Why is there a discrepancy between SG and Urbanity fields in the DELTA 2019 quick reference guide (e.g. E1 = Suburban)?

The advantage of DELTA is that there’s more detail than the 68 PRIZM segments. So, we may have taken a segment from DELTA that is 60% suburban and 40% urban and combined it with a segment that is 70% urban and 30% suburban and in the end it becomes a PRIZM segment that is 60% Urban and 40% Suburban. We can call it Urban for the Social Group at the PRIZM level and identify that the 2 DELTA segments come from different urbanities, hence the discrepancy in the quick reference guide.

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