We investigate the relationship between interstate highways and highway vehicle kilometers traveled (VKT) in US cities. We find that VKT increases proportionately to highways and identify three important sources for this extra VKT: an increase in driving by current residents; an increase in...

In many societies, social norms create common property rights in natural resources, limiting incentives for private investment. This paper uses a randomized evaluation in Kenya to measure the health impacts of investments to improve source water quality through spring protection, estimate the...

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...

Place-based policies commonly target underperforming areas, such as deteriorating downtown business districts and disadvantaged regions. Principal examples include enterprise zones, European Union Structural Funds, and industrial cluster policies. Place-based policies are rationalized by various...

Previous work on transportation investments has focused on average impacts in high- and middle-income countries. We estimate average and heterogeneous effects in a poor continent, Africa, using roads and cities data spanning 50 years in 39 countries. Using changes in market access due to distant...

We examine the productivity of public infrastructure in a general equilibrium context. In our model, infrastructure lowers costs in a manufacturing sector characterized by both firm-level returns to scale and industry-level external returns to variety. Infrastructure alters factor prices,...

Several explanations can be offered for the unbalanced growth of U.S. regional manufacturing industries in the decades after World War II. The convergence hypothesis suggests that the success of the South in catching up to the Northeast and Midwest should be understood by analogy with the...

The impact of public infrastructure investment on the productive performance of firms has been an important focus of the recent literature on productivity growth. The size of this impact has important implications for policymakers' decisions to invest in public capital, and productivity...

The state of Indiana set out to build a Mammoth system of canals, railroads, and turnpikes in 1836, after a decade of intense debate in which sectional rivalries prevented any state action. This paper investigates the role played by the adoption of an ad valorem property tax in ameliorating the...

This paper summarizes economic research on investment in public infrastructure and introduces the findings of several new studies on this topic. It begins with a review of several potential justifications for the public sector’s involvement in building, financing, and operating infrastructure,...