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PREPARED BY :. RAMESH CHAND TAK. PGT : ECONOMICS. KENDRIYA VIDYALAYA (GAIL)JHABUA(M.P.). The Law o f Variable Proportion.
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PREPARED BY : RAMESH CHAND TAK PGT : ECONOMICS KENDRIYA VIDYALAYA (GAIL)JHABUA(M.P.) R. C. TAK
The Law of Variable Proportion R. C. TAK
Law of variable proportion states that as more and more of the variable factor is combined with the fixed factor; a stage must ultimately come when marginal product of the variable factor starts declining. R. C. TAK
Assumption 1. One Factor input is variable 2. All other factors are fixed 3. It is a short period production function4.Units of variable factor are homogeneous.5.Technique of production does not change during production. R. C. TAK
I Stage of Increasing Returns ,MP↑ Diminishing MP • Negative MP R. C. TAK
1stStage (Increasing returns to a factor) • TP: Increase with increasing rate • MP: Increases • AP: Increases Reasons for increasing returns to a factor • Better utilization of fixed factor • Increase in efficiency of variable factor. • Optimum combination of factors R. C. TAK
2nd Stage (Diminishing returns to a factor) • TP: Increase with decreasing rate • MP: Decreases • AP : Become constant and then decreases Reasons for diminishing returns to a factor • Indivisibility of factors. • Imperfect substitutes. R. C. TAK
3rd Stage (Negative returns to a factor) • TP :Decreases • MP : Decreases and becomes negative • AP : Decreases Reasons for negative returns to a factor • Limitation of fixed factors • Poor coordination between variable and fixed factor • Decrease in efficiency of variable factors. R. C. TAK
Relationship Between TP & MP • When Total product increases at an increasing rate, marginal product also increases • When total product increases at a diminishing rate, marginal product declines. • When total product reaches its maximum, marginal product becomes zero. • When total product falls, marginal product becomes negative R. C. TAK
Relationship Between AP & MP • When MP is greater than the AP, the AP rises. • When MP becomes equal to AP, then AP reaches its maximum • When MP is less than the AP, then AP starts declining. R. C. TAK
Know yourself: 1. When total product of a variable factor falls what will happen to its marginal product? 2. State whether the following statement is true or false. Give reason for your answer “Total product always increase whether there is increasing returns or diminishing returns to a factor.” 3. Assuming a fixed factor and a variable factor draw up total product, average product and marginal product curves with their typical shapes in a single diagram. Divide the diagram into three regions showing different stages about the behaviours of output. 4. Explain the law of returns to a factor with the help of total product and marginal product schedule. 5.Explain the relationship between (A) TP & MP (B) AP & MP R. C. TAK
Reference:- 1. NCERT Text Book-Introductory Micro-Economics. 2. Introduction to Micro economic theory - H.L. Ahuja 3. Introductory Micro economics - Dr. B.L. Gupta R. C. TAK