Specifies the input data set

COUNTREG

DATA=

Writes parameter estimates to an output data set

COUNTREG

OUTEST=

Writes estimates of and to an output data set

OUTPUT

OUT=

Specifies BY-group processing

BY

Specifies classification variables

CLASS

Specifies a frequency variable

FREQ

Specifies a weight variable

WEIGHT

Prints the correlation matrix of the estimates

MODEL

CORRB

Prints the covariance matrix of the estimates

MODEL

COVB

Prints a summary iteration listing

MODEL

ITPRINT

Suppresses the normal printed output

COUNTREG

NOPRINT

Requests all printing options

MODEL

PRINTALL

Specifies maximum number of iterations allowed

MODEL

MAXITER=

Selects the iterative minimization method to use

COUNTREG

METHOD=

Sets boundary restrictions on parameters

BOUNDS

Sets initial values for parameters

INIT

Sets linear restrictions on parameters

RESTRICT

Specifies the optimization options

NLOPTIONS

See Chapter 6, Nonlinear Optimization Methods

Specifies the type of model

MODEL

DIST=

Specifies the type of model

COUNTREG

DIST=

Specifies the type of covariance matrix

MODEL

COVEST=

Suppresses the intercept parameter

MODEL

NOINT

Specifies the offset variable

MODEL

OFFSET=

Specifies the zero-inflated offset variable

ZEROMODEL

OFFSET=

Specifies the zero-inflated link function

ZEROMODEL

LINK=

Includes covariances in the OUTEST= data set

COUNTREG

COVOUT

Outputs the probability of response variable taking the current value

OUTPUT

PROB=

Outputs probabilities for particular response values

OUTPUT

PROBCOUNT()

Outputs expected value of response variable

OUTPUT

PRED=

Outputs estimates of XBeta

OUTPUT

XBETA=

Outputs estimates of ZGamma

OUTPUT

ZGAMMA=

Outputs the probability of response variable taking a zero value as a result of the zero-generating process

OUTPUT

PROBZERO=