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The following table represents the relationship between various levels of labor

ID: 1198197 • Letter: T

Question

The following table represents the relationship between various levels of labor input and corn output on a 3-acre plot of land: Is this table consistent with diminishing marginal productivity? If each day of labor costs the equivalent of 8 bushels of corn, calculate the maximum rental value (in bushels of corn) of the 3 acres of land per season. At what wage rate, in terms of corn, would the land have no rental value? Assuming constant returns to scale, calculate the marginal product of one acre of land, when 20 labor-days are being used to produce 366 bushels of corn.

Explanation / Answer

Labour days per season

Bushels of corn per season

Marginal productivity of labour

13

254

-

14

278

24

15

300

22

16

320

20

17

336

16

18

348

12

19

358

10

20

366

8

21

372

6

22

376

4

The marginal productivity is calculated by finding the change in Bushels of corn produced per season to the change in labour days per season.

(a) As the table shows, the marginal productivity keeps on diminishing as more and more labour days per season are employed. This means it is consistent with diminishing marginal productivity.

(b) Cost of labour per day = 8 Bushels of corn

The labour will be employed upto that point where the cost of labour is equal to its marinal productivity. The marginal productivity is equal to 8 at 20 labour days. So, the maximum rental value of the 3 acres of land per season is:

20 * 8 = 160 Bushels of corn

(c) At the wage rate higher than 8 bushels of corn, further employment of labour will result in lesser marginal productivity than the wage.

(d) When 20 labour day are used to produce 366 bushels of corn, the marginal product of 3 acres of land is 8. Assuming constant returns to scale, marginal product of one acre of land will be the same.

Labour days per season

Bushels of corn per season

Marginal productivity of labour

13

254

-

14

278

24

15

300

22

16

320

20

17

336

16

18

348

12

19

358

10

20

366

8

21

372

6

22

376

4

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