_________ says that the marginal product of a factor input initially rises with its employment level. But after reaching a certain level of employment, it starts falling.
In a market system, the central problems regarding how much and what to produce are solved through the coordination of economic activities brought about by ________ signals.
In the following square represents Dieticians, triangle represents Botanists, circle represents Psychologists and rectangle represents Indians. Which set of letters represents Psychologists who are not Indians?
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