According to realists, order in international relations can be achieved through

A major goal of experimental design is to

A) increase internal validity by increasing degrees of freedom. B) increase internal validity by decreasing degrees of freedom. C) decrease internal validity by controlling variance. D) increase internal validity by controlling variance.

Frank Levy's analysis of the changing income distribution concluded that since 1973, most people's living standards have:

A. declined. B. improved. C. stayed about the same. D. none of the above