This paper analyses the major developments in the structure of male an
d female pay in Britain between 1973 and 1991. These are the narrowing
of the gender pay gap and the increasing inequality of male and femal
e earnings. The first innovation is decomposing the changing gender pa
y gap into three components: prices, characteristics, and unmeasured (
residual) effects at any percentile level of interest to the investiga
tor. An important role for prices in narrowing the gender gap is found
and the second innovation is a method to identify which prices are cr
itical. Qualifications turn out to be the key factor.