Sanderson, Eleanor; Windmeijer, Frank - Centre for Market and Public Organisation (CMPO), … - 2013
We consider testing for weak instruments in a model with multiple endogenous variables. Unlike Stock and Yogo (2005 … estimator and the Wald tests size distortions. When δ = 0 in the two-variable model, or when there are more than two endogenous … variables, further information over and above the Cragg-Donald statistic can be obtained about the nature of the weak instrument …