Medicine by Alexandros G.Sfakianakis,Anapafseos 5 Agios Nikolaos,Crete 72100,Greece,tel :00302841026182 & 00306932607174
Kitagawa, T; (2015) A Test for Instrument Validity. Econometrica , 83 (5) pp. 2043-2063. 10.3982/ECTA11974 . Green open access from #MedicinebyAlexandrosSfakianakis via xlomafota13 on Inoreader http://ift.tt/1XldioV via IFTTT
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