Class 12 Micro Economics - Chapter Production and Costs NCERT Solutions | What does the average fixed cost curve l

Welcome to the NCERT Solutions for Class 12th Micro Economics - Chapter Production and Costs. This page offers a step-by-step solution to the specific question from Excercise ".$ex_no." , Question 17: what does the average fixed cost curve look like....
Question 17

What does the average fixed cost curve look like? Why does it look so? 

Answer

The short run marginal cost (SMC), average variable cost (AVC) and short run average cost (SAC) curves are all U-shaped curves. The reason behind the curves being U-shaped is the law of variable proportion. In the initial stages of production in the short run, due to increasing returns to labour, all the costs (average and marginal) fall. In addition to this in the short run MP of labour also increases, which implies that more output can be produced by per additional unit of labour, leading all the costs curves to fall. Subsequently with the advent of constant returns to labour, the cost curves become constant and reach their minimum point (representing the optimum combination of capital and labour). Beyond this optimum combination, additional units of labour increase the cost, and as MP of labour starts falling, the cost curve starts rising due to decreasing returns to labour.

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