Two Working Papers from the World Bank

The economics of consanguineous marriages;

The institution of consanguineous marriage-a marriage contracted between close biological relatives-has been a basic building block of many societies in different parts of the world. This paper argues that the practice of consanguinity is closely related to the practice of dowry, and that both arise in response to an agency problem between the families of a bride and a groom. When marriage contracts are incomplete, dowries transfer control rights to the party with the highest incentives to invest in a marriage. When these transactions are costly however, consanguinity can be a more appropriate response since it directly reduces the agency cost. The paper's model predicts that dowry transfers are less likely to be observed in consanguineous unions. It also emphasizes the effect of credit constraints on the relative prevalence of dowry payment and consanguinity. An empirical analysis using data from Bangladesh delivers robust results consistent with the predictions of the model.

Are lives a substitute for livelihoods ? Terrorism, security, and U.S. bilateral imports;

What is the impact of terrorism on trade through higher security at the borders? The authors set up a theory which shows that the impact goes not only from terrorism to trade. Higher trade with a partner might, in turn, increase the probability of terrorism acts and make security measures more costly for total welfare. To identify the true impact of terrorism, their theory allows for a strategy to condition out the latter mechanism. The authors show in particular how past incidents perpetrated in third countries (anywhere in the world except the origin or targeted country) constitute good exogenous factors for current security measures at the borders. Their tests suggest that terrorist incidents have a small effect on U.S. imports on average, but a much higher effect for those origin countries at the top of the distribution of incidents. In addition, the level of the impact is up to three times higher when the acts result in a relatively high number of victims, the products are sensitive to shipping time, and the size of the partner is small. The authors further show how terrorism affects the number of business visas given by the United States, thereby affecting significantly U.S. imports in differentiated products. These results suggest that security to prevent terrorism does matter for trade

Emphasis mine.