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Chapter 11
Behind the Supply Curve: Inputs and Costs
| Term | Definition |
|---|---|
| Production | process of turning inputs into outputs |
| Production Function | relationship between the quantity of inputs a firm uses and the quantity of output it produces |
| Fixed input | an input whose quantity is fixed for a period and cannot be varied |
| Variable input | an input whose quantity the firm can vary at any time |
| Short run | period in which at least one input is fixed |
| Long run | period in which all inputs can be varied |
| Total Product curve | shows how the quantity of output depends on the quantity of the variable input for a given quantity of the fixed input |
| Marginal Product | change in output resulting from one-unit increase in the amount of labor input ( change in Q/ change in L) |
| Fixed cost | cost that does not depend on the quantity of output produced/cost of fixed input |
| Variable cost | cost that depends on the quantity of output produced/ cost of the variable input |
| Total cost | sum of fixed cost and variable cost -TC curve becomes steeper as more output is produced, a result of diminishing returns |
| Marginal cost | change in total cost generated by one additional unit of output MC= change in TC/change in Q |
| Average Total Cost | ATC= TC/Q |
| Average fixed cost | ATC= FC/Q |
| Average variable cost | ATC= VC/Q |
| The spreading effect | the larger the output, the more output over which fixed cost is spread, leading to lower average fixed cost |
| The diminishing returns effect | The larger the output, the more variable input required to produce additional units, which leads to higher average variable cost |
| Marginal cost is ___________ sloping because of diminishing returns | upward |
| Average variable cost is ______ sloping but is _______ than marginal cost curve | upward; flatter |
| Average fixed cost is _______ sloping because of the spreading effect | downward |
| The marginal cost curve intersects the average total cost curve from below, crossing it at its _________ point | lowest |