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MARGINAL REVENUE PRODUCT AND FACTOR DEMAND: A perfectly competitive firm's factor demand curve is that negatively-sloped portion of its marginal revenue product curve. A perfectly competitive firm maximizes profit by hiring the quantity of input that equates factor price and marginal revenue product. As such, the firm moves along its negatively-sloped marginal revenue product curve in response to changing factor prices.

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INFERIOR GOOD: A good for which an increase in income causes a decrease in demand, or a leftward shift in the demand curve. If demand decreases as income increases, it is an inferior good, or a good with a negative income elasticity of demand. An inferior good is one of two alternatives falling within the income determinant of demand. The other is a normal good.

     See also | good | income | demand | demand curve | income, demand determinant | income elasticity of demand | normal good |


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INFERIOR GOOD, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: July 10, 2026].


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HYPOTHESIS

A reasonable proposition about the workings of the world that is inspired or implied by a theory and which may or may not be true. A hypothesis is essentially a prediction made by a theory that can be compared with observations in the real world. A hypothesis usually takes the form: "If A, then also B." The essence of the scientific method is to test, or verify, hypotheses against real world data. If supported by data over and over again, a hypothesis becomes a principle.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either a handcrafted spice rack or a cell phone case. Be on the lookout for mail order catalogs with hidden messages.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
"Lord, where we are wrong, make us willing to change; where we are right, make us easy to live with. "

-- Peter Marshall, US Senate chaplain

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