Question: Which American economist, winner of the 1976 Nobel Memorial Prize in Economic Sciences, wrote the introduction for the 1996 reprint of "I, Pencil"?
Sentence (from "Paul Krugman"): The Prize Committee cited Krugman's work explaining the patterns of international trade and the geographic distribution of economic activity, by examining the effects of economies of scale and of consumer preferences for diverse goods and services.
Relevant evidence: No