In theoretical discussions about the relation between education and trainin
g, the question of complementarity or substitutability between these two di
fferent forms of human capital is raised. If initial education and industri
al training are substitutes, overeducated workers will participate less in
additional training than workers who are adequately educated. It could expl
ain the persistence of overeducation and implies that the social wastage of
overeducation will be less. On the other hand, if initial education and in
dustrial training are complements, existing differences in human capital wi
ll only increase by industrial training, implying the risk for some workers
of 'missing the boat'. Supplementary to Groot we not only look at the impa
ct of over- and undereducation (level) but also at non-matching fields of s
tudies and the 'narrowness' of types of education. A sample of labour marke
t entrants was used, so we did not have to cope with the disturbing influen
ce of other forms of human capital: life and labour market experience. The
paper gives evidence in support of both substitutability and complementarit
y between initial education and firm training. (C) 2000 Elsevier Science Lt
d. All rights reserved. JEL classification: I21; J24.