Note to players: specific terms required. These two terms name John Friedmann's model of polarized urban development. Samir Amin's concept of “delinking” calls for separating the economies of concepts described (15[1])by these two (15[1])terms. (15[1]-5[1])Paul Krugman (-5[1])used these two terms to describe differentiated (15[1])sectors (15[1])of a country in the paper (15[1])“Increasing Returns and Economic Geography.” A (15[1])“semi-” version of one of these two concepts (15[1])is added (15[2])in (*) world-systems (15[1])theory. (10[2])The existence (10[2])of (10[2])an exploitative (10[1])relationship (10[1])between these two (10[1]-5[1])regions (10[1])is the common extension of the (10[1])Prebisch-Singer (10[1])thesis and is the central contention of dependency theory. For 10 points, name these two conceptual (10[1])regions in international political economy, one of which is wealthy and central, (-5[1])the other impoverished (10[1])and fringe. ■END■ (10[2]0[2])