.-
help for ^suprob^                                                  (STB-33: sg61)
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Estimate seemingly unrelated bivariate probit and nested probit models
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	^suprob^ equation1 equation2 [^if^ exp] [^in^ range] [^,^ ^nochi^
                 ^l^evel^(^#^)^ ^sc^ore^(^score1 score2^)^ ^tr^ace ^r^obust
                 ^cl^uster^(^clustervar^)^ ^ne^sted ^nolo^g ]

^suprob^ shares the features of all estimation commands; see help @est@.

To reset problem-size limits, see help @matsize@.


Description
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^suprob^ estimates seemingly unrelated bivariate probit nested probit models
where you have two dependent binary variables each with a list of independent
variables.  For bivariate probit models with a common list of independent 
variables, you may also use ^biprob^.


Options
-------

^nochi^ specifies that a constant only model should not be fit.  For some 
    problems, the constant only model can take many iterations to converge.
    Skipping the fit of the constant only model means that there will be no
    chi-squared or pseudo r-squared values reported in the output. 

^level(^#^)^ specifies the confidence level, in percent, for the confidence 
    intervals of the coefficients; see help @level@.

^score(score1 score2)^ specifies that the scores for a robust estimate of 
    variance should be saved in the new variables ^score1^ and ^score2^.  The
    ^score1^ variable will contain the scores for the bivariate estimation and
    the ^score2^ variable will contain the scores for the correlation
    parameter equation.  This option implies specification of the ^score^
    option.

^trace^ specifies that the trace of the iterations should be presented.

^robust^ specifies that the sandwich estimate of variance should be calculated
    and the robust standard errors presented for the estimation.

^cluster(clustervar)^ specifies that the robust estimate of variance should be
    adjusted for clustering on the groups specified by the values of the 
    ^clustervar^ variable.

^nested^ specifies that a nested probit model should be estimated.  The
    ^robust^, ^score^ and ^cluster^ options are not available for nested
    models.

^nolog^ specifies that the iteration log should be suppresed.

Examples
--------

        . ^eq priv ptax years^
        . ^eq vote income years^
        . ^suprob priv vote^


Also see
--------

    STB: STB-33, sg61
On-line: help @biprob@, if installed


Author
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    James W. Hardin
    Stata Corporation
    jwh@@stata.com