The parallel existence and mutual interaction of "state" and "market" in the modern world create "political economy"; without both state and market there could be no political economy.
Robert GilpinOne reason for the primacy of the market in shaping the modern world is that it forces a reorganization of society in order to make the market work properly . When a market comes into existence, as Marx fully appreciated, it becomes a potent force driving social change.
Robert GilpinThe clustering of technological innovation in time and space helps explain both the uneven growth among nations and the rise and decline of hegemonic powers.
Robert GilpinIn the abstract world of American economists, equations run both ways; they believe that by changing the sign of a variable from plus to minus or from minus to plus or the price and quantity of x or y, the direction of historical movement can be reversed.
Robert Gilpin