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Jacket
Economics, 7/e
David Begg, Birkbeck College, University of London
Rudiger Dornbusch
Stanley Fischer

Costs and supply

Self-test Questions

Select the radio button corresponding to your choice of answer for each question, and then click on "Submit Answers" to find out how many you answered correctly.

1

The production function in economics is
A)the activity of production
B)the set of all technically efficient techniques
C)a way of converting factors of production into products
D)the ability to make more output by using more inputs
2

A production technique is technically efficient if
A)output is maximised
B)inputs are minimised
C)there is no way to make a given output using less of one input and no more of the other inputs
D)costs are minimised
3

Decreasing returns to scale means that ___________ as ______________
A)short run marginal costs rises, output rises
B)long run marginal cost rises, output rises
C)short run average cost rises, output rises
D)long run average cost rises, output rises
4

If a long run average cost curve is falling from left to right this is an example of
A)increasing returns to scale
B)decreasing returns to scale
C)constant returns to scale
D)the minimum efficient scale
5

When average cost is falling marginal cost is __________ and when average cost is rising marginal cost is __________
A)greater than average cost, greater than average cost
B)less than average cost, greater than average cost
C)less than average cost, less than average cost
D)greater than average cost, less than average cost
6

The firms long run output decision will be where
A)long run average cost is lowest
B)marginal revenue equals output
C)marginal revenue equals long run marginal cost
D)marginal cost equals output
7

Short run average total costs are equal to the sum of _________ and __________
A)short run opportunity costs, profit
B)short run variable costs, profit
C)short run average variable costs, profit
D)short run average variable costs, short run average fixed costs
8

The short run marginal cost curve cuts the short run total cost curve and short run average variable cost curve ______________
A)at their lowest points
B)when they are declining
C)when they are increasing
D)when marginal revenue is zero
9

Holding all factors constant except one and increasing a variable factor is expected to lead to steadily decreasing marginal product of that factor. This is an example of
A)decreasing returns to scale
B)the law of diminishing returns
C)constant returns to scale
D)an inefficient production technique
10

In the short run a firm will produce zero output if __________
A)price is greater than short run average total cost
B)price is between short run average total cost and short run average variable cost
C)price is less than short run average variable cost
D)profit is zero
11

A period of time long enough for the firm to adjust all production inputs is described as the long run
A)TRUE
B)FALSE
12

Given a long run average cost curve, every point represents a tangency with the lowest point of a short run average cost curve for a fixed plant size
A)TRUE
B)FALSE