00340nam a22001097a 4500008004100000082002000041100001700061245008100078260001500159300001600174490004000190260219b        |||||||| |||| 00| 0 eng d  a330.183bK64.SE  aKlein, L. R.  aSingle equation vs. equation system methods of estimation in econometricsb/  c1960a b   app. 866-871  aEconometrica, v.28, no.4, Oct. 1960