हिंदी

Determination of Equilibrium Income in the Short Run

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Estimated time: 6 minutes
CBSE: Class 12

Two-Stage Approach

  • In microeconomics, demand and supply curves simultaneously determine both equilibrium price and quantity in a single market.
  • In macroeconomics, equilibrium is determined in two stages:
  • Stage 1 - Price level is kept fixed and macroeconomic equilibrium is worked out.
  • Stage 2 - Price level is allowed to vary, and equilibrium is analysed again.
CBSE: Class 12

Reasons for Assuming a Fixed Price Level

Reason 1 - Unused Resources:

  • The economy has idle machineries, buildings, and labour.
  • Law of diminishing returns does not apply in this situation.
  • Additional output can be produced without increasing marginal cost.
  • Hence, price level does not vary even if quantity produced changes.

Reason 2 - Simplifying Assumption:

  • It is a deliberate simplification that will be relaxed later in the analysis.

CBSE: Class 12

Key Points: Determination of Equilibrium Income in the Short Run

  • Macroeconomic equilibrium is studied in two stages - fixed price first, variable price next.
  • Microeconomics determines price and quantity simultaneously; macroeconomics separates the two stages.
  • Fixed price is justified by the existence of unused resources in the economy.
  • With unused resources, marginal cost does not rise, so price stays constant despite output changes.
  • The fixed price assumption is temporary and will be dropped at Stage 2.
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