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A test of the conditional independence assumption in sample selection models
Huber, Martin, (2015)
Huber, Martin, (2012)
Testing exogeneity in cross-section regression by sorting data
DeLuna, Xavier, (2000)
Why do tougher caseworkers increase employment? : the role of program assignment as a causal mechanism
Huber, Martin, (2017)
Testing instrument validity for LATE identification based on inequality moment constraints
Why do tougher caseworkers increase employment? : the role of programme assignment as a causal mechanism
Huber, Martin, (2014)