Syntax: COUNTREG Procedure

The COUNTREG procedure is controlled by the following statements:

PROC COUNTREG options ;

BOUNDS bound1 [ , bound2 ...] ;

BY variables ;

INIT initvalue1 [ , initvalue2 ...] ;

MODEL dependent variable = regressors / options ;

OUTPUT options ;

RESTRICT restriction1 [, restriction2 ...] ;

ZEROMODEL dependent variable zero-inflated regressors / options ;

There can only be one MODEL statement. The ZEROMODEL statement, if used, must appear after the MODEL statement.