Religion affiliation BHPS Wave 7 and 9
I work with questions on religion and find some inconsistencies. Maybe you can help me in sorting this out.
I compare the BHPS 1997 and 1999 question oprlg1 "Which religion do you regard yourself as belonging to". I've checked the questionnaires for 1997 and 1999 and found out some weird inconsistencies between the questionnaires and what we see in the datasets.
In the 1999 questionnaire, there are 16 religion categories while in 1997 there are 14. This happened because category 04 "Presbyterian/Church of Scotland" in 1997 was divided into two in 1999 - 04 "Church of Scotland" and 05 "Free Church or Free Presbyterian Church of Scotland". Also, category 06 "Episcopalian" was added in 1999.
However, when I look at the data, I see another picture: options 04 "Church of Scotland", 05 "Free Church or Free Presbyterian Church of Scotland" and 06 "Episcopalian" presented in both waves. Also, options "Sikh" and "Other" didn't exist in 1997 but according to the questionnaires both options were presented in both waves.
Also, if we look at the religion distribution in 1997 and 1999, we can see weird changes even if we take into account only those people who participated in both waves. For example, there were 188 Baptist in 1997, which dropped to 85 in 1999.
Do you know what happened with this question between these two waves and why there are differences between the data and the questionaries?
#1 Updated by Yuliya Kazakova 2 months ago
I just wanted to add some comments on the religion distribution in 1997 and 1999.
I take only those people who participated in both waves, 1997 and 1999, and find weird changes.
For example, in 1997 75 people reported being Jewish. However, in 1999 - only 37.
Another example, in 1999 the 267 Methodist suddenly popped up while in 1997 only 61 people reported being Methodist (again I compare only those who presented both in 1997 and 1999 waves, so, I would expect a higher level of consistency)
Checking, for example, what those 267 Methodist reported in 1997, one of my colleagues suggested that probably there is a labeling mistake. This is what he says for these Methodists: Look at the Methodists: they were coded 5 in 1997 and 7 in 1999. In 1999, the Free Church / Free Presbyterians were coded 5. It appears to me that incorrect labels (those from 1999) have been attached to the values for 1997, because the 192 people in your table below would obviously have been Methodists.
Maybe this finding can help you.
#2 Updated by Stephanie Auty 2 months ago
- Private changed from Yes to No
- % Done changed from 0 to 20
- Assignee set to Stephanie Auty
- Status changed from New to In Progress
- Category set to Religion
Could you confirm whether you are using the harmonised dataset? If so, are you looking at the harmonised variables, bw_oprlg1, or the original BHPS variables, bw_oprlg1_bh?
#4 Updated by Stephanie Auty 2 months ago
- % Done changed from 20 to 70
- Target version set to BHPS
- Assignee changed from Stephanie Auty to Yuliya Kazakova
- Status changed from In Progress to Feedback
This appears to be a coding error in bg_oprlg1. I have referred it to the data team to correct it, but in the meantime you can use bg_oprlg1_bh which is the original BHPS variable, and recode it to match the Understanding Society codes as in bi_oprlg1.