View source for GDP deflator

{{infobox4
|list1=
<ul>
<li>[[Constant price GDP]]</li>
<li>[[National income measures]]</li>
<li>[[Real income]]</li>
<li>[[Wholesale price index]]</li>
<li>[[Total factor productivity]]</li>
<li>[[Effective exchange rate]]</li>
<li>[[Net domestic product]]</li>
<li>[[Average annual growth rate]]</li>
<li>[[Okuns law]]</li>
</ul>
}}

The '''GDP deflator''' is an important indicator that measures the level of prices of all new, domestically produced, final goods and services in an economy relative to a base year. It is used to adjust the real Gross Domestic [[Product]] (GDP) and compare the value of the GDP in different years.

Where Nominal GDP is the value of GDP calculated at current prices and Real GDP is the value of GDP calculated at constant base year prices. The GDP deflator is used to analyze economic trends and inflation, as well as to compare the GDP of different countries or regions in real terms.

==Example of GDP deflator==
Consider an economy with a base year of 2020, where the nominal GDP in 2021 is $1 trillion and the real GDP in 2021 is $800 billion. The GDP deflator for 2021 can be calculated as follows:

GDP Deflator = ($1,000,000,000,000 / $800,000,000,000) * 100 = 125

This means that the overall level of prices in 2021 was 25% higher than the level of prices in 2020. Therefore, the real GDP in 2021 was 25% lower than the nominal GDP in 2021. This indicates that the economy experienced inflation between 2020 and 2021.

==Formula of GDP deflator==
<math>GDP\ Deflator = \frac{Nominal\ GDP}{Real\ GDP} \cdot 100</math>

Where:
* Nominal GDP is the value of GDP calculated at current prices 
* Real GDP is the value of GDP calculated at constant base year prices

The GDP deflator is important for analyzing economic trends and inflation, as well as for comparing the GDP of different countries or regions in real terms. By comparing the GDP deflator in different years, one can determine the rate of inflation, economic growth, and relative economic performance of different regions or countries.

==When to use GDP deflator==
The GDP deflator can be used in a variety of ways: 
* To adjust the real Gross Domestic Product (GDP) for inflation over a given period of time. This allows for comparison of the value of the GDP in different years, taking into account the effect of inflation. 
* To analyze economic trends and inflation, as well as to compare the GDP of different countries or regions in real terms. 
* To compare the prices of different goods and services with the prices of the same goods and services in the base year.

The GDP deflator is an important tool for analyzing the economic health of a country or region. It can be used to adjust the real GDP for inflation over a given period of time, to analyze economic trends and inflation, and to compare the GDP of different countries or regions in real terms. It is also useful for comparing the prices of different goods and services with the prices of the same goods and services in the base year.

==Types of GDP deflator==
* The Nominal GDP Deflator is the ratio of nominal GDP to real GDP and measures the level of all prices relative to the base year, expressed as an index number. It is calculated as the ratio of current year nominal GDP to the base year real GDP, multiplied by 100.
* The Real GDP Deflator is the ratio of current year nominal GDP to the current year real GDP and is expressed as an index number. It measures the real output of goods and services relative to the base year. It is calculated as the ratio of current year nominal GDP to the current year real GDP, multiplied by 100.

==Steps of GDP deflator==
* Step one is to calculate the Nominal GDP, which is the current [[market]] value of all goods and services produced in an economy in a given time period. This can be obtained from [[government]] economic data.
* Step two is to calculate the Real GDP, which is the value of all goods and services produced in an economy in a given time period at base year prices. This can be obtained from government economic data.
* Step three is to divide the Nominal GDP by the Real GDP and then multiply the result by 100. This will give the GDP deflator, which is a measure of the level of prices of all new, domestically produced, final goods and services in an economy relative to a base year.

==Advantages of GDP deflator==
* The GDP deflator is a useful tool to measure the level of prices in an economy over a period of time. It is a comprehensive metric that takes into account the prices of all new, domestically produced, final goods and services, giving a more accurate picture of the economy than other measures of inflation, such as the [[Consumer]] [[Price]] Index (CPI).
* The GDP deflator is also useful for comparing the GDP of different countries or regions in real terms. By adjusting for inflation, the GDP deflator allows for a more accurate comparison of economic performance between different countries or regions, which would otherwise be distorted by the varying levels of inflation.
* Finally, the GDP deflator is a useful indicator to analyze economic trends and inflation. By tracking the changes in the GDP deflator, economists and [[policy makers]] are able to better understand the underlying dynamics of the economy and make more informed decisions.

==Limitations of GDP deflator==
* GDP deflator does not take into account the [[quality]] and variety of goods and services produced in a year. In some cases, the prices of goods and services may be adjusted upwards due to an increase in the quality of the products or services. This is not accounted for in the GDP deflator. 
* The GDP deflator fails to incorporate the prices of goods and services that are imported from other countries. This means that it may not accurately reflect the changes in the [[cost]] of living in an economy. 
* The GDP deflator does not take into account the changes in the prices of goods and services that are not produced domestically. This means that it may not accurately reflect the changes in the cost of living in an economy.

==Other approaches related to GDP deflator==
* The consumer price index (CPI) is another measure of inflation and prices. It is calculated by measuring the average price of a basket of goods and services purchased by a typical consumer. This index is used to adjust wages, pensions and other income sources to reflect changes in the cost of living.
* The [[producer]] price index (PPI) measures the average price of goods and services sold by producers. This index is used to analyze inflation and to adjust wholesale and retail prices. It can also be used to assess the impact of [[production]] costs on businesses.
* The GDP implicit price deflator (IPD) is a measure of the change in prices of the entire output of goods and services produced in an economy. It is calculated by dividing the nominal GDP by the real GDP and multiplying the result by 100.

In conclusion, the GDP deflator is a measure of the level of prices of all new, domestically produced, final goods and services in an economy relative to a base year. It is used to adjust the real GDP and compare the value of the GDP in different years. Other approaches related to GDP deflator include the consumer price index, the producer price index, and the GDP implicit price deflator.

==Suggested literature==
* Litra, A. (2009). ''[http://rs.unitbv.ro/BU2009/BULETIN2009/Series%20V/BULETIN%20V%20PDF/207%20LITRA%20ADRIANA%20_%20BUT%202009.pdf The inflation rate determined as a change in the Gdp deflator and in Cpi]''. Bulletin of the Transilvania University of Brasov. Economic Sciences. Series V, 2, 207.
* Das, A., & Senapati, M. (2007). ''[https://www.academia.edu/download/50609218/18-GDP_Deflator_Vis-A-Vis_other_Price_Indices_in_India_-_An_Exploratory_Study.pdf Gdp deflator vis-à-vis other price indices in India: an exploratory study]''. The Journal of income and wealth, 29(1), 3-20.

[[Category:Macroeconomics]]