Write a Short Essay About the Overidentifying Restrictions Test

question 22

Essay

Write a short essay about the Overidentifying Restrictions Test. What is meant exactly by "overidentification?" State the null hypothesis. Describe how to calculate the J-statistic and what its distribution is. Use an example of two instruments and one endogenous variable to explain under what situation the test will be likely to reject the null hypothesis. What does this example tell you about the exactly identified case? If your variables pass the test, is this sufficient for these variables to be good instruments?

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Definitions:

Anti-Recession Policies

Government measures intended to combat economic downturns, involving fiscal and monetary actions to stimulate the economy.

Equation of Exchange

An economic equation that describes the relationship between the money supply, velocity of money, price level, and an economy's output.

GDP Rise

An increase in the Gross Domestic Product, indicating growth in the economy and the production of goods and services.

Velocity

In economic terms, the rate at which money is exchanged from one transaction to another and how much a unit of currency is used in a given period.