Acknowledgments

Claudia Goldin is grateful to the research assistants who ably helped with this project: Nora Gordon, Marina Jovanovic, Michael Pisetsky, and Alicia Sasser. Caroline Hoxby and Barry Hirsch were consulted on some of the series. Tom Snyder of the U.S. Department of Education, National Center for Education Statistics, gave unstinting help with numerous details, and Shirley Smith of the U.S. Bureau of the Census, Income Division, was generous with her time as well. The data series compilation was funded by a grant from the Spencer Foundation through the National Bureau of Economic Research.