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...

Tech clusters like Silicon Valley play a central role for modern innovation, business competitiveness, and economic performance. This paper reviews what constitutes a tech cluster, how they function internally, and the degree to which policy makers can purposefully foster them. We describe the...

We use new theory and data to study how firms endogenously form production networks across regions and countries. Supplier and buyer relationships form depending on firms' productivity and geographic location. We characterize the normative and positive properties of the spatial distribution of...

Bureaucracies may set priorities for their workload according to social goals or the desires of concentrated private interests. This paper explores bureaucratic priorities empirically by studying Superfund, the federal program for cleaning up contaminated sites. It examines the amount of time...

Many communities are concerned about the reuse of potentially contaminated land ("brownfields") and believe that environmental liability is a hindrance to redevelopment. However, with land price adjustments, liability might not impede the reuse of this land. Existing literature has found price...

The U.S. Environmental Protection Agency Brownfields Program awards grants to redevelop contaminated lands known as brownfields. This paper estimates cleanup benefits by combining administrative records for a nationally representative sample of brownfields with high-resolution, high-frequency...

Convergence in per capita income across countries turns on whether technological knowledge spillover are global or local. This paper estimates the amount of spillover from R&D expenditures in major industrialized countries on a geographic basis. A new data set is used which encompasses most of...

U.S. invention has become increasingly concentrated around major tech centers since the 1970s, with implications for how much cities across the country share in concomitant local benefits. Is invention becoming a winner-takes-all race? We explore the rising spatial concentration of patents and...

We examine how exposure of Chinese firms to the Covid-19 shock varied with a cluster index (measuring spatial agglomeration of firms in related industries) at the county level. Two data sources are used: entry flows of newly registered firms in the entire country, and an entrepreneur survey...