The Publication of Enduring Quality (PEQ) award of the Association of Environmental and Resource Economists (AERE) recognizes works that are of seminal nature and with enduring value in environmental and resource economics. This year, AERE recognized two influential empirical papers on induced innovation in environmental economics: "The Induced Innovation Hypothesis and Energy-Saving Technological Change," by Richard G. Newell, Adam B. Jaffe, and Robert N. Stavins, Quarterly Journal of Economics, Vol. 114, No. 3 (1999), pp. 941–975; and "Induced Innovation and Energy Prices," by David Popp, American Economic Review, Vol. 92, No. 1 (2002), pp. 160–180.