For 11 of the 27 countries in the analysis the results point to a decrease in the value attached to education over time, hence giving support to the hypothesis of educational credential inflation (Boudon 1974), while in the case of Austria (as mentioned, the country with the lowest association) an increase was found.
exploredata-ZA5890_VarEDUCYRS exploredata-ZA5890_VarISCO88