Task: Text Categorization
Input (English): 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 (English): Social Science