Causality, Causal Inference, Philosophy Of Science, Ethical Ai, Mediation Analysis.
product-of-coefficients will always be equal. This follows from the fact that the regressional image of (1), R_YX − R_YX·Z = R_ZX*R_YZ·X, is a universal identity among regression coefficients of any three variables, and has nothing to do with causation or mediation. It will continue to hold