Table 1 shows the change in the total output of Company C as they increase the total number of workers. Referring to Table 1 below, where does diminishing marginal returns to labour set in? Table 1 Company C’s total output

Question

BlackTom AI · Accepted Answer

Marginal product of labour is the change in total output when one more worker is hired. To identify where diminishing marginal returns set in, compute the marginal product (MP) for each additional worker and see when MP begins to fall.

Given total output by number of workers:
- 1 worker → total output = 5
- 2 workers → total output = 11
- 3 workers → total output = 18
- 4 workers → total output = 29
- 5 workers → total output = 33

Calculate marginal product for each added worker (change in total output):
- MP of 1st worker = 5 − 0 = 5
- MP of 2nd worker = 11 − 5 = 6
- MP of 3rd worker = 18 − 11 = 7
- MP of 4th worker = 29 − 18 = 11
- MP of 5th worker = 33 − 29 = 4

List of MPs: 5, 6, 7, 11, 4. Notice MP is rising from the 1st through the 4th worker (5 → 6 → 7 → 11). Diminishing marginal returns occur when adding another worker causes the marginal product to decline. The first decline happens when the 5th worker is added: MP falls from 11 (4th worker) to 4 (5th worker). Therefore the diminishing marginal returns set in at the point the 5th worker is added (i.e., when moving from 4 to 5 workers).

Why the other options are incorrect:
- a (after the 1st): MP increases from 5 to 6 after the 2nd worker, so no diminishing returns there.
- d (after the 3rd): MP increases from 7 to 11 after the 4th worker, so still increasing.
- c (after the 4th): saying “after the 4th” could be interpreted as the decline occurs before adding the 5th; the decline actually occurs when the 5th is added, so the correct phrasing is that diminishing returns set in at the 5th worker.

Confirming the provided answer: b. After the 5th worker.

Table 1 shows the change in the total output of Company C as they increase the total number of workers. Referring to Table 1 below, where does diminishing marginal returns to labour set in? Table 1 Company C’s total output单项选择题

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