ECON1131 Chapter Notes - Chapter 11: Average Cost, Average Variable Cost, Marginal Cost

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viridiancamel50

28 Mar 2017

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Production function: describes relationship between q produced and inputs used. Fixed inputs: inputs whose quantity is fixed for a period of time and cannot be varied. Variable inputs: can vary at any time. Long-run: firms have enough time to adjust inputs. Short-run: at least one of the inputs is fixed. Total product function: short run version of production function. Total product curve: shows relationship between quantity produced and quantity of input used for a given amount of fixed input. Marginal product: slope of total product curve, Mpl = change in quantity / change labor. Decreasing mpl (diminishing returns to labor): because more workers have to work in the same limited space with the same limited amount of equipment. Pretty much when having more workers or something else stops being useful because there isn"t enough workspace. Fixed cost: amount paid for fixed inputs. Variable input: amount paid for variable cost. Total cost: sum of vc and fc.

Related Questions

1. The slope of the total product curve measures

a. the marginal rate of technical substitution.

b. marginal product.

c. average product.

d. the maximum average product.

e. minimum product.

2. The Law of Diminishing Returns to a variable input (such as labor) assumes that

a. there is at least one fixed input.

b. all inputs are changed by the same percentage.

c. the firm is operating in the short run.

d. all inputs are held constant.

e. a and c.

3. An isoquant curve identifies

a. the maximum output possible, given a fixed budget.

b. the different combinations of goods the can be produced, given fixed amounts of inputs.

c. the different combinations of inputs that can be used to produce a fixed rate of output.

d. none of the above.

4. The ratio of total productivity to the total quantity of a variable input being used in production is

a. equal to marginal physical productivity of the input.

b. constant as employment levels of the input vary.

c. equal to average physical productivity of the input.

d. equal to the marginal rate of technical substitution.

1. Theoretically, in a long-run cost function:

a. all inputs are fixed

b. all inputs are considered variable

c. some inputs are always fixed

d. capital and labor are always combined in fixed proportions

2. The short-run cost function is:

a. where all inputs to the production process are variable

b. relevant to decisions in which one or more inputs to the production process are fixed

c. not relevant to optimal pricing and production output decisions

d. crucial in making optimal investment decisions in new production facilities

3. Break-even analysis usually assumes all of the following except:

a. in the short run, there is no distinction between variable and fixed costs.

b. revenue and cost curves are straight-lines throughout the analysis.

c. there appears to be perfect competition since the price is considered to remain the same regardless of quantity

d. the straight-line cost curve implies that marginal cost is constant.

maroonllama628

The following table summarizes the short-run production function for your firm. Your product sells for $10 per unit, labor costs $40per unit, and the rental price of capital is $10 per unit. Complete the following table, and then answer the accompanying questions.

L K Q MPL APL APK VMPL
0 5 0
1 5 20
2 5 60
3 5 120
4 5 160
5 5 180
6 5 190
7 5 190
8 5 180
9 5 160
10 5 120
11 5 60

(a) Which inputs are fixed inputs? Which are the variable inputs?

(b) How much are your fixed costs?

(c) What is the variable cost of producing 40 units of output?

(d) How many units of the variable input should be used to maximize profits?

(e) What are your maximum profits?

(f) Over what range of variable input usage does increase marginal returns exist?

(g) Over what range of variable input usage do decrease marginal returns exist?

(h) Over what range of variable input usage do negative marginal returns exist?

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ECON1131 Chapter Notes - Chapter 11: Average Cost, Average Variable Cost, Marginal Cost

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