Timothy J. Hatton is Professor of Economics at the Australian National University and the University of Essex. He is the co-author (with Jeffrey Williamson) of Global Migration and the World Economy.

Jeffrey G. Williamson is Laird Bell Professor of Economics Emeritus at Harvard and Honorary Fellow in the Department of Economics at the University of Wisconsin–Madison. He is the coauthor (with Kevin O'Rourke) of Globalization and History: The Evolution of a Nineteenth-Century Atlantic Economy and (with Timothy J. Hatton) of Global Migration and the World Economy: Two Centuries of Policy and Performance, both published by the MIT Press.