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December 13, 2025 

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MARGINAL EFFICIENCY OF INVESTMENT: The anticipated rate of return on a capital investment project undertaken by a business firm. Businesses typically compare the marginal efficiency of investment, abbreviated MEI, on physical capital with interest rate returns on financial capital when deciding to undertake an investment project. Because different investment projects have different returns, businesses often have a range of alternatives projects from which to choose. Combining all projects throughout the economy gives rise to an investment demand curve relating investment expenditures to the interest rate.

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UNION SHOP: An employment arrangement, usually written into a collective bargaining agreement, in which a firm is free to hire both union and nonunion employees, with the stipulation that workers must join the union once hired. Union shops became a popular method of gaining control over the labor services when closed shops were outlawed by the Taft-Hartley Act passed in 1947. Those states with right-to-work laws effectively outlaw union shops. The alternative to a union shop is an open shop.

     See also | labor union | closed shop | union shop | right to work | collective bargaining | supply to a firm | Taft-Hartley Act | factor market | monopoly | market control | yellow-dog contract |


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CONSUMER PRICE INDEX FOR ALL URBAN CONSUMERS

An index of prices of goods and services typically purchased by urban consumers. The Consumer Price Index for All Urban Consumers (CPI-U) is the official name for the Consumer Price Index (CPI) commonly reported in the media. It is compiled and published monthly by the Bureau of Labor Statistics (BLS), using price data obtained from an elaborate survey of 25,000 retail outlets and quantity data generated by the Consumer Expenditures Survey. The CPI-U is so designated to differentiate it from the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W).

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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a coffee cup commemorating the 2000 Olympics or a birthday gift for your grandmother. Be on the lookout for strangers with large satchels of used undergarments.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
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