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An economic model is a theoretical construct representing economic processes by a set of variables and a set of logical and/or quantitative relationships between them. The economic model is a simplified, often mathematical, framework designed to illustrate complex processes. Frequently, economic models posit structural parameters. [1]
For example, in public finance the Robinson Crusoe economy is used to study the various types of public goods and certain aspects of collective benefits. [2] It is used in growth economics to develop growth models for underdeveloped or developing countries to embark upon a steady growth path using techniques of savings and investment.
Most economic models rest on a number of assumptions that are not entirely realistic. For example, agents are often assumed to have perfect information, and markets are often assumed to clear without friction. Or, the model may omit issues that are important to the question being considered, such as externalities. Any analysis of the results of ...
The Solow–Swan model worked out by Robert Solow and, independently, Trevor Swan in the 1950s achieved more long-lasting success, however, and is still today a common textbook model for explaining economic growth in the long-run. [32] The model operates with a production function where national output is the product of two inputs: capital and ...
An economic system, or economic order, [1] is a system of production, resource allocation and distribution of goods and services within a society. It includes the combination of the various institutions , agencies, entities, decision-making processes, and patterns of consumption that comprise the economic structure of a given community.
The economic model of supply and demand states that the price P of a product is determined by a balance between production at each price (supply S) and the desires of those with purchasing power at each price (demand D): the diagram shows a positive shift in demand from D 1 to D 2, resulting in an increase in price (P) and quantity sold (Q) of ...
The great appeal of mathematical economics is that it brings a degree of rigor to economic thinking, particularly around charged political topics. For example, during the discussion of the efficacy of a corporate tax cut for increasing the wages of workers, a simple mathematical model proved beneficial to understanding the issues at hand.
An econometric model specifies the statistical relationship that is believed to hold between the various economic quantities pertaining to a particular economic phenomenon. An econometric model can be derived from a deterministic economic model by allowing for uncertainty, or from an economic model which itself is stochastic. However, it is ...