Commuting to work (jsttwt)
I want to use the variable jsttwt="minutes spent travelling to work" in the BHPS/UKHLS but I am experiencing some problems. In particular, I find that on average more than 95% of the times the variable is "missing" (i.e. takes values equal to inapplicable, proxy, dont know, etc).
However, if I look at the database and variables description online, the understanding society website reports very different figures! For example, for the last wave of the BHPS online it is reported that the variable is different from missing 46.26% of the times (see: https://www.understandingsociety.ac.uk/documentation/mainstage/dataset-documentation/wave/b18/datafile/br_indresp/variable/br_jbttwt) while in the inderesp_r dta I have downloaded the percentage of nonmissing values is considerably smaller - while the number of observations is the same so I am pretty sure I am looking at the right dta.
Can you please help me clarifying the matter?
Thanks a lot for your support!