Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), 
HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), 
HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)Scientific Software International (SSI) publishes statistical data analysis software: LISREL (structural equation model/SEM, survey generalized linear model/SGLIM), 
HLM (hierarchical linear modeling, multilevel model), SuperMix (mixed models, mixed-effects program, MIXREG, MIXOR, MIXNO and MIXPREG) and Item Response Theory/IRT (BILOG-MG, MULTILOG, PARSCALE)

  Academic and Non-Academic Pricing

LISREL, HLM, AUXAL, and SuperMix for Windows

The license prices for LISREL, HLM, AUXAL, and SuperMix for Windows are the same for both academic and non-academic end users.

BILOG-MG, IRTPRO, and PARSCALE for Windows

Academic and non-academic licenses

  • SSI, Inc. offers academic and non-academic licenses for BILOG-MG, IRTPRO, and PARSCALE for Windows.
  • Academic licenses apply to end users that intend to use the software exclusively for academic research (publications in academic journals and papers at academic conferences) and instruction.
  • Non-academic licenses apply to end users that intend to use the software commercially or for assessment.
  • It is possible that an end user at an academic organization needs a non-academic license.
  • It is possible that an end user at a non-academic organization needs an academic license. In this case, SSI, Inc. requires an official letter from the end user stating that the software is to be used exclusively for academic research and not for any form of assessment or testing. This letter should be sent via email to sales@ssicentral.com.

Examples of non-academic end users

  • A professional organization that develops, calibrates, and scores licensing exams for their membership or for other in-house assessments.
  • An organization that contracts with third parties to do test development and test scoring, which is generally done for a fee
  • An organization that develops and maintains item banks and scores subjects in a production environment for internal use or for third parties.

Ordering academic licenses

Academic licenses for BILOG-MG, IRTPRO, and PARSCALE for Windows can be purchased by academic end users with legitimate academic email addresses via the SSI Shopping Cart.

Ordering non-academic licenses

Single 12 month non-academic licenses for BILOG-MG, IRTPRO, and PARSCALE for Windows can be purchased via the SSI Shopping Cart.


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