The spatial segregation of college-educated and non-college-educated workers between
commuting zones in the United States has steadily grown since 1980. We summarize prior …

ABSTRACT The County Business Patterns data published by the US Census Bureau track
employment by county and industry from 1946 to the present. Two features of the data limit …

We examine the mechanism by which human capital affects economic growth and
convergence, using provincial level panel data from China. We specify alternative measures …

Virtually all theories of economic growth predict a positive relationship between population
size and productivity. In this paper, I study a particular historical episode to provide direct …

How do international trade shocks affect spatially connected regional markets? We answer
this question by extending shift-share empirical specifications to incorporate general …

How do shocks to economic fundamentals in the world economy affect local labor markets?
In a framework with a flexible structure of spatial linkages, we characterize the model …

We collect data on prices, travel costs and farmer decisions to quantify market access for
chemical fertilizer and its impact on agricultural productivity in 1,180 villages in Northern …

Since 1980, economic growth in the US has been fastest in its largest cities. We show that a
group of skill-and information-intensive service industries are responsible for all of this new …

We document the role of intangible capital in manufacturing firms' substantial contribution to
non-manufacturing employment growth from 1977-2019. Exploiting data on firms'" auxiliary" …

In recent decades, middle-paid jobs have declined, replaced by a mix of high and low-paid
jobs. This is labor market polarization. At the same time, initially skilled and typically larger …