*   R. Carter Hill, William E. Griffiths and Guay C. Lim,  
*   Principles of Econometrics, Third Edition, Wiley, 2008.

* Working with the Simple Linear Regression Model
* Chapters 2, 3, and 4.

* Data set on food expenditure and weekly income from a 
* random sample of 40 households.
SAMPLE 1 40
READ (food.shd) FOOD INCOME 

* The STAT command reports descriptive statistics (Table 2.1, p. 18)
STAT FOOD INCOME

* The OLS command reports a estimation results that include: 
*  - OLS parameter estimates (p. 22)
*  - the income elasticity evaluated at the sample means (p. 24)
*  - estimated standard errors (p. 36).
* The estimation results are summarized in Figure 2.9, p. 25.
* The OLS command also reports:
*  - the estimate of the error variance SIGMA**2 (p. 35)
*  - sum of squared residuals SSE (p. 24)
* The LIST option gives the predicted values and residuals (Table 2.3, p. 35).
*    The right portion of SHAZAM output from the LIST option shows
*    a crude residual plot.
* The PCOV option reports the estimated variances and covariances
*    of the least squares estimators (p. 35). 

* The OLS command also reports:
*  - t-test statistics for "tests of significance" and a p-value for
*    a 2-sided test (p. 63).   
*  - the R-square (p. 83).

OLS FOOD INCOME / LIST PCOV 

STOP