00337nam a2200109Ia 4500008004100000020001500041082002400056100002700080245005900107260003300166300002800199250211b        |||||||| |||| 00| 0 eng d  a0262232197  a330.015195bW913.EA  aWooldridge, Jeffrey M.  aEconometric analysis of cross section and panel data /  aCambridge:bMIT Press,c2002  axxi, 752p. Bibl. Index.