Today is a special day for all researchers and practitioners of economics, especially development and international economics. The new version (v8) of the Penn World Tables (PWT) has been released. The PWT revolutionized, actually by making possible, research on economic development, especially to answer questions that needed cross-country comparisons. The PWT provided the basic data and purchasing power parity (PPP)-based estimates of key economic variables that allowed a number of important questions in development to be examined. For this reason alone, the efforts of the PWT’s founders—Alan Heston, Irving Kravis, and Robert Summers (the latter two are now deceased)—would be Nobel-worthy.