in an interview with The Wall Street Journal on January 12, that during the tenure of Chile's socialist President Michelle Bachelet from 2014 onwards, Chile's ranking for ease of doing business had been downgraded by the World Bank as a result of changes of methodology which he claimed may have been politically motivated, a claim denied by the former World Bank economist responsible for compiling Chile's ranking, Chilean economist Augusto Lopez-Claros. Nobel Memorial Prize in Economics Romer shared the 2018 Prize with William Nordhaus. In choosing Romer as one of the 2018 economics laureates, the Royal Swedish Academy of Sciences stated that he had shown "how knowledge can function as a driver of long-term economic growth. . . . [Prior macroeconomic studies] had not modelled how economic decisions and market conditions determine the creation of new technologies. Paul Romer solved this problem by demonstrating how economic forces govern the willingness of firms to produce new ideas and innovations." After receiving the prize, Romer described how he started thinking about the relationship between growth and innovation: "The question that I first asked was, why was progress . . . speeding up over time? It arises because of this special characteristic of an idea, which is if [a million people try] to discover something, if any one person finds it, everybody can use the idea." The same day he received the award, Romer married Caroline Weber, a professor of French Literature at Barnard College. Publications "Growth Cycles", with George Evans and Seppo Honkapohja (American Economic Review, June 1998). "Preferences, Promises, and the Politics of Entitlement" (Individual and Social Responsibility: Child Care, Education, Medical Care, and Long-Term Care in America, Victor R. Fuchs (ed.), Chicago: University of Chicago Press, 1995). "New Goods, Old Theory, and the Welfare Costs of Trade Restrictions," Journal of Development Economics, No. 43 (1994), pp. 5–38. "Looting: The Economic Underworld of Bankruptcy for Profit" with George Akerlof (Brookings Papers on Economic Activity 2, William C. Brainard and George L. Perry (eds.), 1993, pp. 1–74). "Economic Integration and Endogenous Growth," with Luis Rivera-Batiz (Quarterly Journal of Economics CVI, May 1991, pp. 531–55). "Endogenous Technological Change" (Journal of Political Economy, October 1990). "Increasing Returns and Long Run Growth" (Journal of Political Economy, October 1986). "Cake Eating, Chattering and Jumps: Existence Results for Variational Problems" (Econometrica 54, July 1986, pp. 897–908). See also Endogenous growth theory Good governance Special economic zone Mathiness