%A Phelps, Edmund S. %A Phelps, Charlotte %T Factor-price-frontier estimation of a "Vintage" production model of the postwar United States nonfarm business sector %I Cowles Foundation for Research in Economics at Yale University %D 1967 %S Cowles Foundation paper / Cowles Foundation for Research in Economics at Yale University %V no. 253 %U https://ci.nii.ac.jp/ncid/BA64584630