Exact Tests for the Weak Causal Null Hypothesis on a Binary Outcome in Randomized Trials

@inproceedings{Chiba2015ExactTF,
title={Exact Tests for the Weak Causal Null Hypothesis on a Binary Outcome in Randomized Trials},
author={Yasutaka Chiba},
year={2015}
}

There are two principal exact tests for evaluation of data in two-by-two contingency tables: the tests of Fisher and Barnard. The latter cannot be a hypothesis test for the causal null hypothesis unless exchangeability can be assumed. Fisher’s exact test is a hypothesis test for the sharp causal null hypothesis (i.e., that there is no effect for all individuals), but not for the weak causal null hypothesis (i.e., that the true risk difference is zero). Rejection of the sharp causal null… CONTINUE READING