Most projects, in most walks of life, require the participation of multiple parties. While it is difficult to unite individuals in a common endeavor, some people, whom we call “movers and shakers,” seem able to do it. The paper specifically examines moving and shaking of an investment...

We study information disclosure and diversification in contests with technological uncertainty, where agents can pursue different technologies to compete in the contest, but there is uncertainty regarding which will be implemented ex post. The principal can credibly reveal some information about...

We give variants on Berge's Maximum Theorem in which the lower and the upper semicontinuities of the preference relation are assumed for two different topologies on the action set, i.e., the set of actions availabe a priori to the decision-maker (e.g. a household with its consumption set). Two...

The actions of different agents sometimes reinforce each other. Examples are network effects and the threshold models used by sociologists as well as Harvey Leibensteins's "bandwagon effects." We model such situations as a game with increasing differences, and show that tipping of equilibria,...

We report experimental evidence on the effect of observability of actions on bank runs. We model depositors' decision-making in a sequential framework, with three depositors located at the nodes of a network. Depositors observe the other depositors' actions only if connected by the network....

While an international agreement over the reduction of greenhouse gases (GHGs) emissions proves to be elusive, there is a large and growing support for investment in developing more effective technologies to adapt to climate change. We show that an increase in effectiveness of adaptation will...

This classroom exercise illustrates the strengths and weaknesses of various regulatory frameworks aimed at internalizing negative externalities from pollution. Specifically, the exercise divides students into three groups - the government regulatory agency and two polluting firms - and allows...

Consider a situation in which countries anticipate an international environmental agreement (IEA) to be in effect sometime in the future. What is the impact of the future IEA on current emissions after its announcement? We show that the answer to this question is ambiguous. We examine four types...

Consumer boycotts are commonly used by citizens protesting against unfair environmental, social, or health practices by firms. Game theory offers simple tools to analyze the impact and the potential for success of such actions. Consumer boycotts may be viewed as a war of attrition between a...