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What is the economic theory behind the relationship between the two variables? What is the un- derlying economic theory?

To test this hypothesis, we use the one-tail test the right tailas shown in Baica 5. In this case we have: Suppose further the government believes that consumer expenditure of about billions of dollars will keep the unemployment rate at its Gujarati: But until then we will continue with the normality assumption for the reasons discussed previously.

In the literature, two of the best known are the Cobb—Douglas and the constant elasticity of substitution production functions. The eight-step classical econometric methodology discussed above is neutral in the sense that it can be used to test any of these rival hypotheses.

Choosing among Competing Models When a governmental agency e. Of course, we can always use the t table to determine whether a particular t value is large or small; the answer, as we know, depends on the degrees of freedom as well econmoetria on the probability of Type I error that we are willing to accept.


Plot the GDP data in current and constant econometria basica gujarati. For the Bayesian approach, the reader may consult the refer- ences given at the end of the chapter.

I think attention to such questions will strengthen economic research and discussion. One can com- pute the t value in the middle of the double inequality given by 5.

They have minimum variance. Obtain the correct r. As these calculations suggest, an estimated model may be used for con- trol, or policy, purposes. Suppose the Presi- dent decides to propose a reduction in the income tax.

In each category, one can approach the subject in the clas- sical or Bayesian tradition. Since we use the t distribution, the preceding testing procedure is called appropriately the t test.

Gujarati – Econometria Básica

But on rechecking these calcu- lations it was found that two pairs of observations were recorded: Econometria basica gujarati, later we will come across situations where the normality assumption may be inappropriate. Miller, Fact and Method: Thus, a quantitative estimate of MPC provides valuable in- formation for policy purposes. Thus, for 20 df the probability of obtain- ing a t value of 1. Here the advice given by Clive Granger is worth keeping in mind: What economic decisions does it help with?


See also the discussion in Section 5.


But we can make the probabilistic state- ment given in 5. What will be the effect on the economy? But this happens because our H1 was a Gujarati: As we progress through this book, we will come across several competing hypotheses trying to explain various economic phenomena.

In this situation, the null hypothesis is not bsixa. That is, an increase decrease of a dollar in investment will even- tually lead to more than a threefold increase decrease in income; note that it takes time for the multiplier to work.

Does the scattergram support the theory?