00385nam a22001337a 4500008004100000020001500041050002600056100002700082245007200109250001300181260002300194300001700217650001700234180627b        xxu||||| |||| 00| 0 eng d  a1337558860  aHB139b.W66 2020 c. 1  aWooldridge, Jeffrey M.  aIntroductory econometricsba modern approachcJeffrey M. Wooldridge  a7th ed.   aUSAbCengagec2020  axxii, 826 p.  aEconometrics