Recent Publications and papers:

Survey
Quantitative Economic History in the United States, in International Encyclopedia of the Social and Behavioral Sciences (2001).

Nationhood
The Role of Nationhood in the Economic Development of the USA, in Alice Teichova and Herbert Matis (eds.), Economic Change and the Nation State in History (Cambridge University Press, 2003), 387-403.

Natural Resources and Economic Growth
The Myth of the Resource Curse, (with Jesse Czelusta), Challenge (March-April 2004), 6-36.

Order Without Law: Property Rights During the California Gold Rush, (with Karen Clay),Explorations in Economic History 42 (April 2005), 155-183.

Resource-Based Growth Past and Present, (with Jesse Czelusta), in Daniel Lederman and William F. Maloney (eds.), Natural Resources: Neither Curse nor Destiny (World Bank/Stanford University Press, 2007), 183-211.

Labor History
The Industrious Revolution In America, in Laura Cruz and Joel Mokyr (eds.), The Birth of Modern Europe: Culture and Economy 1400-1800 (2010).

Arbitraging a Discriminatory Labor Market: Black Workers and the Ford Motor Company, 1918-1947, (with Christopher L. Foote and Warren Whatley), Journal of Labor Economics 21 (July 2003), 493-531.

Technology and Productivity
Productivity Growth and the American Labor Market: The 1990s in Historical Perspective, in Paul Rhode and Gianni Toniolo (eds.), Understanding the 1990s (Cambridge University Press, 2006), 139-160.