1. Darby, Michael R., Angelo R. Mascaro, and Michael L. Marlow. 1989. “The Empirical Reliability of Monetary Aggregates as Indicators: 1983–1987.” Economic Inquiry 27: 555–585.
2. Friedman, Milton. 1953. “The Effects of a Full-Employment Policy on Economic Stability: A Formal Analysis.” In Essays in Positive Economics. Chicago: University of Chicago Press.