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The Distribution of the Instrumental Variables Estimator and Its t-Ratio When the Instrument Is a Poor One.
Nelson, Charles R, (1990)
Valid Confidence Intervals and Inference in the Presence of Weak Instruments.
Zivot, Eric, (1998)
Mean Reversion in Stock Prices? A Reappraisal of the Empirical Evidence.
Kim, Myung Jig, (1991)