SAS Institute Alert Note SN-009467

From: SAS Technical Support (tsdlist@unx.sas.com)
Date: Mon Apr 14 2003 - 12:48:41 EDT

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    SN-009467 ***Alert Note***

    Multinomial probit results are incorrect when choice set has more than
    two alternatives

    Product: SAS/ETS
    Component: MDC procedure
    Priority: ALERT

      If the choice set has more than two alternatives, then the multinomial
      probit results are incorrect unless two (or more) alternatives are
      specified on the UNITVARIANCE= option.

      To circumvent the problem, specify at least two alternatives on the
      UNITVARIANCE= option on the MODEL statement.

    Keywords:
      mdc multinomial probit mprobit incorrout incorrstat choice alternative
      parameter estimates standard errors stderr unitvariance
      multinomial probit results are incorrect when choice set has more than
      two alternatives
      009467 9467

    SAS Note Revised On: Tue, 25 Feb 2003

    System Version Reported Version Fixed

    AIX 64 bit 8.2 TS2M0 9.1 TS1M0
    AIX 64 bit 9 TSM0 9.1 TS1M0
    AIX/6000 8.2 TS2M0
    VM/ESA (CMS) 8.2 TS2M0
    Compaq Tru64 UNIX 8.2 TS2M0 9.1 TS1M0
    Compaq Tru64 UNIX 9 TSM0 9.1 TS1M0
    HP-UX Operating Systems 8.2 TS2M0
    HP-UX Itanium 9 TSM0 9.1 TS1M0
    HP-UX 64 bit 8.2 TS2M0 9.1 TS1M0
    HP-UX 64 bit 9 TSM0 9.1 TS1M0
    Intel ABI 8.2 TS2M0
    Intel Itanium Processor Family(IPF) 9 TSM0 9.1 TS1M0
    Linux 8.2 TS2M0 9.1 TS1M0
    Linux 9 TSM0 9.1 TS1M0
    MIPS ABI 8.2 TS2M0
    OS/390 (MVS) 8.2 TS2M0 9.1 TS1M0
    OS/390 (MVS) 9 TSM0 9.1 TS1M0
    IBM OS/2 8.2 TS2M0
    Solaris 8.2 TS2M0
    Solaris 64 bit 8.2 TS2M0 9.1 TS1M0
    Solaris 64 bit 9 TSM0 9.1 TS1M0
    OpenVMS VAX 8.2 TS2M0
    OpenVMS Alpha 8.2 TS2M0 9.1 TS1M0
    OpenVMS Alpha 9 TSM0 9.1 TS1M0
    Windows NT 8.2 TS2M0 9.1 TS1M0
    Windows NT 8.2 TS2M0 9.1 TS1M0
    Windows NT 9 TSM0 9.1 TS1M0
    Windows 2000 Datacenter Server 8.2 TS2M0 9.1 TS1M0
    Windows 2000 Datacenter Server 8.2 TS2M0 9.1 TS1M0
    Windows 2000 Datacenter Server 9 TSM0 9.1 TS1M0
    Windows 2000 Professional 8.2 TS2M0 9.1 TS1M0
    Windows 2000 Professional 8.2 TS2M0 9.1 TS1M0
    Windows 2000 Professional 9 TSM0 9.1 TS1M0
    Windows 2000 Server and Advanced Server 8.2 TS2M0 9.1 TS1M0
    Windows 95 8.2 TS2M0
    Windows 98 8.2 TS2M0
    Windows ME 8.2 TS2M0
    Windows XP 8.2 TS2M0 9.1 TS1M0

    No Fixes Available

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