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On the validity of econometric techniques with weak instrum.. 

, In: Journal of human resources / publ. under the ausp. of the International Relations Research Institute and the Institute for Research on Poverty
inference on returns to education using compulsory school a... 
Cruz, Luiz M.. (2005)  2 - p. 393-410
Exemplar:  Zentrale:E02 z sow 006/856; Zentrale:Magazin Zs fc 4856