CORRECTION: The ONS weblink from 6th October 2015 which Mr Portes claimed was Dr Perkins’s data source for the numbers of children in working, mixed and workless households is incorrect since The Welfare Trait was printed in September 2015 and was published in November 2015. This timeline makes it impossible for the book to have cited ONS source data from 6th October 2015. The actual source data used by Dr Perkins in The Welfare Trait was published by the ONS on 25th March 2014 and is shown at the ONS weblink below (see dataset ref 002530).
As can be seen at this weblink, line 11 of the Excel spreadsheet states “Households here refer to those where at least one occupant is aged 16-64 and at least one occupant is aged 0-15”. This fact renders incorrect Mr Portes’s allegation that the ONS source data used by Dr Perkins does not contain the information that each household shown contained “at least one occupant is aged 0-15”.