American Economic Journal: Applied Economics 3 (October 2011): 152-185. http://www.aeaweb.org/articles.php?doi=10.1257/app.3.4.152
2011
American Economic Journal: Applied Economics 3 (October 2011): 152-185. http://www.aeaweb.org/articles.php?doi=10.1257/app.3.4.152