00292nam a2200109Ia 4500008004100000082001700041100001700058245004600075260001500121300000600136490004000142260219b        |||||||| |||| 00| 0 eng d  a330.183 W354  aWaugh, F. V.  aPlace of least squares in econometricsb/  c1961a b   a   aEconometrica, v.29, no.3, July 1961