Multinational Expansion in Time and Space
---- Acknowledgments ----
We thank our discussants Maggie Chen, Javier Cravino, Ana Maria Santacreu, Michael Sposi, and Stephen Yeaple for very helpful comments in more than one occasion. We have also benefited from comments from George Alessandria, Costas Arkolakis, Ariel Burstein, Jonathan Eaton, Oleg Itskhoki, Samuel Kortum, Andrei Levchenko, Eduardo Morales, Ezra Oberfield, and Andr\`es Rodr\'iguez-Clare, as well as seminar participants at various conferences and institutions. Xiao Ma provided outstanding research assistance. The statistical analysis of firm-level data on US multinational companies was conducted at the Bureau of Economic Analysis, US Department of Commerce, under arrangements that maintain legal confidentiality requirements. The views expressed are those of the authors and do not reflect official positions of the US Department of Commerce. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.