UNITED MINE WORKERS UNION: A labor union representing the interests of workers engaged in mineral extraction, especially coal. The United Mine Workers Union has been one of the more prominent unions involved in the labor union movement. It is also notable as being the first national industrial union established in the United States, when it was formed in 1890. Prior to that time all national unions were craft unions representing workers with specific skills or in specific occupations. The United Mine Workers Union representing all workers employed by mining companies regardless of skills or occupations.

     See also | labor union | industrial union | craft union | organized labor | minimum wage | strike | labor union movement | AFL-CIO |

UNITED MINE WORKERS UNION, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: October 16, 2024].

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Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.

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Today, you are likely to spend a great deal of time searching the newspaper want ads trying 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 florescent light bulbs that hum folk songs from the sixties.
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