Exit Ticket FRQ 1. Rostow's five-stage model of economic growth and the core-periphery concept of Wallerstein's three- part world system theory are two of the more common economic development models. A. Identify and compare one difference between the stages of economic growth and the core-periphery model. B. Use one of the two models to explain the level of economic development in either Mexico or Brazil. C. Give one example of how the core-periphery concept can be applied below the national scale