National Income



The total output of goods and services has an important influence on the standard of living and on the number of people employed. 
Gross domestic product (GDP) describes the total output produced by the factors of production located in a country  [some of these factors (e.g. capital) may be owned by foreign firms]. 
Gross National Product (GNP) is the total output produced by the factors of production of a country whether at home or abroad. 
This is measured as
Gross National product = GDP + Net property income from abroad.
Where, net property income from abroad =
                             Property income earned abroad – Property income paid abroad.

The value of the goods required to make good the depreciation of capital is deducted from the GNP in order to obtain the Net national Product. Net national Product is usually referred to as the national Income.        
National Income (NNP) = Gross National Product ─ Depreciation.
 
The National Income is measured using the prices of the goods and service in the year in which they are produced, which is money national income.   Real national income refers to the actual quantities of goods and services produced.  The standard of living depends on the quantities of goods and services produced, that is the real national income.

The measure of National income is very useful and important, because
1) It provides the government with essential information 
2) To indicate changes in the standard of living
3)  To compare the standards of living in different countries.
There are some problems in comparing the standard of living using National income.
1) National income does not tell us how it is distributed.
2)  It also does not tell the types of goods and services produced.
3) Increase in production and national income also lead to an increase in social costs in the form of pollution, congestion and noise, which would not increase the standard of living. 
4) Different countries will have different tastes, and different ways of life [Cold countries need to spend more on heating] and so on. 
5) In some countries the national income is unequally distributed, or 
6) If greater percentage of income is spend on defence then also higher national income will not provide better standard of living. 
7) Sometimes the income per head may be same in two countries, but people in one country may be working longer hours than that of the other. In such cases also one cannot compare the standard of living properly.   
Measuring National income
Goods and services are being produced and used up continuously. Therefore national income is a measure of the total flow of goods and services over a period of one year.  There are different methods to measure national Income. They are 1) the output method 2) the income method 3) the expenditure method.
The output method attempts to measure the value of the outputs of all the different industries. The major problem of this method is the possibility of double counting of the value of output. This problem is overcome by counting only the value added by each firm.
The money value of the goods and services produced will be equal to their costs of production plus profits.  Therefore, the measure of the national output, using income method is the value of all the factor incomes (including profits) paid during the course of production.  The Transfer payments such as pensions and social security benefits are not included in the national income. 

The goods and services produced must be either sold or added to stocks. It is counted as the additions to the existing stocks as a part of total expenditure on the national output in the expenditure method.  This national expenditure is equal to national output. Spending on imports must be excluded   and expenditure on exports must be included.  Taxes on goods and services are also to be deducted from the total spending.
All the above three methods are measuring the same thing; that is the value of National income.
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