We present a new index of social unrest based on counts of relevant media reports. The index consists of individual monthly time series for 130 countries, available with almost no lag, and can be easily and transparently replicated. Spikes in the index identify major events, which correspond...

We study the environmental and economic effects of public abatement in the presence of multiple stable steady-state ecological equilibria. Under shallow-lake dynamics (SLD), the isocline for the stock of pollution features two stable branches, a good and a bad one. Assuming that the ecology is...

We analyze the costs and benefits of using social image to foster virtuous behavior. A Principal seeks to motivate reputation-conscious agents to supply a public good. Each agent chooses how much to contribute based on his own mix of public-spiritedness, private signal about the value of the...

A simple model of yardstick competition between jurisdictions is presented. Governments of jurisdictions face the alternative to choose between an old and a new policy with stochastic payoffs. The new policy is superior to the old policy in one state of the world, and inferior in the other....

Much research on effects of international human rights institutions (IHRIs) is fixated on whether IHRIs have - "on balance" or "systematically" - generated domestic effect. This essay highlights the path-dependent and conditional nature of domestic effects of IHRIs that the current scholarship...

Much research on effects of international human rights institutions (IHRIs) is fixated on whether IHRIs have - "on balance" or "systematically" - generated domestic effect. This essay highlights the path-dependent and conditional nature of domestic effects of IHRIs that the current scholarship...

Interpersonal relations are shaped by the judgements associated with the social categories that individuals perceive in their social contacts. I develop a model of how those judgments form based on a theory of symbolic values. The model depicts the interaction between two values, one associated...