The COUNTREG Procedure

SPATIALZEROEFFECTS Statement

SPATIALZEROEFFECTS <zero-inflation-spatial-effect-regressors> </option>;

The SPATIALZEROEFFECTS statement adds the spatially weighted zero-inflation-spatial-effect-regressors to regressors that are specified in the ZEROMODEL statement. For example, if you specify q variables in the SPATIALZEROEFFECTS statement, then each of q spatially weighted variables has a parameter to be estimated in the regression. Here, denotes the matrix and vector product between and a column vector whose entries are the values of , respectively. The spatial weights matrix comes from the data set that is specified in the WMAT= option in the PROC COUNTREG statement.

The "Parameter Estimates" table in the displayed output shows the estimates for spatially weighted explanatory variables; they are labeled with the prefix "Inf_W_". For example, if you specify z (a variable in your data set) as a spatial effect explanatory variable, then the "Parameter Estimates" table labels the corresponding parameter estimate "Inf_W_z".

You can specify the following option after a slash (/):

SELECT=INFO=<(selection-options)> SELECTVAR=INFO=<(selection-options)>: requests that the variable selection method be based on an information criterion. For a list of selection-options, see the section Options for Variable Selection Based on an Information Criterion. For more information about this type of variable selection, see the section Variable Selection Using an Information Criterion.

Last updated: August 25, 2017