More investment in Research and Development for better Education in the future?

The question in this paper is whether R&D efforts affect education performance in small classes. Merging two datasets collected from the PISA studies and the World Development Indicators and using Learning Bayesian Networks, we prove the existence of a statistical causal relationship between investment in R&D of a country and its education performance (PISA scores). We also prove that the effect of R\&D on Education is long term as a country has to invest at least 10 years before beginning to improve the level of young pupils.