Understanding Society User Support

Dear USoc team,

Like some previous questions, this question is about job changes. In the Understanding Society waves, there is a variable jbsamr , which to my understanding reports whether the respondent has changed employer since the previous wave – whether they are with a different employer in wave t than in wave t-1.

I found a similar variable in waves 16-18 of the BHPS, called jbempr. My understanding is that this measures the same thing as jbsamr in these BHPS waves.

My question is, in waves 1-15 of the BHPS, is there a variable that describes whether the respondent has changed employer since the previous wave? Or does the fact that I haven't been able to find one mean that it doesn't exist?

Best wishes,
Kat