作者：Ubfal, Diego
作者单位：Bocconi University; Bocconi University
摘要：This paper tests the commonly-used assumption that people apply a single discount rate to the utility from different sources of consumption. Using survey data from Uganda with both hypothetical and incentivized choices over different goods, we elicit time preferences from about 2400 subjects. We reject the null of equal discount rates across goods: the average person in our sample is more impatient about sugar, meat and starchy plantains than about money and a list of other goods. We review th...
作者：Blumenstock, Joshua E.; Eagle, Nathan; Fafchamps, Marcel
作者单位：University of Washington; University of Washington Seattle; The Santa Fe Institute; Stanford University
摘要：We provide empirical evidence that Rwandans use the mobile phone network to transfer airtime to those affected by unexpected shocks. Using an extensive dataset on mobile phone activity in Rwanda and exploiting the quasi-random timing and location of natural disasters, we show that individuals make transfers and calls to people affected by disasters. The magnitude of these transfers is small in absolute terms, but statistically significant; in response to the Lake Kivu earthquake of 2008, we es...
