data LFS from the UK to explore the reasons behind the difference in wages between the financial and non financial sector

data LFS from the UK  to explore the reasons behind the difference in wages between the financial and non financial sector.   the gap have increased.  regression analysis  explain  the difference are due to different characteristic of the workers in each sectors or due to different parameters like different reward to schooling or gender discrimination. im reading an article on the "Oaxaca-Blinder decomposition that I would like to apply to my project.  Stata for this project homogenized the labor force survey data for the years 1996-2002-2012 and will attach the file 2012 data comparing across years 1- Introduction graph to show the wage gab between the finance and non finance sector