000 00386nam a2200133Ia 4500
008 100324s9999 xx 000 0 und d
100 _aTybout J.R
245 _aEstimating returns to scale with large imperfect panels
260 _c0
_bWorld Bank
_aWashington DC
366 _b0
650 _aAccounting
942 _cBK
999 _c74367
_d74367