WaldWald estimatorWald statisticWald statistics
In statistics, the Wald test (named after Abraham Wald) assesses constraints on statistical parameters based on the weighted distance between the unrestricted estimate and its hypothesized value under the null hypothesis, where the weight is the precision of the estimate.wikipedia
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AngristJoshua D. Angrist
For instance, Angrist developed a two-stage least squares (2SLS) equivalent of the efficient Wald estimator.
OLSleast squaresOrdinary least squares regression
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The F-test is a Wald test.
chi-square testchi-squared statisticChi-squared