Selected OLS Command Options ANOVA Prints an analysis of variance table and an F-statistic for the null hypothesis that all slope coefficients are zero. This option also prints a variety of model selection tests (including the Akaike information criterion and the Schwarz criterion). DLAG Computes Durbin's h statistic as a test for AR(1) errors when a lagged dependent variable is included as an explanatory variable. The lagged dependent variable must be the first variable listed following the dependent variable on the OLS command. DWPVALUE Computes the p-value for the Durbin-Watson test statistic. HETCOV Computes standard errors that are adjusted for heteroskedastic errors using White's heteroskedastic-consistent covariance matrix calculation. LIST Lists and plots the residuals and the predicted values of the dependent variable. LOGLIN Used for semi-logarithmic models when the dependent variable is in log form but the explanatory variables are in levels. Note that the dependent variable must be transformed to log form prior to OLS estimation. When this option is used the elasticities at sample means are computed appropriately. When the RSTAT option is also specified the output will report the R-square between antilogs observed and predicted. LOGLOG Used when the dependent variable and all explanatory variables are transformed to logarithms. Note: the data must be transformed by the user with appropriate GENR commands prior to OLS estimation. When this option is used the elasticities are reported as the estimated coefficients. When the RSTAT option is also specified the output will report the R-square between antilogs observed and predicted. NOCONSTANT Forces NO constant (no intercept coefficient) in the regression. By default, SHAZAM automatically includes an intercept coefficient in the regression and this is given the name CONSTANT. On the SHAZAM output, the intercept estimate is listed as the final coefficient estimate. PCOV Prints the estimated covariance matrix of the parameter estimates. Note that this should not be confused with the covariance matrix of the variables that is obtained with the STAT command. RESTRICT Implements restricted least squares estimation. Linear restrictions are specified with RESTRICT commands that follow the OLS command. RSTAT Lists residual statistics including the Durbin-Watson statistic. Options that save results COEF= Saves the estimated coefficients in the variable specfied. For example, the option COEF=BETA will save the estimated coefficients in the variable with the name BETA. The intercept parameter is saved as the final value. PREDICT= Saves the predicted values in the variable specified. RESID= Saves the estimated residuals in the variable specified. STDERR= Saves the estimated standard errors of the coefficient estimates in the variable specified. TRATIO= Saves the t-ratios in the variable specified. Option for Weighted Least Squares estimation WEIGHT= Specifies the weight variable to be used for weighted least squares regression. There are many other useful options on the OLS command. The complete description is in the SHAZAM User's Reference Manual. [SHAZAM Guide home]