Bugni, Federico A.; Canay, Ivan A.; Shaikh, Azeem M. - 2016
-adaptive randomization. Here, by covariate-adaptive randomization, we mean randomization schemes that first stratify according to baseline …, Efron's biased-coin design and stratified block randomization. When testing the null hypothesis that the average treatment … under the null hypothesis equals the nominal level for a wide variety of randomization schemes. The modified version of the …