हिंदी
CISCEISC (Commerce) Class 12
प्रश्न पत्र३५४
पाठ्यपुस्तक उत्तर१८२१८
महत्वपूर्ण प्रश्न एवं उत्तर५६८४
अवधारणा स्पष्टीकरण और वीडियो६०५
समय सारणी१५
पाठ्यक्रम

Importance of Effective Demand

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Topics

Estimated time: 24 minutes
  • Determines level of employment
  • Rejection of Say’s Law
  • Refutes Pigou’s wage‑cut argument
  • Highlights the importance of investment
  • Emphasis on the demand side (short run)
  • Explains the paradox of poverty amidst plenty
  • Real-Life Application
  • Key Points: Importance of Effective Demand
CISCE: Class 12

Determines level of employment

  • Effective demand is the total demand for goods and services in the economy that is backed by ability to pay.
  • Firms produce and hire workers according to this demand. When effective demand is high, firms increase production and employ more workers.
  • When effective demand is low, firms cut production and reduce employment. Therefore, unemployment in a capitalist economy mainly arises due to deficiency of effective demand.
CISCE: Class 12

Rejection of Say’s Law

  • Classical economists and J.B. Say believed that “supply creates its own demand”, so there can be no general over‑production or unemployment in the long run.
  • Keynes, through the principle of effective demand, rejected this view. As employment and income rise, the whole of income is not automatically spent on consumption and investment.
  • If part of income is saved and not matched by sufficient investment, aggregate demand becomes less than aggregate supply, and the economy faces deficiency of effective demand and unemployment.
CISCE: Class 12

Refutes Pigou’s wage‑cut argument

  • A.C. Pigou suggested that cutting money wages would lower production cost and increase employment.
  • The principle of effective demand shows the contradiction here. When wages are cut, workers’ incomes fall.
  • Lower income reduces consumption expenditure, which reduces aggregate demand and effective demand.
  • With lower effective demand, firms may actually reduce production and employment instead of increasing it. Thus, wage cuts are not a reliable cure for unemployment.
CISCE: Class 12

Highlights the importance of investment

  • In Keynesian theory, investment has a central role in determining employment.
  • The doctrine of effective demand states that employment cannot expand unless investment spending increases.
  • Higher investment increases aggregate demand, leading to higher output, income, and employment.
  • Thus, investment is like the spinal support of the Keynesian system for raising the level of employment.
CISCE: Class 12

Emphasis on the demand side (short run)

  • Keynes focused on the short run, where productive capacity and aggregate supply are taken as given or relatively fixed.
  • In this view, changes in output and employment are mainly due to changes in aggregate demand, not supply.
  • Therefore, for a given aggregate supply, the level of aggregate demand determines the effective demand and hence the equilibrium level of employment and income.
CISCE: Class 12

Explains the paradox of poverty amidst plenty

  • The principle of effective demand explains an important contradiction of advanced capitalist economies: high income and productive capacity can coexist with high unemployment.
  • In rich economies, the gap between income and consumption is large, and it is not fully filled by new investment. This creates a persistent deficiency of effective demand.
  • At the same time, these economies already possess abundant capital stock, which limits profitable new investment opportunities.
  • Due to lack of sufficient investment, the deficiency of effective demand persists and unemployment remains, even though the economy has the capacity to produce much more.
  • This situation is called the “paradox of poverty amidst potential plenty”. Keynes considered it a natural feature of rich communities, and Joan Robinson described it as “poverty amidst plenty”.
CISCE: Class 12

Real-Life Application

  • Suppose an economy has factories capable of producing many cars, and people have high incomes.
  • If consumers decide to save more and firms do not increase investment spending, demand for cars may be too low.
  • Car companies cut back production and lay off workers, so unemployment rises even though the economy has plenty of resources and capacity.
CISCE: Class 12

Key Points: Importance of Effective Demand

  • Determines employment: Level of employment depends on effective demand; unemployment is due to its deficiency.
  • Rejects Say’s Law: Income does not automatically create equal demand.
  • Refutes wage-cut theory: Wage cuts reduce demand and employment.
  • Highlights role of investment: Employment rises only when investment increases.
  • Explains paradox of poverty: Unemployment can exist even with abundant resources due to low demand.

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