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Robert Luskin's article in this issue provides a useful service by appropriately qualifying several points I made in my 1986 American Journal of Political Science article. Whereas I focused on how to avoid common mistakes in quantitative political science, Luskin clarifies ways to extract some useful information from usually problematic statistics: correlation coefficients, standardized coefficients, and especially RZ. Since these three statistics are very closely related (and indeeddoi:10.2307/2111506 fatcat:6ixxgykonzbuhcn7ebhxkttboa