Some variables including the item scores for the science test
administered in grade 9 have been mistakenly excluded from the SUF
version 10.0.0. However, they are still available in the previous
release (SUF version 9.0.0). Therefore, the R package NEPSscaling is
currently unable to estimate plausible values for the science test.
The missing variables will be included in the next SUF release.
A stata syntax that transfers the missing variables from the previous to the current suf version can be provided on request.