Using the gravity model, we find evidence of three continental trading blocs: the Americas, Europe and Pacific Asia. Intra-regional trade exceeds what can be explained by the proximity of a pair of countries, their sizes and GNP/capitas, and whether they share a common border or language. We...

In this paper, we present a model where trade is motivated both by preference for variety and comparative advantages. We use this framework to analyze the welfare implications of trading blocs among countries with different endowments with and without transportation costs. In this framework, we...

This paper explores the links between institutional arrangements and fiscal performance in" Latin America. We consider four measures of fiscal performance, namely expenditures, the size of fiscal deficits and debt, and the response of fiscal policy to business" fluctuations; and two...

In this paper we collect detailed information on the budget institutions of Latin American countries. We classify these institutions on a `hierarchical'/'collegial' scale, as a function of their transparency and the existence of legislative constraints on the deficit. We then show that...

This paper summarizes recent research by the authors on the effects of free trade areas (FTAs). Within our model, which emphasizes inter-continental transport costs, several conclusions arise. (1) FTAs are likely to be detrimental over a moderate range of parameter values, even if drawn along...

We study the behavioral changes due to marijuana consumption on fertility and its key mechanisms, as opposed to physiological changes. We can employ several large proprietary data sets, including the 1997 National Longitudinal Survey of Youth, Nielsen Retail Scanner database, as well as the...

Across public junior high schools in 21 Colombian cities, we conducted a randomized evaluation of a mandatory six-month internet-based sexual education course. Six months after finishing the course, we find a 0.4 standard deviation improvement in knowledge, a 0.2 standard deviation improvement...

Does information about rampant political corruption increase electoral participation and the support for challenger parties? Democratic theory assumes that offering more information to voters will enhance electoral accountability. However, if there is consistent evidence suggesting that voters...

We mailed letters to non-existent business addresses in 159 countries (10 per country), and measured whether they come back to the return address in the US and how long it takes. About 60% of the letters were returned, taking over 6 months, on average. The results provide new objective...