PROC CALIS: MODEL Statement :: SAS/STAT(R) 9.22 User's Guide

The CALIS Procedure

MODEL Statement

MODEL i </ options> ;

where i is an assigned model number between 1 and 9999, inclusively.

A MODEL statement signifies the beginning of a model specification block and designates a model number for the model. All main and subsidiary model specification statements after a MODEL statement belong in that model until another MODEL or GROUP statement is encountered.

The MODEL statement itself does not serve the purpose of model specification, which is actually done by the main and subsidiary model specification statements that follow it. The MODEL statement serves as a "place-holder" of specification of a single model. It also makes the reference to a model easier with an assigned model number. For example, consider the following statements:

proc calis;
   group 1 / data=women_data;
   group 2 / data=men_data;
   model 1 / group=1 label='Women Model';
      {model 1 specification here}
   model 2 / group=2 label='Men Model';
      {model 2 specification here}
   run;

This example illustrates a two-group analysis with two models. One is model 1 labeled as 'Women Model' in a MODEL statement. Another is model 2 labeled as 'Men Model' in another MODEL statement. The two groups, group 1 and group 2, as defined in two separate GROUP statements, are fitted by model 1 and model 2, respectively, as indicated by the GROUP= option of the MODEL statements. Within the scope of model 1, you provide model specification statements by using the main and subsidiary model specification statements. Usually, one of the following main model specification statements is used: FACTOR, LINEQS, LISMOD, MSTRUCT, PATH, RAM, or REFMODEL. Similarly, you provide another set of model specification statements within the scope of model 2.

Hence, for an analysis with a single group, the use of the MODEL statement is not necessary because the model that fits the group is unambiguous.

You can set model-specific options in each MODEL statement. All but two of these options are also available in the PROC CALIS statement. If you set these options in the PROC CALIS statement, they apply to all models, unless you respecify them in the local MODEL statements. If you want to apply some options only to a particular model, specify these options in the MODEL statement that corresponds to that model.

You can also set group-specific options in the MODEL statement. These group options apply to the groups that are specified in GROUP= option of the MODEL statement. See the section Options Available in the GROUP and PROC CALIS Statements for a detailed descriptions of these group options.

Options Available Only in the MODEL Statement

LABEL | NAME=name: specifies a label for the model. You can use any valid SAS names up to 256 characters for labels. You can also use quoted strings for labels.
GROUP | GROUPS=int-list: specifies a list of integers which represent the groups to be fitted by the model.

Options Available in the MODEL and PROC CALIS Statements

The following options are available in the MODEL and PROC CALIS statements. If you specify these options in the PROC CALIS statement, they are transferred to all MODEL statements. These options might be overwritten by the respecifications in the local MODEL statements.

Option	Description
DEMPHAS=	Emphasizes the diagonal entries
EFFPART \| TOTEFF	Displays total, direct, and indirect effects
EXTENDPATH \| GENPATH	Displays the extended path estimates (experimental)
INEST=	Specifies the data set that contains the initial values and constraints
INMODEL \| INRAM=	Specifies the data set that contains the model specifications
MEANSTR	Analyzes the mean structures
MODIFICATION	Computes modification indices
NOMEANSTR	Deactivates the inherited MEANSTR option
NOMOD	Suppresses modification indices
NOORDERSPEC	Displays model specifications and results according to the input order
NOPARMNAME	Suppresses the printing of parameter names in results
NOSTAND	Suppresses the standardized output
NOSTDERR	Suppresses standard error computations
ORDERSPEC	Orders the model output displays according to the parameter types within each model
OUTEST=	Specifies the data set that outputs the estimates and their covariance matrix
OUTMODEL \| OUTRAM=	Specifies the output data set for storing the model specification and results
PARMNAME	Displays parameter names in model specifications and results
PDETERM	Computes the determination coefficients
PESTIM	Prints parameter estimates
PINITIAL	Prints initial pattern and values
PLATCOV	Computes the latent variable covariances and scoring coefficients
PRIMAT	Displays results in matrix forms
READADDPARM	Instructs generated default parameters be read in the INMODEL= data set
STDERR	Computes the standard errors

Options Available in MODEL, GROUP, and PROC CALIS Statements

Some options in the GROUP statement can also be specified in the MODEL statements. Group options that are specified the MODEL statements are transferred to the GROUP statements that define the groups that are fitted by the associated models in the MODEL statements. This is a little more convenient than setting the common group options individually in the GROUP statements for all fitted groups by a model. See the section Options Available in GROUP, MODEL, and PROC CALIS Statements for a reference of these options.

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