The MODEL statement specifies the dependent (response) variable and the independent (regressor) variables or effects. The dependent variable must be numeric. Each term in a MODEL statement, called an effect, is a variable or a combination of variables. You can specify an effect with a variable name or with special notation by using variable names and operators. For more information about how to specify an effect, see the section Specification of Effects in Chapter 41, The GLM Procedure.
Only one MODEL statement is allowed for each PROC SURVEYREG statement. If you specify more than one MODEL statement, the procedure uses the first model and ignores the rest.
You can specify the following options in the MODEL statement after a slash (/):
requests confidence limits for the parameter estimates. The SURVEYREG procedure determines the confidence coefficient by using the ALPHA= option, which by default equals 0.05 and produces 95% confidence bounds. The CLPARM option also requests confidence limits for all the estimable linear functions of regression parameters in the ESTIMATE statements.
specifies the denominator degrees of freedom for the F tests and the degrees of freedom for the t tests. For details about the default denominator degrees of freedom, see the section Denominator Degrees of Freedom for details.
displays the inverse or the generalized inverse of the matrix. When there is a WEIGHT variable, the procedure displays the inverse or the generalized inverse of the matrix, where is the diagonal matrix constructed from WEIGHT variable values.
If ABS() is greater than *value, then is declared nonestimable. Here, is the matrix . The value must be between 0 and 1; the default is .
displays a solution to the normal equations, which are the parameter estimates. The SOLUTION option is useful only when you use a CLASS statement. If you do not specify a CLASS statement, PROC SURVEYREG displays parameter estimates by default. But if you specify a CLASS statement, PROC SURVEYREG does not display parameter estimates unless you also specify the SOLUTION option.
specifies whether to use degrees of freedom adjustment in the computation of the matrix for the variance estimation. If you do not specify the VADJUST= option, by default, PROC SURVEYREG uses the degrees-of-freedom adjustment that is equivalent to the VARADJ=DF option. If you do not want to use this variance adjustment, you can specify the VADJUST=NONE option.
displays the matrix, or the matrix when there is a WEIGHT variable, where is the diagonal matrix constructed from WEIGHT variable values. The X option also displays the crossproducts vector or .