By OECD - Organisation for Economic Co-operation and Development
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Extra info for PISA The High Cost of Low Educational Performance: The Long-run Economic Impact of Improving PISA Outcomes
Example text
Department of Education (2008) © OECD 2010 The High Cost of Low Educational Performance 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 200 1969 225 Annex A Therefore, to compare performance on the ISATs across tests and thus over time, the performance of different countries on different tests is projected onto a common metric. For that, it is necessary to develop a common metric both for the level and for the variation of test performance.
16. The sample with complete data includes 23 OECD countries. The High Cost of Low Educational Performance © OECD 2010 31 17. The basic statistical models use school attainment in 1960 but combine that with average test scores over the entire period. However, the results are unchanged by using average years of attainment across the period. 18. The prior estimates rely not just on OECD countries but on the full set of countries in Hanushek and Kimko (2000) and Hanushek and Woessmann (2008). 19. 47 (although the institutional measures do not enter significantly in the OECD-sample estimation).
The trends in growth rates are determined in a similar manner: annual growth rates are regressed on a time trend. The plot provides the pattern of slopes in the test regression to slopes in the growth rate regression. Hanushek and Woessmann (2009) consider more complicated statistical relationships, but the overall results hold. 26. It is possible but unlikely that the changes in growth rates suffer the same reverse causality concerns suggested previously. A change in growth rates can occur at low levels of growth and in lower-income economies.