The distribution of educational experience in countries belonging to the Organization for Economic Co-operation and Development (OECD) is presented in this paper. It covers those sections of the population who have terminated formal education. Educational attainment is measured in two ways: in terms of years of educational experience and by estimating the value of these years of education at replacement cost. The estimates are broken down by sex and by age cohort, so that differences in education between men and women and between generations can be measured. The tables also show the dispersion in educational levels between persons, and trends in the level of educational attainment over time. General conclusions drawn from the data gathered from national censuses and surveys for 18 countries are: (1) the range between countries in per capita stock of education is very wide, but there is a tendency toward convergence; (2) inequality between males and females is still important in some countries, but inequalities diminish over time; (3) inequalities in education between young and old are bigger than the gap between the sexes; (4) inequality between persons is very big and the process of educational expansion is not always equalizing, particularly once countries get past the stage where illiteracy is abolished; and (5) efforts to improve the international comparability should be made. (Author/AM)