SAID 1.1 Release Notes
This release fixes a bug in the calculation of the variance inflation factor (VIF). 
Previously, the explanatory variable linear regressions used in calculating the VIF 
did not exclude the observations that were missing or excluded in explanatory/response 
multiple linear regressions (MLR). SAID now excludes the observations that are missing 
or excluded in the response/explanatory MLRs from the explanatory linear regressions 
that are used in calculating the VIF.