We derive a new matrix statistic for the Hausman test for endogeneity in cross-sectional Instrumental Variables … statistic from the augmented regression setup that is often used for the endogeneity test, and we find that the choice between … situations. We find that the test statistic performs well as regards empirical size in almost all cases; however, as regards …

endogeneity and attrition/non-response bias, using two instrumental variables. Making use of a discrete instrument for the … as the total population and suggest non- and semiparametric estimators. We apply the latter to a randomized experiment at …

. This is done with randomly assigned lottery numbers, nonlottery tie-breakers like test scores, or both. The New York City … public high school match illustrates the latter, using test scores, grades, and interviews to rank applicants to screened …

experiment has been affected by randomisation per se. We illustrate how this has happened in the case of the UK Employment … Retention and Advancement (ERA) experiment, in which over one quarter of the eligible population was not represented. Our … part remains testable under the experiment even in the presence of randomisation bias, and offers a way to correct the non …

individuals might react to the randomisation itself, thereby rendering the causal inference from the experiment irrelevant for …", and provide what is to our knowledge the first empirical evidence on this form of bias in an actual social experiment, the … UK Employment Retention and Advancement (ERA) study. Specifically, we empirically test the extent to which random …

model averaging as a statistical decision problem in a limit experiment, and derive an averaging scheme that is Bayes …

potential outcomes, namely that potential outcomes are mutually stochastically increasing. We show how to test the empirical …