Note to players: specific terms required. These two terms name John Friedmann's model of polarized urban development. (15[1])Samir Amin's (15[1])concept of “delinking” calls for separating the economies of concepts described by these two terms. (15[1]-5[1])Paul (15[1])Krugman used these (15[1])two terms to describe differentiated (15[1])sectors (15[1])of a country in the paper “Increasing Returns and Economic Geography.” A (15[1])“semi-” version of one of these two concepts (15[1])is (15[1])added in (*) world-systems theory. (10[1])The (-5[1])existence of (10[1])an exploitative relationship between these two (10[2])regions is (10[1])the common (10[5]-5[1])extension of the (10[1])Prebisch-Singer (10[2])thesis and is (10[1])the central contention of (10[1])dependency theory. For 10 points, name these two conceptual regions in (10[1])international political economy, one (10[1])of which is wealthy and central, the other impoverished and fringe. ■END■ (10[1])