Doctor of Philosophy. in Physics. Master of Science in Economics, Warsaw (Poland) School of Economics, 1953. Doctor of Philosophy in Economics, Warsaw (Poland) School of Economics, 1963.
Doctor of Science in Demography, Warsaw (Poland) School of Economics, 1969.
Assistant, senior lecturer department statistics SGPIS, Warsaw, 1950-1963, assistant professor, chair statistics, 1966-1971. Senior research fellow Institute Statistics, Legon, Ghana, 1963-1966. Regional demographic advisor Population Center United Nations, Addis Ababa, Ethiopia, 1971-1973, demographer division social affairs Geneva, Switzerland, 1973-1977.
Director, professor Institute Statistics and Demography, Warsaw, since 1977. President Committee of Demographic Sciences, Warsaw, 1981-1985, 91-93. Advisory board Central Statistical Office, Warsaw, since 1977.
Author 16 books, including Demographic Projection of Poland up to 1975, 1959, Fundamentals of Demographic Analysis, 1963, Births, Deaths and Structure of the Polish Population 1950-2000, 1964, (monograph) Seasonality of Vital Events in Selected Towns of Ghana, 1966, Stable Population Model, 1969, Demography, 1999, 5th edition. Also over 100 articles.
Member Polish Academy of Sciences (elected chairman social science division 1999-2002), Academia Europaea.
Married Janina Blajer, January 26, 1957. Children: Krzysztof, Dorota.