Most analyses of conflict assume that conflicting groups act in a unitary fashion. This assumption is often violated: to reduce their risk of replacement, group leaders prevent both group members and soldiers from acting collectively, making it difficult for leaders to make credible commitments...

The ability of citizens to act collectively plays a central role in major debates in the political economy of development, including the causes and consequences of democratization and clientelism. This essay uses two lines of research to underscore the importance of explicitly introducing the...

The literature argues that the presence of multiple veto players (government decisionmakers) with polarized interests increases the credibility of sovereign commitments, but reduces the ability of governments to adjust policies in the event of exogenous shocks that jeopardize their ability to...

This paper introduces a large new cross-country database on political institutions: the Database on Political Institutions (DPI). The authors summarize key variables (many of them new), compare this data set with others, and explore the range of issues for which the data should prove invaluable....

Douglass North (1990) describes institutions as the rules of the game that set limits on human behavior, now a universally-accepted definition. North and others especially underline the crucial role of informal social norms. They predict that, like all rules of the game, social norms should...

We reconstruct a dataset used by Persson and Tabellini (AER, 1994) to test the robustness of their finding that inequality reduces income growth, but only in democracies. We find that their result is highly sensitive to the use of data sources on both democracy and inequality. When we substitute...

Economic consequences of terrorism in developed and developing countries : an overview / Walter Enders and Todd Sandler -- The costs of responding to the terrorist threat : the U.S. case / Gregory F. Treverton ... [et al.] -- From (no) butter to guns? understanding the economic role in...

The report Jobs or Privileges: Unleashing the Employment Potential of the Middle East and North Africa shows that policies that lower competition and create an uneven playing field are common and constrain private sector job creation. These policies take different forms across countries and...