About the Book:About the Author: Joel Perlmann is a senior scholar at the Jerome Levy Economics Institute of Bard College and Levy Institute Research Professor at the College. He is the author of Ethnic Differences: Schooling and Social Structure among the Irish, Italians, and Blacks in an American City, 1880-1935. Robert A. Margo is a professor of economics at Vanderbilt University and a research associate of the National Bureau of Economic Research. He is the author, most recently, of Wages and Labor Markets in the United States, 1820-1860, published by the University of Chicago Press.