The PRINTS findings for access to education in Serbia suggest the need for a closer look at all points of transition to secondary and tertiary education. A Pearson product-moment correlation analysis carried out in the course of INTES methodology development used data from Ihe Corruption Barometer of Transparency International (the extent to which respondents perceive the education system in a specific country to be affected by corruption), and Ihe mean reading score in PISA 2009 adjusted for the country's socio-economic profile. The square of the correlation co-efficient shows a negative correlation between learning outcomes and perceived levels of corruption.9-,(> While numerous questions need to be answered before such analysis becomes sufliciently reliable, the tentative answers are good enough for orientation and support when working with assumptions about causality.