The article uses the definition that "same rank" == "same work", which is ridiculous for many reasons, one in particular being that title often corresponds to a pay level for an area of work covered by a ladder of such titles so by definition it will be true that such a gap is insignificant.
> According to data for 8.7m employees worldwide gathered by Korn Ferry, a consultancy, women in Britain make just 1% less than men who have the same function and level at the same employer.
> According to data for 8.7m employees worldwide gathered by Korn Ferry, a consultancy, women in Britain make just 1% less than men who have the same function and level at the same employer.