RCA: 3 types of Revealed Comparative Advantage Index (Balassa Bela,1965), in 3 dimensions (sector, region, and year).
RCA = RCA based on gross export; RCAva_f or RCAva_b = RCA based on value added export (forward or backward).Here, value added export means EXDVA = DVAex + DVArt, in EXin5VA (WWZ, 2013), both forward and backward.In OECDICIO2021, there are 45 sectors and 67 regions. In addition to the 45 sectors, there are 5 aggregated levels results (Total, goods, manufacture, all service and some services related to production).