According to the law of variable proportions, the marginal product of an input initially rises and then after a certain level of employment, it starts falling. The MP curve therefore looks like:
According to the law of variable proportions, the marginal product of an input initially rises and then after a certain level of employment, it starts falling. The MP curve therefore looks like:
Solution
Option 1 -> A 'U' shaped curve falls first and then rises, which is opposite to the behavior of MP curve.
Option 2 -> Convex to origin does not correctly describe the shape of MP curve that rises first and then falls.
Option 3 -> An 'L' shaped curve shows a constant level followed by a sharp drop, not the gradual rise and fall pattern.
Option 4 -> Inverse 'U' shaped curve (like an upside-down U or ∩) perfectly represents a curve that first rises and then falls.
Hence, Inverse 'U' Shaped -> According to the law of variable proportions, when we increase one variable input while keeping others fixed, the marginal product initially increases due to better utilization of fixed factors (increasing returns). After reaching a maximum point, MP starts declining due to overcrowding of the variable factor relative to fixed factors (diminishing returns). This creates an inverted U-shaped curve (∩) where the MP rises to a peak and then falls, which is characteristic of the three stages of production. -> correct
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