Journal of Political Economy 1967 75(6), 782-795

Journal of Political Economy 1956 64(2), 181-182

Journal of Political Economy 1955 63(2), 162-173

Journal of Political Economy 1953 61(5), 406-412

Journal of Political Economy 1950 58(6), 513-522

Journal of Political Economy 1948 56(6), 480-497

Journal of Political Economy 1947 55(6), 537-552

Journal of Political Economy 1946 54(2), 170-176

Journal of Political Economy 1946 54(5), 451-454

Journal of Political Economy 1946 54(4), 363-367