E Editors’ Introduction and Summary of the Brookings Papers on Economic Activity – 1973 No 2 Arthur M. Okun and George L. Perry 1973, No. 2
R Responsiveness of the Federal Individual Income Tax to Changes in Income Joseph A. Pechman 1973, No. 2
R Rational Expectations, the Real Rate of Interest, and the Natural Rate of Unemployment Thomas J. Sargent 1973, No. 2