In economics, marginal cost is the change in the total cost that arises when the quantity produced is incremented by one unit. That is, it is the cost of producing one more unit of a good.In general terms, marginal cost at each level of production includes any additional costs required to produce the next unit.hat is, it is the cost of producing one more unit of a good. In general terms, marginal cost at each level of production includes any additional costs required to produce the next unit.
Economic expansion. An economic expansion is an increase in the level of economic activity, and of the goods and services available. It is a period of economic growth as measured by a rise in real GDP. The explanation of such fluctuations in aggregate economic activity is one of the primary concerns of macroeconomics. Typically an economic expansion is marked by an upturn in production and utilization of resources. Economic recovery and prosperity are two successive phases of expansion.
Theory developed by Immanuel Wallerstein that explains the emergence of a core, periphery, and semi periphery in terms of economic and political connections first established at the beginning of exploration in the late 15th century and maintained through increased economic access up until the present.ertiary Economic Activities. Activities that provide the market exchange of goods and that bring together consumers and providers of services such as retail, transportation, government, personal, and professional services.