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PERFECT COMPETITION AND EFFICIENCY: Perfect competition is the idealized market structure that achieves an efficient allocation of resources. The conditions of perfect competition, including (1) large number of small firms, (2) identical products sold by all firms, (3) freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology, ensure that perfect competition efficiently allocates resources. This is in fact the purpose of perfect competition: a market structure that illustrates perfection, the best of all possible resource allocation worlds. The real world falls short of this perfection.

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REFERENCE WEEK, CURRENT POPULATION SURVEY

The calendar week (Sunday through Saturday) containing the 12th day of the month, which is used in the Current Population Survey (CPS) as the time period for documenting the employment and labor force status of respondents. The estimation of the unemployment rate and other employment information generated by the CPS are based on activities of survey respondents during this week. The actual survey is conducted by interviewers working for the Bureau of the Census during the calendar week containing the 19th day, which is termed the survey week.

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Today, you are likely to spend a great deal of time looking for a downtown retail store wanting to buy either a cell phone case or a pair of designer sunglasses. Be on the lookout for pencil sharpeners with an attitude.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
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