Julian Jamison

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Understanding more about how the brain functions should help us understand economic behaviour. But some would have us believe that it has done this already, and that insights from neuroscience have already provided insights in economics that we would not otherwise have. Much of this is just academic marketing hype, and to get down to substantive issues we(More)
We study collective decisions by time-discounting individuals choosing a common consumption stream. We show that with any heterogeneity in time preferences, any Pareto e¢ cient and non-dictatorial method of aggregating utility functions must be time inconsistent. We also show that utilitarian aggregation necessitates a present bias, and decisions made via(More)
  • Damien de Walque, William H Dow, Rose Nathan, Ramadhani Abdul, Faraji Abilahi, Erick Gong +13 others
  • 2012
OBJECTIVE The authors evaluated the use of conditional cash transfers as an HIV and sexually transmitted infection prevention strategy to incentivise safe sex. DESIGN An unblinded, individually randomised and controlled trial. SETTING 10 villages within the Kilombero/Ulanga districts of the Ifakara Health and Demographic Surveillance System in rural(More)
Weinstein and Martin Weitzman — on an earlier draft at a seminar at Resources for the Future. Ken-neth Arrow provided valuable written comments. (through Order No. 263-MK-610514) provided partial support for preparation of this paper. Conclusions and opinions expressed are those of the authors and not of the U.S. government.
We propose that individuals consider future versions of themselves to truly be separate persons, not simply as a convenient modeling device but in terms of actual brain systems and decision‐making processes. Intertemporal choices are thus quite literally strategic interactions between multiple agents. Previous neuroscientific studies have found evidence(More)
Intra-month cycles in household consumption and expenditure are considered hallmarks of dynamically inconsistent behavior. I find that Electronic Benefit Transfer reduced the severity of the these cycles for SNAP (food stamp) households with children and dual-parent households. The evidence suggests an explanation based on collective dynamic inconsistency –(More)
We analyze how different degrees of privacy protection affect industry profits, consumer welfare and total welfare. Firms earn higher profits under complete privacy protection compared with limited or no privacy protection. However, with limited privacy protection, the relationship between the degree of privacy protection and equilibrium profits is not(More)
Players in economic situations often have preferences not only over their own outcome but also over what happens to fellow players, entirely apart from any strategic considerations. While this can be modeled directly by simply writing down final preferences, these are commonly unknown a priori. In many cases it is therefore both helpful and instructive to(More)
Given the substantial amount of resources currently invested in microcredit programs, it is more important than ever to accurately assess the extent to which peer monitoring by borrowers faced with group liability contracts actually reduces moral hazard. We conduct a field experiment with women about to enter a group loan program in Paraguay and then gather(More)
Economic theory predicts that in a first-price auction with equal and observable valuations, bidders earn zero profits. Theory also predicts that if valuations are not common knowledge, then since it is weakly dominated to bid your valuation, bidders will bid less and earn positive profits. Hence, rational players in an auction game should prefer less(More)