Understanding Society User Support

Hi,

Some versions of the USOC documentation include mention of a 'net household income' variable (a_fihhmnnet_dv - see e.g. https://www.understandingsociety.ac.uk/files/data/documentation/wave1/User_manual_Understanding_Society_Wave_1.pdf, P32). However, these variables do not exist in any of the hhresp databases.

Were there problems with these variables, resulting in their removal? Or alternatively are they only provide with the special license data?

Best,
Robert de Vries

P.S. I may have asked this question before, if so apologies.