One of the great puzzles of Sub-Saharan African economic history is that wheeled transportation was barely used prior to the colonial period. Instead, head porterage was the main method of transportation. The consensus among historians is that this was a rational adaption to the underlying...

Understanding the sensitivity of gasoline demand to changes in prices and income has important implications for policies related to climate change, optimal taxation and national security, to name only a few. While the short-run price and income elasticities of gasoline demand in the United...

Measurement of seat belt and air bag effectiveness is complicated by the fact that systematic data are collected only for crashes in which a fatality occurs. These data suffer from sample selection since seat belt and air bag usage influences survival rates which in turn determine whether a...

Specialization alters the incidence of manufacturing trade costs to buyers and sellers, with pro-and anti-globalizing effects on 76 countries from 1990-2002. The structural gravity model yields measures of Constructed Home Bias (the ratio of predicted local trade to predicted frictionless local...

This paper surveys the theoretical and empirical literature on the relationship between the spatial distribution of economic activity and transportation costs. We develop a multi-region model of economic geography that we use to understand the general equilibrium implications of transportation...

The importance of increments to an existing highway system depends upon their contributions to the accessibility provided by the existing network. Nearly 40 years ago, Mohring [1965] suggested this logic for planning optimal highway investment programs. He argued it could be implemented by...

From 1980 to 1992, emerging and developing countries grew by 3.4 percent per year. Their annual rate of growth increased to 5.4 percent between 1993 and 2012. No such increase occurred for advanced nations, whose average growth from 1980-2012 was roughly constant (excluding the impact of the...

We use international household-survey data to document that experience-wage profiles are flatter in poorer countries than in richer countries. We find a quantitatively similar pattern when we estimate returns to foreign experience by country of origin among U.S. immigrants. The most likely...

Empirical evidence on the relationship between democracy and economic reforms is limited to few reforms, countries, and periods. This paper studies the effect of democracy on the adoption of economic reforms using a new dataset on reforms in the financial, capital and banking sectors, product...

This review essay of the two-volume Cambridge History of Capitalism (2014), edited by Larry Neal and Jeffrey G. Williamson, is divided into three parts. First, I describe three chapters from the second volume that I recommend for all economists to add depth to their understanding of the world...