is contingent on a donor bringing a friend—is effective in motivating group formation. Furthermore, group reward tends to attract different types of donors, especially those who are traditionally less active in online social settings bu...

Published:

July 2015Solving Shortage in a Priceless Market: Insights from Blood Donation
with Susan Feng Lu, Ginger Zhe Jin: w21312
Shortage is common in many markets, such as those for human organs or blood, but the problem is often difficult to solve through price adjustment, given safety and ethical concerns. In this paper, we investigate whether market designers can use non-price methods to address shortage. Specifically, we study two methods that are used to alleviate shortage in the market for human blood. The first method is informing existing donors of a current shortage via a mobile message and encouraging them to donate voluntarily. The second method is asking the patient’s family or friends to donate in a family replacement (FR) program at the time of shortage. We are interested in both the short-run and long-run effects of these methods on blood supply. Using 447,357 individual donation records across 8 yea...

Published: Tianshu Sun & Susan Feng Lu & Ginger Zhe Jin, 2016. "Solving Shortage in a Priceless Market: Insights from Blood Donation," Journal of Health Economics, .

 
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