In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Lawrence Henderson established a group named for this man at Harvard University in 1932, which counted George Homans and Talcott Parsons among its members, while M. J. Farrell developed a principle of data analysis that is named for this man and Tjalling Koopmans. The first theorem of welfare guarantees that every competitive equilibrium outcome will satisfy the condition named for him, and a more generic interpretation of that condition, which factors in compensation between parties, is named for Hicks and Kaldor. A rule which states that 80% of the effects can be attributed to 20% of the causes is known as his "80-20" principle. For 10 points, identify this economist, the author of Mind and Society who lends his names to a condition where no agent can be made better off without making another agent worse off.
Social Science