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PARETO EFFICIENCY: A type of efficiency that results if one person can not be made better off without making someone else worse off. Named after Vilfredo Pareto, this criterion is the guiding theoretical notion of efficiency used in the study of economics, especially welfare economics. Pareto efficiency is generally not attained if some resources are idle or unemployed. By engaging idle resources in production, some people can have more production without reducing that available to others. A problem with Pareto efficiency, however, is that it is based on the existing distribution of income and wealth. This is one of two noted efficiency criteria used in economics. The other is Kaldor-Hicks efficiency.

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FOUR-SECTOR KEYNESIAN MODEL

A Keynesian model of the macroeconomy that includes all four macroeconomic sectors, the household sector, the business sector, the government sector, and the foreign sector. This Keynesian model variation adds the foreign to the three domestic sectors (household, business, and government) in the three-sector model. This model provides the complete Keynesian representation of the macroeconomy, including the export-import interaction between the domestic economy and the foreign sector. Equilibrium is identified as the intersection between the C + I + G + (X - M) line and the 45-degree line. Two related variations are the two-sector Keynesian model and the three-sector Keynesian model.

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Today, you are likely to spend a great deal of time browsing about a thrift store seeking to buy either a birthday greeting card for your father or a T-shirt commemorating the first day of spring. Be on the lookout for high interest rates.
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The average bank teller loses about $250 every year.
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