Moreira, Marcelo J.; Porter, Jack R.; Suarez, Gustavo A. - Harvard Institute of Economic Research (HIER), … - 2004
It is well-known that size-adjustments based on Edgeworth expansions for the t-statistic perform poorly when instruments are weakly correlated with the endogenous explanatory variable. This paper shows, however, that the lack of Edgeworth expansions and bootstrap validity are not tied to the...