Instructions: 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.
Input: This object was generalized as the triangle model by Robert J. Gordan. Irving Fisher claimed to have discovered it and Edmund Phelps formulated the expectations-augmented form of it. NAIRU theory holds that the long-term one is a vertical line. Milton Friedman attacked it during the 1970s, citing an increase in both of its variables, known as stagflation. For ten points, name this curve developed by a New Zealand-born economist that posited an inverse relationship between unemployment and inflation.
Output:
Social Science