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WesVar Version 4 is now available for purchase from Westat. The new features included in Version 4 can be found at New Features in Version 4. For more information on purchasing WesVar Version 4, see Three Types of Licenses, the Pricing Schedule, and the License Calculator. To purchase WesVar, request a price quote, or get more information, Contact Us. Documentation for version 4.2 is also available here.

As a service to students and users without the resources to purchase the more complete commercial version 4, Westat continues to offer Version 2 for free downloading. This version includes facilities for creating some limited types of replicate weights, running tables, and fitting regression models. Documentation for version 2 is also available here.