The LSYPE gross weekly income was reported by the main parent at wave 1 (age 13/14) and is again log transformed.
The later born LSYPE reflects the current ethnic make-up of England and includes sample boosts and weights to ensure representation.
The LSYPE contains Key Stage 2 linked data from the National Pupil Database.
In LSYPE the KS2 mathematics test is marked out of 100 and consists of three separate tests: a calculator paper, a non-calculator paper and a mental arithmetic test.
Measured at age 16 in the BCS and age 14 in the LSYPE, young people were asked whether they planned to stay on in post-compulsory schooling.
Measured at age 10 in the BCS and age 14 in the LSYPE, parents were also asked about their educational aspirations for their children.
In the LSYPE, this is a score based on summed answers to twelve attitudinal questions measured at age 14.
This is a binary indicator of whether a young person has a part-time job measured at age 16 in the BCS and 14 in the LSYPE.
This variable is a dichotomous indicator of whether a young person truants frequently (coded 1) or not, measured at age 16 in the BCS and 14 in the LSYPE.
Measured at age 10 in the BCS and 14 in the LSYPE, (5) this variable captures the proportion of pupils in the cohort member's school who are not from low SES families (BCS) or not eligible for free school meals (LSYPE) and ranges from 0 to 1.
Table 1 summarises the main economic status of young people in the two cohorts when they are aged 18, which in the BCS was in 1988 and in the LSYPE was in 2009.
Compared to BCS, considerably more young people in LSYPE were categorised as being NEET (16.3 per cent), fewer young people were in employment, and more participated in full-time education at age 18.