In several recent papers, the writer has discussed the use of Simon’s method for making causal inferences from correlational data. 1 Simon’s method yields results that are consistent with those obtained through partial correlations, but it also forces one to make explicit assumptions about both outside disturbing influences and the nature of the various causal links among an entire set of variables. It thereby serves to keep our attention focused on the complete network of causal relationships rather than on a single dependent variable.