Link between sector inequality and market competition

1. Statistical approach used by Rstudio or Sata for the data i will upload on two sectors (lawyers and architects) for around 5 countries,
2. Using PMR Index ( product Market Regulation) with OLS regression or unconditional quantile regression UQR.
3. Topics/Articles and references i will upload but mostly the work has to be done within individuals earning , making a comparison cross-country