Suppose that the employer is hiring workers in a perfectly competitive market where the market equilibrium wage is `$7`.
Graphing window shows horizontal axis: 0 to 14, vertical axis: 0 to 14. Start Graph, Color blue
x
y
0
8
1
6
2
4
3
2
4
-0
5
-2
6
-4
7
-6
Label "Labor (L)" at pixel coordinates (175,0).Label "Wage (w)" at pixel coordinates (0,170).Label "VMPL" at (1,8-1).
How many workers will be hired at this wage?
Find the wage on the vertical axis and read off the graph how many workers are available to work at that wage.
The table below shows data for the production of pizza rolls for an individual firm operating in an imperfectly competitive market.
Number of workers
Number of Jackets
Marginal Revenue
0
0
20
10
70
19
20
126
18
30
168
17
40
196
16
50
210
15
Given this data, complete the table:
Quantity of pizza rolls
Marginal Product of Labor (MPL)
Marginal Revenue Product of Labor (MRPL)
0
-
-
10
7
133
20
5.6
100.8
30
4.2
71.4
40
2.8
44.8
50
1.4
21
Marginal product is the additional output of one more worker. Mathematically, Marginal Product is the change in total product divided by the change in labor: MPL = ΔTP/ΔL. Marginal Revenue Product = MPL x MR.
Suppose that a firm has market power in their output market. Suppose that the employer is hiring workers in a perfectly competitive market where the market equilibrium wage is $.
The graph below shows the labor demand curve for this firm.
Note: VMPL stands for Value of the Marginal Product of Labor. MRPL stands for Marginal Revenue Product of Labor.
Graphing window shows horizontal axis: 0 to 30, vertical axis: 0 to 30. Start Graph, Color red
x
y
0
40
1
39
2
38
3
37
4
36
5
35
6
34
7
33
8
32
9
31
10
30
11
29
12
28
13
27
14
26
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25
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24
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23
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20
21
19
22
18
23
17
24
16
25
15
26
14
27
13
28
12
29
11
30
10
Start Graph, Color blue
x
y
0
40
1
38
2
36
3
34
4
32
5
30
6
28
7
26
8
24
9
22
10
20
11
18
12
16
13
14
14
12
15
10
16
8
17
6
18
4
19
2
20
0
21
-2
22
-4
23
-6
24
-8
25
-10
26
-12
27
-14
Start Graph, Color black
x
y
0
14
1
14
2
14
3
14
4
14
5
14
6
14
7
14
8
14
9
14
10
14
11
14
12
14
13
14
14
14
15
14
16
14
17
14
18
14
19
14
20
14
21
14
22
14
23
14
24
14
25
14
26
14
27
14
28
14
29
14
30
14
Label "Labor (L)" at pixel coordinates (175,0).Label "Wage (w)" at pixel coordinates (0,170).Label "VMPL" at (10,480/12-10). Label "MRPL" at (10,480/12-15).
What is the number of workers that this firm will hire if this firm is selling its output in an imperfectly competitive market?
13
For firms with market power in their output market, they choose the number of workers where the going market wage equals the firm's marginal revenue product.
Suppose that a firm DOES NOT have market power in their output market. Suppose that the employer is hiring workers in a perfectly competitive market where the market equilibrium wage is $14.
The graph below shows the labor demand curve for this firm.
Note: VMPL stands for Value of the Marginal Product of Labor. MRPL stands for Marginal Revenue Product of Labor.
Graphing window shows horizontal axis: 0 to 30, vertical axis: 0 to 30. Start Graph, Color red
x
y
0
33.333
1
32.333
2
31.333
3
30.333
4
29.333
5
28.333
6
27.333
7
26.333
8
25.333
9
24.333
10
23.333
11
22.333
12
21.333
13
20.333
14
19.333
15
18.333
16
17.333
17
16.333
18
15.333
19
14.333
20
13.333
21
12.333
22
11.333
23
10.333
24
9.333
25
8.333
26
7.333
27
6.333
28
5.333
29
4.333
30
3.333
Start Graph, Color blue
x
y
0
33.333
1
31.333
2
29.333
3
27.333
4
25.333
5
23.333
6
21.333
7
19.333
8
17.333
9
15.333
10
13.333
11
11.333
12
9.333
13
7.333
14
5.333
15
3.333
16
1.333
17
-0.667
18
-2.667
19
-4.667
20
-6.667
21
-8.667
22
-10.667
23
-12.667
24
-14.667
Start Graph, Color black
x
y
0
15
1
15
2
15
3
15
4
15
5
15
6
15
7
15
8
15
9
15
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15
11
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15
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14
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15
15
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15
21
15
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15
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25
15
26
15
27
15
28
15
29
15
30
15
Label "Labor (L)" at pixel coordinates (175,0).Label "Wage (w)" at pixel coordinates (0,170).Label "VMPL" at (10,400/12-10). Label "MRPL" at (10,400/12-15).
What is the number of workers that would be hired if this firm would be selling its output in a perfectly competitive market?
18.33
Note that since marginal revenue is less than price, the demand for labor for a firm which has market power in its output market is less than the demand for labor for a perfectly competitive firm. As a result, employment will be lower in an imperfectly competitive industry than in a perfectly competitive industry.
The graph below shows the supply and demand curves for labor in a perfectly competitive market.
Graphing window shows horizontal axis: 0 to 13, vertical axis: 0 to 13. Start Graph, Color red
x
y
0
6
1
7
2
8
3
9
4
10
5
11
6
12
7
13
8
14
9
15
10
16
11
17
12
18
13
19
Start Graph, Color blue
x
y
0
10
1
9
2
8
3
7
4
6
5
5
6
4
7
3
8
2
9
1
10
0
11
-1
12
-2
13
-3
Label "Labor (L) in thousands" at pixel coordinates (175,0).Label "Wage (w)" at pixel coordinates (0,170).Label "Demand" at (1,10+1). Label "Supply" at ((13-6)/ 1,11).
What is the equilibrium quantity of workers hired in this market?
thousand
2
The equilibrium in the labor market occurs at the intersection of the demand for labor and the supply of labor.
The graph below shows the supply and demand curves for labor in a perfectly competitive market.
Graphing window shows horizontal axis: 0 to 13, vertical axis: 0 to 13. Start Graph, Color red
x
y
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
8
10
9
11
10
12
11
13
12
14
13
15
Start Graph, Color blue
x
y
0
12
1
11
2
10
3
9
4
8
5
7
6
6
7
5
8
4
9
3
10
2
11
1
12
0
13
-1
Label "Labor (L) in thousands" at pixel coordinates (175,0).Label "Wage (w)" at pixel coordinates (0,170).Label "Demand" at (1,12+1). Label "Supply" at ((13-2)/ 1,11).
What is the equilibrium wage that will prevail in this market?
$
7
Equilibrium wage is where supply intersects demand curve.
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