Important Concept Dates, Formula for Class 12

 INDIAN ECONOMY-IMPORTANT YEARS

Important Events and Record for Indian Economic Development

1. 1757 Battle of Plassey

2. 1850-Introduction of railways

3. 1852-First postal stamp was launched

4. 1854- First railway bridge was constructed in India

5. 1869- Opening of Suez Canal

6. 1881-First official census

7. 1907-Tata iron and steel company started

8. 1921-Year of great divide, first phase of demographic transition

9. 1932-Private sector aviation launched by Tata & sons

10. 1935-Reserve Bank of India

11. 1948-First Industrial Policy Resolution

12. 1948-GATT-General Agreement on Trade & Tariff

13. 1950-Established planning commission

14. 1950-Established World health organization

15. 1951-First, five year plan started in India

16. 1951-Development and regulation Act

17. 1953- First, five year plan started in China

18. 1955-Karve committee on village & small scale industry development

19. 1956-Second Industrial Policy Resolution

20. 1958-Great leap forward-China

21. 1965-Proletarian culture-China

22. 1966- First phase of Green Revolution started

23. 1966-Adopted High Yield Variety Programme

24. 1969-India institutional credit approach (social banking & multiagency approach)

25. 1969- Monopolies and Restrictive Policy Act

26. 1969-Nationalization of commercial banks

27. 1970-Beginning of white revolution

28. 1970- Beginning of Atomic power generation

29. 1973- Foreign Exchange Regulation Act

30. 1974-Central pollution control board

31. 1978- Economic Reforms in China 

32. 1979-One Child Norm in China

33. 1982-National bank for Agriculture and Rural Development

33. 1986- Environment protection Act

34. 1987- Montreal Protocol ( Ozone Leyer Deletion) 

35. 1988- National Forest policy

36. 1988-Economic Reforms in Pakistan

37. 1991-New Economic Policy (July 1991)

38. 1991-New Industrial Policy

39. 1992-Earth Summit Rio De janerio (Sustainable Development) 

40. 1995-World trade organization

41. 1995-National social assistance programme

42. 1998- Tapas Majumdar committee (expenditure in education)

43. 1999-Foreign Exchange Management Act 1999-Swarnjyanti Gram swarojgar yojana

44.2001-Removal of quantitative restriction on import export

45. 2004- National food for work programme

46.2005- National Rural Employment Guarantee Act 2012-Established SEZ (Special Economic Zone)

47. 2014-Pradhan mantra jan-Dhan Yojna

48. 2014-Make in India

49. 2015- NITI Ayog (National Institute for Transforming India)

50. 2016-Demonetization

51. 2017-Goods & Service Tax (1ª July 2017)

The Components of Aggregate Demand (AD)

In a two-sector model (households and firms), AD is the sum of consumption and investment:

$AD=C+I$

Where:

• C: Consumption Expenditure

• I: Investment Expenditure (assumed to be autonomous/fixed in this model)

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2. The Consumption Function

Consumption doesn't just happen; it depends on income. The linear consumption function is:

$C=\bar{c}+b(Y)$

• cˉ: Autonomous Consumption (consumption when income is zero).

• b: Marginal Propensity to Consume (MPC). This is the slope of the consumption curve.

• Y: National Income.

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3. Propensities to Consume and Save

These ratios explain how much of our income we spend versus how much we squirrel away.

Concept	Formula	Key Relationship
Average Propensity to Consume (APC)	$APC=\frac{C}{Y}$	$APC+APS=1$
Average Propensity to Save (APS)	$APS=\frac{S}{Y}$
Marginal Propensity to Consume (MPC)	$MPC=\frac{\Delta C}{\Delta Y}$	$MPC+MPS=1$
Marginal Propensity to Save (MPS)	$MPS=\frac{\Delta S}{\Delta Y}$

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4. Equilibrium Income (Y)

The economy is in equilibrium when what people plan to demand equals what is produced. This can be calculated two ways:

1. AD = AS Approach: $Y=C+I$

2. Saving = Investment Approach: $S=I$

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5. The Investment Multiplier (k)

This is the "magic" of macroeconomics—it shows how an initial change in investment leads to a much larger change in final income.

• Primary Formula: $k=\Delta Y/$ΔI

• Relation with MPC: $k=1/1-MPC$

• Relation with MPS: $k=1/MPS$

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A Quick Tip for Exams

Remember that MPC and the Multiplier (k) have a direct relationship (as MPC goes up, k goes up), while MPS and the Multiplier have an inverse relationship.

Equilibrium Of AD and AS

Deficit Type	Formula	What it tells you
Revenue Deficit	$=\; TotalRevenueExp.-TotalRevenueReceipts$	How much the govt is overspending on its daily "lifestyle" (salaries, subsidies, etc.).
Fiscal Deficit	$=TotalExp.-TotalReceipts(ExcludingBorrowings)$	The total borrowing requirement of the government.
PrimaryDeficit=	$FiscalDeficit-InterestPayments$	The borrowing requirement for current expenses, excluding old debt burdens.

Balance of Payments (BoP) 

1. Important Formulas

The Balance of Payments is a systematic record of all economic transactions between residents of a country and the rest of the world during a given period.

A. Balance of Trade (BoT)

Also known as the "Merchandise Balance" or "Visible Balance".

$$\text{Balance of Trade} = \text{Exports of Goods} - \text{Imports of Goods}$$

B. Current Account Balance

This represents the net income of a country.

$$\text{Current Account Balance} = \text{Trade Balance} + \text{Net Invisibles}$$

Where:

$$\text{Net Invisibles} = \text{Net Services} + \text{Net Transfers} + \text{Net Income}$$

C. Balance of Payments (BoP) Formula

In an accounting sense, the BoP always balances (sums to zero).

$$\text{BoP} = \text{Current Account} + \text{Capital Account} + \text{Errors \& Omissions} = 0$$

2. Components of Balance of Payments

The BoP structure is divided into two main accounts:

I. Current Account

Records transactions that do not affect the assets or liabilities of the country. It is a flow concept.

1. Visible Trade (Merchandise):

   • Exports of physical goods.

   • Imports of physical goods.

2. Invisible Trade (Services):

   • Factor Services: Income from investments (Profit, Interest, Dividends).

   • Non-Factor Services: Shipping, Banking, Insurance, Tourism, Software services.

3. Unilateral Transfers (Unrequited Transfers):

   • One-sided transactions where no good/service is given in return.

   • Examples: Gifts, Grants, Remittances from workers abroad.

II. Capital Account

Records transactions that change the assets or liabilities of the country. It is a stock concept (though the flow changes the stock).

1. Borrowings (External Debt):

   • External Commercial Borrowings (ECB): Loans taken by the private sector from abroad.

   • External Assistance: Loans taken by the government (often at concessional rates).

2. Foreign Investments:

   • Foreign Direct Investment (FDI): Investment with control/ownership (e.g., Walmart opening a store in India).

   • Foreign Portfolio Investment (FPI): Investment in financial assets like shares/bonds without management control.

3. NRI Deposits:

   • Deposits made by Non-Resident Indians in domestic banks.

4. Banking Capital:

   • Foreign exchange assets held by commercial banks.

III. Official Reserve Transactions (ORT)

• Transactions undertaken by the Central Bank (RBI) to finance a deficit or absorb a surplus.

• Decrease in Reserves: Acts as a Credit (+) item (Inflow of funds to the economy).

• Increase in Reserves: Acts as a Debit (-) item (Outflow of funds to reserves).

3. Key Differences (Important for Exams)

A. Balance of Trade vs. Balance of Payments

Basis	Balance of Trade (BoT)	Balance of Payments (BoP)
Scope	Narrow concept.	Broad concept (includes BoT).
Components	Only visible items (Goods).	Visible items, Invisible items, and Capital transfers.
Nature	Can be favorable, unfavorable, or balanced.	Always balanced in the accounting sense.
Significance	Partial view of the economy.	Complete view of the economy's international relations.

B. Autonomous vs. Accommodating Items

Basis	Autonomous Items	Accommodating Items
Motive	Profit Maximization (Economic motive).	Balancing the BoP (Restoring equilibrium).
Dependency	Independent of the state of BoP.	Determined by the net consequence of autonomous items.
Name	Known as "Above the Line" items.	Known as "Below the Line" items.
Nature	Cause of BoP Surplus or Deficit.	Correction of BoP Surplus or Deficit.
Example	Export of goods, FDI.	Borrowings from IMF, Use of Forex Reserves.

Foreign Exchange Rate 

1. Basic Definitions

• Foreign Exchange (Forex): Refers to the entire stock of currencies of other countries held by a nation (e.g., US Dollars, British Pounds held by India).

• Foreign Exchange Rate (FER): The price of one currency in terms of another.

  • Example: $1=₹83$ means it costs 83 rupees to buy 1 dollar.

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2. Systems of Exchange Rate

This is the "history vs. modern" part of the chapter. You must know the difference between the three systems.

A. Fixed Exchange Rate System

• Definition: The exchange rate is officially fixed by the Government or Central Bank.

• Purpose: To ensure stability in foreign trade.

• Key Feature: The government must maintain large reserves of foreign currency to maintain this rate.

• Variants:

  • Gold Standard System: Value of currency defined in terms of gold.

  • Bretton Woods System: Currencies pegged to the US Dollar, and US Dollar pegged to gold.

B. Flexible (Floating) Exchange Rate System

• Definition: The rate is determined by market forces of Demand and Supply.

• Role of Govt: Minimal or no intervention.

• Key Feature: The rate fluctuates daily based on market conditions.

• Note: This is the system most countries use today.

C. Managed Floating (Dirty Floating)

• Definition: A hybrid system. The rate is largely determined by market forces, but the Central Bank (RBI) intervenes to restrict fluctuations within specific limits.

• Why "Dirty"? Because it is not a "clean" free market; the central bank manipulates it to protect the domestic economy.

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3. Demand and Supply of Foreign Exchange

This is the most "technical" part where you might need to draw graphs.

Demand for Foreign Exchange (Why do we need Dollars?)

We demand foreign currency when money flows OUT of India.

• Sources:

  1. Imports: Buying goods/services from abroad.

  2. Tourism: Indians travelling abroad.

  3. Unilateral Transfers: Sending gifts/grants to relatives abroad.

  4. Investment: Buying assets (land/shares) in foreign countries.

• Curve Shape: Downward Sloping.

  • Reason: When the exchange rate falls (Dollar becomes cheap), imports become cheaper, so demand for Dollars rises.

Supply of Foreign Exchange (How do Dollars come IN?)

We receive foreign currency when money flows INTO India.

• Sources:

  1. Exports: Selling goods/services to foreigners.

  2. Tourism: Foreigners visiting India.

  3. Remittances: NRIs sending money home to families in India.

  4. Foreign Investment: Foreigners buying assets in India (FDI/FII).

• Curve Shape: Upward Sloping.

  • Reason: When the exchange rate rises (Dollar becomes expensive), Indian goods become cheaper for foreigners, so exports rise, increasing the supply of Dollars.

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4. Important Distinctions (Exam Favorites)

Appreciation vs. Depreciation (Flexible System)

This happens due to Market Forces (Demand & Supply).

Feature	Currency Depreciation	Currency Appreciation
Meaning	Domestic currency loses value. (You need more ₹ to buy $1).	Domestic currency gains value. (You need less ₹ to buy $1).
Example	Rate moves from $1=₹70$ to $1=₹80$.	Rate moves from $1=₹80$ to $1=₹70$.
Effect on Exports	Exports Increase (Goods become cheaper for foreigners).	Exports Decrease (Goods become expensive for foreigners).
Effect on Imports	Imports Decrease (Foreign goods become expensive).	Imports Increase (Foreign goods become cheaper).

Devaluation vs. Revaluation (Fixed System)

This happens due to Government Order.

• Devaluation: Gov deliberately lowers the value of domestic currency (similar effect to depreciation).

• Revaluation: Gov deliberately increases the value of domestic currency.

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5. The Foreign Exchange Market

• Functions:

  1. Transfer Function: Transferring purchasing power between countries.

  2. Credit Function: Providing credit for foreign trade (exports/imports).

  3. Hedging Function: Protecting against risks caused by fluctuating exchange rates.

• Types of Markets:

  • Spot Market: Transactions happen immediately ("on the spot"). Current exchange rate applies.

  • Forward Market: Transactions are agreed upon today but will happen at a future date. Used to avoid risk (hedging).

    
    

    
    

National Income 

Basic Concepts

Before diving into the aggregates, you must understand four key pairs of terms. These are the building blocks of all National Income formulas.

A. Gross vs. Net (Depreciation)

• Gross: Includes depreciation (wear and tear of capital assets).

• Net: Excludes depreciation.

• Formula:

  $$Net=Gross-Depreciation$$
  $$Gross=Net+Depreciation$$

B. Domestic vs. National (NFIA)

• Domestic: Income generated within the geographic/political boundaries of a country.

• National: Income generated by the normal residents of a country (whether inside or outside).

• NFIA (Net Factor Income from Abroad): Income earned by residents from abroad minus income earned by non-residents within the domestic territory.

• Formula:

  $$National=Domestic+NFIA$$

C. Market Price (MP) vs. Factor Cost (FC) (NIT)

• Market Price (MP): The price paid by consumers (includes taxes).

• Factor Cost (FC): The cost of production (payments to factors of production like rent, wages, etc.).

• NIT (Net Indirect Taxes): Indirect Taxes − Subsidies.

• Formula:

  $$MP=FC+NIT$$
  $$FC=MP-NIT$$

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2. The 8 Main Aggregates

Using the logic above, we can derive the eight major aggregates.

Domestic Aggregates

1. GDP at Market Price ($GD{P}_{MP}$): Gross market value of all final goods and services produced within the domestic territory during a year.

2. GDP at Factor Cost ($GD{P}_{FC}$): $GD{P}_{MP}-NetIndirectTaxes$

3. NDP at Market Price ($ND{P}_{MP}$): $GD{P}_{MP}-Depreciation$

4. NDP at Factor Cost ($ND{P}_{FC}$): $GD{P}_{MP}-Depreciation-NetIndirectTaxes$. (Note: This is often simply called Domestic Income).

National Aggregates

5. GNP at Market Price ($GN{P}_{MP}$): $GD{P}_{MP}+NFIA$

6. GNP at Factor Cost ($GN{P}_{FC}$): $GN{P}_{MP}-NetIndirectTaxes$

7. NNP at Market Price ($NN{P}_{MP}$): $GN{P}_{MP}-Depreciation$

8. NNP at Factor Cost ($NN{P}_{FC}$): This is "National Income".

   • Formula from GDP: 

     $$NN{P}_{FC}=GD{P}_{MP}-Depreciation+NFIA-NIT$$

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3. Methods of Calculating National Income

There are three ways to measure National Income (NNPFC​), and theoretically, all three should yield the same result.

A. Value Added Method (Product Method)

Measures the contribution of each producing unit.

1. Calculate Gross Value Added at Market Price ($GV{A}_{MP}$):

   $$ValueofOutput-IntermediateConsumption$$

2. Sum of all GVAMP​ = GDPMP​.

3. Adjust to NNPFC​:

   $$NN{P}_{FC}=GD{P}_{MP}-Depreciation+NFIA-NIT$$

B. Income Method

Sums up payments made to factors of production (Land, Labor, Capital, Enterprise).

1. Sum of Components:

   • Compensation of Employees (COE)

   • Operating Surplus (Rent + Royalty + Interest + Profit)

   • Mixed Income of Self-Employed

2. Sum = NDPFC​ (Domestic Income).

3. Adjust to NNPFC​:

   $$NN{P}_{FC}=ND{P}_{FC}+NFIA$$

C. Expenditure Method

Sums up final expenditure on goods and services.

1. Sum of Components:

   • Private Final Consumption Expenditure (C)

   • Government Final Consumption Expenditure (G)

   • Gross Domestic Capital Formation (Investment or I)

   • Net Exports ($X-M$)

2. Sum = GDPMP​.

3. Adjust to NNPFC​:

   $$NN{P}_{FC}=GD{P}_{MP}-Depreciation+NFIA-NIT$$

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4. Important "Tricks" for Numerical Problems

• Change in Stock: This is part of Investment (Gross Domestic Capital Formation).

  $$ChangeinStock=ClosingStock-OpeningStock$$

• Operating Surplus: If the question gives "Operating Surplus," do not add Rent, Interest, or Profit separately; they are already included.

• Imports/Exports: Be careful with signs. "Net Imports" implies ($Imports-Exports$), so you must subtract it if the formula asks for Net Exports.

• Real vs. Nominal GDP:

  • Nominal GDP: GDP at current year prices.

  • Real GDP: GDP at base year prices (adjusted for inflation).

  • GDP Deflator: $\frac{NominalGDP}{RealGDP}\times 100$