We identify a new route through which patent protection may affect R&D incentives, the tournament effect. It may decrease R\&D incentives, in which case patent protection may either adversely affect the level of R&D, or may discourage licensing. In either case welfare may fall.

This paper surveys the evolutionary game theoretic literature on reciprocity in human interactions, dealing both with long-term relationships and with sporadic interactions. Four basic themes, repetition, commitment, assortation, and parochialism, appear repeatedly throughout the literature....

A randomly selected treatment group of households in Gurgaon, India was informed whether (or not) their drinking water had tested positive for fecal contamination using a simple test costing about $0.50. Households that were not initially purifying their water, and were told that their drinking...

Very poor households may be excluded from public programs intended for their benefit for a variety of reasons as lack information, a permanent residence or membershiip in social networks. We are interested in methods of testing for such exclusion based on independently drawn samples of program...

As the exchange rate, foreign demand, production costs and export promotion policies evolve, manufacturing firms are continually faced with two issues: whether to be an exporter, and if so, how much to export. we develop a dynamic structural model of export supply that characterizes these two...

This paper presents simple measures of individual and family mental health indices based on axiomatic foundations and integrates mental health into a neoclassical model that allows for proper substitution possibilities in the family preferences and quantifies its significance in family utility....

In the recent past, many economies, attempting to become more open, have adopted policies fostering a less restrictive trade regime. In their attempts to become more open, policy makers can, with the best of intentions, adopt policies that have unforeseen and often undesirable side effects. In...

Much of economics is built on the assumption of individuals being driven by self-interest and economic development as an outcome of the free play of such individuals. On the few occasions that economics recognizes the role of altruism and trust, the tendency is to build these from the axiom of...

This paper analyzes the formation of networks when players choose how much to invest in each relationship. We suppose that players have a fixed endowment that they can allocate across links, and in the baseline model, suppose that link strength is an additively separable and convex function of...

This paper examines how public goods get allocated by a centralized state. We use data on social structure and public goods in rural India over the sixties, seventies and eighties to examine the influence of particular social groups, and of social and economic heterogeneity more generally, on...