Econometrics is the statistical and mathematical analysis of economic relationships, often serving as a basis for economic forecasting. It is used by economists to study relationships between economic variables Econometrics is interesting because it provides the tools to enable us to extract useful information about important economic policy issues from the available data. It is used to understand economic issues and test theories. Without evidence economic theories are abstract and has no bearing on reality. Econometrics is a set of tools we can use to confront theory with real world data. A study' could estimate a key parameter such as the price elasticity of demand for it or econometric techniques could be used to generate forecasts. It is used to develop, estimate and evaluate models which relate economic or financial variables.

S.NO.XYXYX²Y² 1 23 18 414 529 324 2 27 22 594 729 484 3 28 23 644 784 529 4 29 24 696 841 576 5 30 25 750 900 625 6 31 26 806 961 676 7 33 28 924 1089 784 8 35 29 1015 1225 841 9 36 30 1080 1296 900 10 39 32 1248 1521 1024 N=10 311 257 8171 9875 6763 \(r =\frac{N \sum X Y-\left(\sum X\right)\left(\sum Y\right)}{\sqrt{N \sum X^{2}-\left(\sum X\right)^{2}} \sqrt{N \sum Y^{2}-\left(\sum Y\right)^{2}}} \)
\(=\frac{(10 \times 8171)-311 \times 257}{\sqrt{(10 \times 9875)-(311)^{2}} \sqrt{10 \times 6763-(257)^{2}}} \)
\(=\frac{81710-79927}{\sqrt{98750-96721} \sqrt{67630-66049}} \)
\(=\frac{1783}{\sqrt{2029} \sqrt{1581}}=0.9955\)
Ans: + 0.9955 high correleated 

Introduction:
(i) Planning may retard private initiatives, hamper freedom of choice, involve huge cost of administration and stop automatic adjustment of price mechanism.
(i) Loss of freedom
1. Regulations and restrictions are the backbone of a planned economy.
2. Economic freedom consists of freedom of consumption, freedom of choice of occupation, freedom to produce and the freedom to fix prices for the products.
3. Under planning, crucial decisions are made by the Central Planning Authority.
4. The consumers, producers and the workers enjoy no freedom of choice.
5. Hayek in his book 'Road to Serfdom' explains that centralized planning leads to loss of personal freedom and ends in economic stagnation.
(ii) Elimination of Initiative
1. Planning follows routine proocedure and may cause stagnation in growth.
2. Absence of private ownership and profit discourages entrepreneurs from risk taking.
3. Attractive profit is the incentive for searching new ideas, new methods.
4. All enjoy equal reward under planned economy irrespective of their effort, efficiency.
5. So, nobody is interested in undertaking new and risky ventures.
6. The bureaucracy and red tapism cause procedural delay and time loss.
7. So, even socialist countries like Russia and China offer incentives to private firms.
(iii) High cost of Management
1. Plan formulation and implementation involve an army of staff for data collection and administration.
2. Lewis remarks, "The better we try to plan, the more planners we need".
3. Inadequate data, faulty estimations and improper implementation of plans result in wastage of resources and cause either surplus or shortages.
(iv) Difficulty in advance
calculations
1. Advance calculations in a precise manner is impossible with regard to consumption and production.
2. It is also difficult to put the calculations into practice under planning.
Conclusion
1. The arguments against planning are mostly concerned with centralized and totalitarian planning.

Natural Resource:
(i) The existence of natural resources in abundance is essential for development.
(ii) But Japan, though it lacks natural resources imports them and achieves faster rate of economic development with the help of technology.
Capital Formation:
(i) Capital formation refers to the net addition to the existing stock of capital goods which are either tangible (plants, machinery) or intangible (health, education).
(ii) Capital formation helps increase productivity of labour, production and income.
(iii) Advanced techniques of production can be used and leads to better utilization of natural resources, industrialization and expansion of markets which are essential for economic progress.
Size of the Market:
(i) Large size of the market would stimulate production, increase employment and raise the National per capita income.
Structural Change:
(ii) Structural change refers to change in the occupational structure of the economy.
(iii) Any economy is divided into primary secondary and tertiary sector.
(iv) Any economy which is predominantly agricultural remains backward.
Financial System:
(i) Financial system implies the existence of an efficient and organized banking system in the country.
(ii) There should be an organized money market to facilitate easy availability of capital.
Marketable Surplus:
(i) It refers to the total amount of farm output cultivated by farmers over and above their family consumption needs.
(ii) This surplus brings income, raises purchasing power, employment and output in other sectors.
Foreign Trade:
(i) A country with favorable balance of trade is always developed.
Economic System:
(i) A country with free market system enjoys better growth rate compared to controlled economies.

Introduction:
1. Externality refers to external effects or spillover effects resulting from production or consumption on the third parties.
Definition:
1. It may be defined as "the cost or benefit imposed by the consumption and production activities of the individuals on the rest of the society not directly involved in these activity and towards which no payment is made".
Types:
1. Beneficial externalities are called "positive externalities".
2. Adverse externalities are called "negative externalities".
Positive Consumption Externality
1. When some residents of a locality hire a private security agency to patrol their area, the other residents of the area also benefit from better security without bearing cost.
Negative Consumption Externality
1. A person smoking cigarette gets satisfaction but this act causes dissatisfaction to the non-smokers who are driven to passive smoking.
Positive Production Externality
1. The ideal location for beehives is orchards.
2. While bees make honey, they also help in the pollination of apple blossoms.
3. The benefits. accrue to both producers (honey and apple).
4. This is called reciprocal untraded interdependency.
Negative Production Externality
1. They include pollution generated by a factory that imposes costs on others.
2. The emissions and effluents of a factory cause air and water pollution.
3. Water becomes contaminated and unfit for drinking (e.g.) Tanneries.
4. The innocent community bears the external cost for which it is not compensated.

Introduction:
(i) The modern state is a welfare state. In a welfare state government has to perform several functions i.e. social, economic and political.
(ii) These activities lead to increasing public expenditure.
Population Growth
(i) The growth in population needs huge investment in health and education, law and order. Young population need increasing expenditure on education & youch services.
(ii) Aging population needs transfer payments - old age pension, social security.
Defence Expenditure
(i) Defence expenditure increases due to modernisation of defence equipment.
Government Subsidies
(i) Government provides subsidies on food, fertilizers, interest on priority sector lending, exports, education.
(ii) Because of the huge subsidies public expenditure increased manifold.
(iii) Corporate sectors also receive subsidies.
Debt Servicing
(i) Government has borrowed heavily from internal and external sources.
(ii) So government has to make huge amounts of repayment towards debt servicing.
Development Projects
(i) Various development projects like irrigation, iron and steel, heavy machinery, power, telecommunications involve huge investment.
Urbanisation
(i) The urban population is 43 %.
(ii) There are more than 54 cities above one million population.
(iii) The increase in urbanization needs heavy expenditure on law and order, civic amenities.
Industrialisation
(i) In a planned economy, the government starts basic and heavy industries which need huge capital and have long gestation period.
(ii) UDCs also need strong infrastructures like transport, communication, power, fuel.
Increase in grants in aid to state and union territories
(i) There is increase in grants-in-aid to state and union territories to meet natural disasters.

Budget deficit is a situation where budget receipts are less than budget expenditures. This situation is also known as government deficit. The Indian Government budget refers. The Budget deficit is of four major types.
(1) Revenue Deficit
(2) Budget Deficit
(3) Fiscal Deficit and
(4) Primary Deficit
(1) Revenue Deficit:
(i) It refers to the excess of the government revenue, expenditure over revenue receipt.
(ii) It doesn't consider capital receipts and capital expenditure.
Revenue Deficit (RD) = Total Revenue Expenditure (RE) - Total Revenue Receipts
(2) Budget Deficit:
(i) Budget deficit is the difference between total receipts and total expenditure.
Budget deficit = Total Expenditure - Total Revenue
(3) Fiscal Deficit:
Fiscal Deficit (FD) = Budget deficit + Government's market borrowings and liabilities.
(4) Primary Deficit:
(i) It is equal to fiscal deficit minus interest payments.
(ii) It reflects the borrowing requirement of the government exclusive of interest payments.
Primary Deficit (PO) = Fiscal Deficit (PO) - Interest Payments (IP)

Introduction:
(i) The process of repaying a public debt is called redemption.
Sinking Fund
(i) The Government establishes a separate fund into which every year a fixed amount of money is credited.
(ii) By the time the debt matures, the fund accumulates enough amount to pay off the principal along with interest.
Conversion
(i) An old loan is converted into a new loan.
(ii) A high interest public debt is converted into a low interest public debt.
Budgetary Surplus
(i) When the Government has a surplus budget, it can be used for repaying the debt.
Terminal Annuity
(i) Government pays off debt on the basis of terminal annuity in equal annual instalments.
Repudiation
(i) Government does not recognise its obligation to repay the loan.
(ii) But in normal case the Government does not do so; if done it will lose its credibility.
Reduction in Rate of Interest
(i) During financial crisis there is compulsory reduction in the rate of interest.
Capital Levy
(i) When Government imposes levy on the capital assets owned by an individual or any institution, it is called capital levy.
(ii) This levy is imposed on capital assets above a minimum limit on a progressive scale.
(iii) The fund so collected can be used by the Government for paying off war time debt.

Introduction:
1. India is the founding member of the WTO.
2. India favours multilateral trade approach and enjoys MFN status.
3. India benefited from WTO on following grounds:
4. By reducing tariff rates on raw materials, components and capital goods, it was able to import more for meeting her developmental needs.
5. India's imports go on increasing.
6. India gets market access in several countries without any bilateral trade agreements.
7. Advanced technology has been obtained at cheaper cost.
8. India is in a better position to get quick redressal from the trade disputes.
9. Indian exporters benefited from wider market information.

(i) The equilibrium rate of exchange is determined in the foreign exchange market according to the general theory of value, by the interaction of demand and supply,
(ii) Y axis represents exchange rate, be cos value of rupee in terms of dollars
(iii) X axis represents demand and supply of forex.
(iv) E is the equilibrium point where DD intersects SS. The exchange rate is P₂.

Introduction
(i) The credit and debit items are shown vertically in the BoP account of a country.
(ii) Horizontally, they are divided into 3 components.
Current Account
(i) It includes all international trade transactions of goods and services, international service transactions (tourism, transportation, royalty fees) and international unilateral transfers (gifts, foreign aid).
Capital Account
(i) Financial transactions consisting of direct investment and purchases of interest bearing financial instruments, non interest bearing demand deposits and gold are included.
Official Reserve Assets Account
(i) Consist of movements of international reserves by governments and official agencies to accommodate imbalances arising from the current and capital accounts.
(ii) The official reserve assets include its gold stock, holdings of its convertible foreign currencies, SDR and its net position in the IMIF.

Introduction
1. Modern theory of international trade was developed by Heckscher and Bertil Ohlin.
2. This theory says that basis for international trade is the differences in factor endowments.
3. So this theory is also called Factor Endowment Theory.
Theory
1. International differences in comparative costs is due to:
(i) Difference in the endowments of factors of production between countries.
(ii) Differences in the factor proportions required in production.
Assumptions
1. There are two countries, two commodities, two factors (2 x 2 x 2 model).
2. Countries differ in factor endowments.
3. Commodities are categorized in terms of factor intensity.
4. Countries use same production technology.
5. Countries have identical demand conditions.
6. There is perfect competition in product and factor markets in both the countries.
Explanation
1. According to Heckscher-Ohlin, "a capital abundant country will export the capital intensive goods, while labour abundant country will export the labour intensive goods".
2. A factor is regarded abundant or scarce in relation to the quantum of other factors.
3. A country is richly endowed with capital only if the ratio of capital to other factors is higher than other countries.
Particulars India America Supply of Labour 50 24 Supply of Capital 40 30 Capital-Labour Ratio 40/50 = 0.8 30/24 = 1.25 4. Even though India has more capital (40) compared to America (30) in absolute terms, yet America is more richly endowed with capital because the ratio of capital in India is $0.8$ which is less than that in America (1.25).
Criticism
1. Factor endowment of a country may change over time.
2. The efficiency of the same factor (labour) may differ in the two countries.

S.No	Internal Trade	International Trade
1	Trade takes place between different individual and firms within the same nation.	Trade takes place between different individual and firms in different countries.
2	Labour and capital move freely from one region to another.	Labour and capital do not move easily from one nation to another.
3	Free flow of goods and services since there are no restrictions.	Goods and services do not easily move from one country to another because of tariff and quota.
4	There is only one common currency.	There are different currencies.
5	Physical and geographical conditions of a country are similar.	There are differences in physical and geographical conditions of the two countries.
6	Trade and financial regulations are same.	Trade and financial regulations, interest rate, trade laws differ between countries.
7	No difference in political affiliations, customs and habits of the people and government policies.	There are lot of differences in political affiliation, habits, customs of the people and government policies.

Introduction
(i) The Reserve Bank of India is India's central banking institution
(ii) It commenced its operations on 1 April 1935 and it was nationalised on 1 Jan, $1949 .$
1) Monetary Authority
(i) It controls the supply of money in the economy to stabilize exchange rate, maintain healthy balance of payment, attain financial stability, control inflation, strengthen banking system.
2) Issuer of currency
(i) It is the sole authority to issue currency
(ii) It also takes action to control the circulation of fake currency.
3) Issuer of Banking License
(i) Every bank has to obtain a banking license from RBI to conduct banking business in India.
4) Banker to the Government
(i) It is the banker to the central and the state governments.
(ii) It provides short term credit, manages all need issues of government loans, services the government debt outstanding
(iii) It advises the government on banking and financial matters.
5) Banker's Bank
(i) It is the bank of all banks in India as it provides loan to banks, accepts the deposit of banks and rediscounts the bills of banks.
6) Lender of last resort
(i) The banks can borrow from RBI by keeping eligible securities as collateral at the time of need when there is no other source.
7) Act as clearing house
(i) For settlement of banking transactions, RBI manages 14 clearing houses.
(ii) It facilitates the exchange of instruments and processing of payment instructions.
8) Custodian of foreign exchange reserves
(i) It administers and enforces the provision of Foreign Exchange Management Acr, 1999.
(ii) RBI buys and sells foreign currency to maintain the exchange rate of Indian rupee vs foreign currencies.
9) Regulator of Economy
(i) It controls the money supply in the system, monitors GDP, Inflation
10) Managing Government securities
(i) RBI administers investments in institutions when they invest specified minimum proportions of their total assets/liabilities in government securities.
11) Regulator and Supervisor of Payment and Settlement Systems
(i) RBI oversees the payment and settlement systems in the country.
(ii) It focuses on the development and functioning of safe, secure and efficient payment and settlement mechanisms.
12) Developmental Role
(i) It develops the quality of banking system in India and ensures that credit is available to the productive sectors of the economy.
(ii) It provides a wide range of promotional functions to support national objectives.
(iii) It establishes institutions which build the financial infrastructure.
(iv) It also helps in expanding access to affordable financial services and promotes financial education and literacy.
13) Publisher of monetary data
(i) It maintains and provides all essential bánking and other economic "data, formulating and critically evaluating the economic policies in India.
(ii) RBI collects, collates and publishes data regularly.
14) Exchange manager and controller
(i) RBI represents India as a member of the International Monetary Fund.
(ii) Most of thé commercial banks are authorized dealers of RBI.
15) Banking Ombudsman Scheme
(i) RBI introduced this Scheme in 1995
(ii) Those who have complaints including online, can appeal to the Ombudsman against the awards and the other decisions of the Banks.
16) Banking Codes and Standards Board of India
(i) To measure the performance of banks against Codes and Standards based on established global practices, the RBI has set up the Banking Codes and Standards Board of India.

Introduction
(i) Commercial banks are institutions that conduct business with profit motive by accepting public deposits and lending loans.
Capital Formation
(i) Bank mobilize the small savings of the people scattered over a wide area through their network of branches and make it available for productive purposes.
(ii) Attractive schemes of the banks induce the people to save their money
Creation of Credit
(i) Credit creation leads to increased production, employment, sales and prices and thereby there is faster economic development.
Channelizing Funds towards Productive Investment
(i) Pooled savings is allocated to various sectors and productivity increases.
Encouraging Right Industries
(i) Banks give loan to right type of persons.
(ii) Banks grant loans and advances to manufacturers whose products are in great demand.
(iii) Manufacturers introduce new methods of production and assist in raising the national income of the country.
Banks Monetize Debt
(i) Banks transform the loan to be repaid after a certain period into cash, which can be immediately used for business activity.
(ii) Manufacturers and wholesale traders cannot increase their sales without selling goods on credit basis.
(iii) But credit sales may lead to locking up of capital.
(iv) So production is reduced.
(v) As banks are lending money by discounting bills of exchange, business concerns are able to carry out economic activities without gap.
Finance to Government
(i) Government needs finance for promoting industries.
(ii) Banks provide long-term credit to Government by investing their funds in Government securities and short-term finance by purchasing Treasury Bills.
(iii) RBI has given Rs.68,000 crores to the government of India in the year 2018-19.
Employment Generation
(i) Bank's branches are opened frequently and so new employment opportunities are created.
Banks Promote Entrepreneurship
(i) Banks induce new entrepreneurs to take up the well-formulated projects and provision of counseling services like technical and managerial guidance.
(ii) Conclusions Banks provide 100 % credit for worthwhile projects, which is also technically feasible and economically viable.
(iii) Thus commercial banks help for the development of entrepreneurship in the country.

Causes:
Increase in Money Supply:
1. Increase in money supply leads to increase in aggregate demand.
2. The higher the growth rate of nominal money supply, the higher is the rate of inflation.
Increase in Disposable Income:
1. When disposable income increases, it raises their demand for goods and services.
2. Disposable income may increase with the rise in national income or reduction in taxes or saving of the people.
Increase in Public Expenditure:
1. Government activities have been expanding due to developmental activities and social welfare programmes.
2. This is also a cause for price rise.
Increase in Consumer Spending:
1. The demand for goods and services increases when they are given credit to buy goods on hire-purchase and instalment basis.
Cheap Monetary Policy:
1. Cheap monetary policy leads to increase in the money supply which raises demand for goods and services.
Deficit Financing:
1. To meet the expenses, government resorts to deficit financing by borrowing from the public and even by printing more notes.
2. This raises aggregate demand leading to inflation.
Black Assets, Activities and Money:
1. It leads to corruption, tax evasion.
2. People spend black money lavishly.
3. Black marketing and hoarding reduces the supply of goods and increases.
Repayment of Public Debt:
1. Whenever government repays its past internal debt to the public, money supply increases.
Increase in Exports:
1. When exports are encouraged, domestic supply of goods decline, prices rise.
Effects:
On Production:
1. When inflation is very moderate it is an incentive to traders and producers.
2. When profit increases the business men increase their investments in production leading to more employment and income.
3. Hyper inflation leads to depreciation of the value of money and discourages savings.
4. It may even drain out the foreign capital already invested in the country.
5. The reduced capital accumulation, discourage entrepreneurs and business men from taking business risk.
6. Inflation also leads to hoarding of essential goods by traders and consumers leading to still higher inflation rate.
7. Encourages investment in speculative activities rather than productive purposes.
On Distribution:
Debtors and Creditors:
1. During inflation debtors are the gainers.
2. Debtors had borrowed when the purchasing power of money was high and now repay the loans when the purchasing power of money is low due to rising prices.
Fixed-income Groups:
1. They are worst hit because their incomes being fixed has no relationship with the rising cost of living.
Entrepreneurs:
1. Inflation is a boon to manufacturers, traders, merchants, businessmen, because it serves as a tonic for business enterprise.
2. They get windfall gains as the prices of their stocks suddenly go up.
Investors:
1. Those who invest in fixed interest yielding bonds and securities lose during inflation.
2. Those who invest in shares stand to gain by rich dividends and appreciation in value of shares.

Introduction:
(i) It was first propounded in 1588 by an Italian economist Davanzatti. It was popularised by an Americill economist, Irving Fisher is his book, "The Purchasing Power of Money" in 1911. He gave it a quantitative form in terms of "Equation of Exchange".
Equations:
MV = PT
(i) The Supply of Money = Demand for Money
M = Money Supply
V = Velocity of Money
P = Price level
T = Volume of Transaction.
(ii) The total quantity of money will be equal to the total value of all goods and services bought and sold.
\(P=\frac{M V}{T}\)
(iii) The quantity of money determines the price level and the price level varies directly with the quantity of money provided 'V' and 'T' remain constant.
(iv) Later Fisher extended his exchange to include bank deposits M₁ and its velocity V₁.
\(P T =M V+M^{\prime} V^{\prime} \)
\(P =\frac{M V+M^{\prime} V^{\prime}}{T}\)
- The price level is determined by
(a) quantity of money in circulation M
(b) velocity of circulation of money V
(c) volume of bank credit money M₁
(d) velocity of circulation of credit money V₁
(c) Volume of trade ('T')

(i) It show's the effect of changes in the quantity of money on the price level.
(ii) When quantity of money is OM₁, the price level is OP₁.
(iii) When the quantity of money is doubled to OM₂, the price level is also doubled to OP₂.
(iv) When quantity of money is increased four-fold to OM₄, the price level also increases by 4 times to OP₄ his relationship is shown by the curve OP = f(M) from the origin at 45^o.
Quantity of money
(i) Fig B shows the inverse relation between the quantity of money and the value of money.
(ii) Value of money is taken on the vertical axis.
(iii) When the quantity of money is OM₁, the value of money is OI / P₁.
(iv) When quantity of money is doubled to OM₂, the value of money becomes one half of what it was before (OI / P₂)
(v) When quantity of money increases by the four fold to OM₄, the value of among is reduced by OI / P₄
(vi) This inverse relationship between the quantity of money and the value of money is shown by downward sloping curve 1 / OP= f(M).

Introduction
A systematic development of the simple accelerator model was made by J.M.Clark, It was further developed by Hicks, Samuelson and Harrod.
Definition
Accelerator coefficient is the ratio between induced investment and an initial change in consumption \(\beta=\frac{\Delta \mathrm{I}}{\Delta \mathrm{C}}\)
Operation
Suppose that in order to produce 1000 consumer goods, 100 machines are needed. Working life of a machine is 10 yrs i.e, every year 10 machines have to be replaced. This is called replacement demand
(i) Suppose that demand for consumer goods rises by 10 % (i.e, from 1000 to 1100)
(ii) This results in increase in demand for 10 more machines
(iii) The total demand for machines is 20 i.e, 10 % increase in demand for consumer goods causes 100 % increase in demand for machine (from 10 to 20 )

Explanation
 (i) SS is the saving curve.
(ii) II is the investment curve.
(iii) At point E₁ the economy is in equilibrium with OY₁ income.
(iv) S and I are equal at O₂.
(v) Now I increased from OI₂ to OI₄.
(vi) This increases income from OY₁ to OY₃ at E₂ equilibrium.
(vii) If the increase in investment by I₂I₄ is purely exogenous, then the increase in income by Y₁Y₃ would be due to multiplier.
(viii) But in this diagram it is assumed that exogenous investment is only by I₂I₃ and induced investment is by I₃I₄.
(ix) Therefore, the increase in income by Y₁Y₂ is due to the multiplier effect and the increase in income by Y₂Y₃ is due to the accelerator effect.

Introduction
J.M Keynes has divided factors influencing the consumption function into two namely Subjective factors and Objective factors
Subjective Factors
These factors are internal and related to psychological feelings. Keynes lists 8 motives which lead individuals to refrain from spending
Motive of precaution
To build a reserve against unforeseen contingencies. (eg.) Accidents
Motive of foresight
The desire to provide for anticipated future needs. (eg.) Old age
Motive of calculation
The desire to enjoy interest and appreciation.
Motive of improvernent
(i) The desire to enjoy for improving standard of living.
(ii) Motive of financial independence
(iii) Motive of enterprise - desire to do forward trading
(iv) Motive of pride - desire to leave a fortune
(v) Motive of avarice - miserly instinct
(vi) The government institutions, business corporations and firms may also consume mainly because of:
Motive of enterprise
The desire to get resources to carry out further capital investment without debt.
Motive of liquidity
The desire to secure liquid resources to meet emergency
Motive of improvement
The desire to secure a rising income and to demonstrate successful management
Motive of financial prudence
The desire to ensure adequate financial provision against depreciation, obsolescence and to discharge debt.
Objective Factors
They are the external factors which are real and measurable. They can be easily changed in the long run;
Income Distribution
According to VKRV Rao if incone is equally distributed propensity to consume increases
Price level
When price falls, real income rises; people consume more and save more.
Wage level
Consumption expenditure increases with a rise in wages.
Interest rate
Higher interest rate will encourage people to save more money and reduces consumption.
Fiscal Policy
When government reduces tax, disposable income rises and propensity to consume increases.
Consumer credit
The availability of consumer credit at easy installments will encourage people to buy consumer durables like car, fridge, computer
Demographic factors
(i) Size of family, stage in family life cycle, place of residence and occupation affect the consumption pattern
Duesenberry hypothesis
(i) Consumption expenditure depends on current income, past income and standard of living
(ii) As individuals are accustomed to a particular standard of living, they continue to spend the same amount on consumption
(iii) Consumption of the poor people is influenced by the rich. This is called Demonstration effect.
Windfall gain and loss
Unexpected changes in the stock market leads to gain or loss, so consumption function shifts upward or downward.
Conclusion
According to Keynes only the subjective factors do not change in the short-run, so consumption function remains stable in the short period.

S.No Keynesian Classicism 1. Short-run equilibrium Long-run equilibrium 2. Savings is a vice Saving is a social virtue 3. Money functions as medium of exchange and store of value. Money acts as a medium of exchange. 4. Macro approch to national problems. Micro foundation to macro problems. 5. State intervention is advocated. Favoured laissez-fair policy. 6. Applicable to all situations-full employment and less than full employment. Applicable only to the full employment 7. Captialism has inherent contradictions Captialism is good. 8. Budgeting should be adjusted to the requirements of economy. Balanced budget is favored. 9. Equality between saving and investment is achieved through changes in income Equality between saving and investment is achieved through changes of rate of interest 10. Rate of interest is determined by the demand for and supply of money Rate of interest is determined by saving and investment. 11. Rate of interest is a flow. Rate of interest is a stock. 12. Demand vreates its own supply. Supply creates its own demand. 13. Rate of interest is a reward for parting with liquidity Rate of interest is a reward for savings.

Introduction
According to J. B. Say "Supply creates its own demand"
Explanation
A person receives his income from production which is spent on the purchase of goods and services produced by others. For the economy as a whole, therefore, total production equals total income.
Criticisms
(i) According to Keynes, supply does not. create its demand. It is not applicable where demand does not increase as much as production increases.
(ii) Automatic adjustment process will not remove unemployment. Unemployment can be removed by increase in the rate of investment.
(iii) Money is not neutral. Individuals hold money for unforeseen contingencies, businessmen keep cash reserve for future activities.
(iv) Say's law is supply creates its own demand and there is no over production. Keynes said that over production is possible
(v) Keynes regards full employment as a special case because there is underemployment in capitalist economies.
(vi) State intervention is needed when there is over production and mass unemployment.

Introduction:
National income can be measured by the social accounting method. Under this method, the transactions among various sectors such as firms, households, government are recorded and their interrelationships traced.
Firms:
undertake productive activities. They employ factors of production to produce goods and services.
Households:
Households are consuming entities. They represent the factors of production, who receive payment for services rendered by them to firms. (i) Households consume the goods produced by the firms. There is a circular flow of money between these two groups.
Government:
The Government sector refers to the economic transactions of public bodies at all levels-centre, state and local. Their purchases may be financed through taxation, public borrowings. The government provides public health, education. They satisfy the collective wants of society. But Post Offices and railways are separated from the Government sector and included as "Firms".
Rest of the world:
It relates to international economic transactions - income, export, import external loan transaction, and allied overseas investment income and payments.
Capital sector:
(i) Capital sector refers to saving and investment activities. It includes the transactions of banks, insurance corporations, financial houses. These are not included under "Firms".
(ii) The economy is also divided into primary, secondary tertiary and quaternary sectors.
Conclusion:
The social accounting framework is useful for economists as well as policy makers, because it represents the major economic flows and statistical relationships among various sectors of the economic system. It is possible to forecast the trends of economy more accurately.

Introduction:
(i) Whatever is produced is either used for consumption or for saving. So, national output can be computed at any of three levels, ie., production, income and expenditure.
(ii) Therefore there are three methods to measure national income.
Product Method (inventory method):
(i) This method measures the output of the country. Gross value of output from different sectors like agriculture, industry, trade, commerce is obtained by the summation of all the values added in the productive process.
(ii) In India, the gross value of the farm output is obtained as follows:
(iii) Total production of 64 agriculture commodities is estimated. The output of each crop is measured by multiplying the area sown by the average yield per hectare.
(iv) Total output of each commodity is valued at market prices.
(v) The aggregate value of total output of these 64 commodities is taken to measure the gross value of agricultural output.
(vi) The net value of the agricultural output is measured by making deductions for the cost of seed, manures and fertilizers, market charges.
(vii) Net value of each sector is measured in this way.
(viii) Double counting should be avoided.
(ix) Value of output used for self consumption should be counted but sale and purchase of second hand durable goods should be excluded.
Income Method (Factor Earning Method):
(i) National income is calculated by adding up all the incomes generated while producing national product.
(ii) Enterprises are classified into industrial groups.
(iii) Factor incomes are grouped under labour income (wages, salaries, fringe benefits), capital income (profit, interest, dividend) and mixed income (farming, sole proprietorship).
\(\mathrm{Y}=\mathrm{w}+\mathrm{r}+\mathrm{i}+\pi+(\mathrm{R}-\mathrm{P})\)
(iv) Transfer payment, receipt from sale of second hand goods, windfall gains and corporate profit tax must not be included.
(v) Imputed value of rent for self occupied houses or offices and Imputed value of services provided by owners of production units are to be included.
Expenditure method (outlay method):
(i) The total expenditure incurred by the society in a particular year is added together.
(ii) It includes personal consumption expenditure (C), net domestic investment (I), Government expenditure on consumption (G) and net exports (X-M).
\(\mathrm{GNP}=\mathrm{C}+\mathrm{I}+\mathrm{G}+(\mathrm{X}-\mathrm{M})\)
(iii) Expenditure on second hand goods, purchase of shares and bonds, transfer payments and expenditure on intermediate goods should not be included.
Conclusion:
Output = Income = Expenditure
(i) This is because the three methods are circular in nature. So, if the 3 methods are done correctly this equation must hold.

S.No	Features	Capitalism	Socialism	Mixedism
1.	Ownership of Means of Production	Private Ownership	Public Ownership	Private Ownership and Public Ownership
2.	Economic Motive	Profit	Social Welfare	Social Welfare and Profit Motive
3.	Solution of Central Problems	Free Market System	Central Planning System	Central Planning System and Free Market System
4.	Government Role	Internal Regulation only	Complete Involvement	Limited Role
5.	Income Distribution	Unequal	Equal	Less unequal
6.	Nature of Enterprise	Private Enterprise	Government Enterprise	Both Private and State Enterprises
7.	Economic Freedom	Complete Freedom	Lack of Freedom	Limited Freedom
8	Major Problem	Inequally	Inefficiency	Inequality and Inefficiency

1. In an economy, the fundamental economic activities are production and consumption.
2. These are several other activities.
3. The ultimate aim is to achieve growth.
4. The exchange activity supports production and consumption.
5. These activities are influenced by economic and non economic activities.
6. The economic activities include transportation, banking, advertising, planning.
7. The non-economic activities are environment, education, health, entertainment.
8. The external activities are import, export, international relations, emigration, immigration, foreign investment, foreign exchange earnings.
9. All these activities influence the entire functioning of the economy.