Combinatorial

*meta*-*analysis*(CMA) is the study of the behaviour of statistical properties of combinations of studies from a meta-analytic dataset (typically in social science research). In an article that develops the notion of "gravity" in the context of*meta*-*analysis*, Dr. Travis Gee proposed that the jackknife methods applied to*meta*-*analysis*in that article could be extended to examine all possible combinations of studies (where practical) or random subsets of studies (where the combinatorics of the situation made it computationally infeasible). In the original article, k objects (studies) are combined k-1 at a time (jackknife estimation), resulting in k estimates.