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If the HECKIT option is specified in the PROC QLIM statement, and an OUTPUT statement and a BY statement are also specified, the following messages might be issued in the log:
The parameter estimates that are printed in the output are correct, but the output data set might contain fewer observations than the input data set.
When using SAS/ETS® 15.1 software in SAS® 9.4M6 (TS1M6) and later releases, you can avoid the problem by omitting the BY statement and processing each BY group separately. In releases prior to SAS/ETS 15.1, you can avoid the error by omitting the HECKIT option or by omitting the OUTPUT statement. If you omit the HECKIT option, the sample selection model is estimated using the default maximum likelihood estimation method instead of the Heckman's two-step method.
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Product Family | Product | System | Product Release | SAS Release | ||
Reported | Fixed* | Reported | Fixed* | |||
SAS System | SAS/ETS | z/OS | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 |
Microsoft® Windows® for x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8 Enterprise 32-bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8 Enterprise x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8 Pro 32-bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8 Pro x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8.1 Enterprise 32-bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8.1 Enterprise x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8.1 Pro 32-bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 8.1 Pro x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows 10 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows Server 2008 | 13.1 | 9.4 TS1M1 | ||||
Microsoft Windows Server 2008 R2 | 13.1 | 9.4 TS1M1 | ||||
Microsoft Windows Server 2008 for x64 | 13.1 | 9.4 TS1M1 | ||||
Microsoft Windows Server 2012 Datacenter | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows Server 2012 R2 Datacenter | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows Server 2012 R2 Std | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Microsoft Windows Server 2012 Std | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Enterprise 32 bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Enterprise x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Home Premium 32 bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Home Premium x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Professional 32 bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Professional x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Ultimate 32 bit | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Windows 7 Ultimate x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
64-bit Enabled AIX | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
64-bit Enabled Solaris | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
HP-UX IPF | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Linux for x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 | ||
Solaris for x64 | 13.1 | 15.3 | 9.4 TS1M1 | 9.4 TS1M8 |