The document outlines the core-periphery model which distinguishes between core and peripheral regions. Core regions are described as urbanized, industrialized areas with high wages, large markets, skilled labor, and infrastructure investment. Peripheral regions, in contrast, are depicted as having unemployment, poor infrastructure, unskilled and uneducated workforces, lack of investment, and low wages. The core-periphery model examines how economic activity concentrates in core regions due to agglomeration, cumulative causation, and multiplier effects.