Syntax: COUNTREG Procedure

The COUNTREG procedure is controlled by the following statements:

PROC COUNTREG options ;

BOUNDS bound1 < , bound2 ...> ;

BY variables ;

CLASS variables ;

FREQ variable ;

INIT initvalue1 <, initvalue2 ...> ;

MODEL dependent variable = regressors / options ;

NLOPTIONS options ;

OUTPUT options ;

RESTRICT restriction1 <, restriction2 ...> ;

WEIGHT variable ;

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, and the CLASS statement must precede the MODEL statement. If a FREQ or WEIGHT statement is specified more than once, the variable specified in the first instance is used.