This article applies an earlier analysis of interdependent security issues to a general class of problems involving discrete interdependent exposure to terrorist risks. Any agent’s incentive to adopt risk-reducing measures depends on the actions of others because of the negative...

Long-run and short-run policies to increase the share of bicycle transportation for commuting to and from work are discussed. Analyses of data collected in the Philadelphia metropolitan area show that two general approaches can be taken to promote bicycle transportation. One is a set of policies...