We study the informational efficiency of a market with a single traded asset. The price initially differs from the fundamental value, about which the agents have noisy private information (which is, on average, correct). A fraction of traders revise their price expectations in each period. The...

We propose an opinion dynamics model that combines processes of vanity and opinion propagation. The interactions take place between randomly chosen pairs. During an interaction, the agents propagate their opinions about themselves and about other people they know. Moreover, each individual is...

We build a simple model of legal dualism in which a pro-poor legal reform, under certain conditions, causes the conflicting custom to go some way toward producing the change intended by the legislator. It then acts as an 'outside anchor' that exerts a 'magnet effect' on the custom. We illustrate...

Despite the fact that nonprofit organizations play a large role in the production and distribution of goods and services in modern economies, and the rising role of non-governmental organizations in carrying out projects in developing countries, our knowledge of their governance, and of its’...

Mission-driven nonprofit organizations compete for donations through fundraising activities. Such competition can lead to inefficient outcomes, if nonprofits impose externalities on each others' output. This paper studies the sustainability of fundraising coordination agreements, using a...

Globalization has been accompanied by rising pressure from advocacy non-governmental organizations (NGOs) on multinational firms to act in socially-responsible manner. We analyze how NGO pressure interacts with industry structure, using a simple model of NGO-firm interaction embedded in an...

This paper systematizes the results of the empirical literature on development non-governmental organizations (NGOs), drawing both from quantitative and qualitative analyses, and constructs a set of basic facts about these organizations. These basic facts concern the size of the development NGO...

Mission-driven nonprofit organizations compete for donations through fundraising activities. Such competition can lead to inefficient outcomes, if nonprofits impose externalities on each others' output. This paper studies the sustainability of fundraising coordination agreements, using a...

We model the State as a self-enforcing agreement over the use of force. A principal contracts with an agent, and a powerful ruler enforces their contracts through a mix of monetary fines and coercion. If the ruler fails to enforce, or if he uses his power to expropriate, all parties revert to...