In a market-clearing view of wage formation it is claimed that only ex
ternal factors, namely the conditions in the labor market, affect wage
s for a given type of labor in any one firm. However, there are severa
l non-market-clearing theories in which importance is given also to fi
rm-specific variables. In this article the effects of organizational f
actors on the wage level of the firm are studied. Using a data set wit
h several observations from each establishment, it is possible to dist
inguish within-establishment and between-establishment differences. Or
ganizational factors such as establishment size, the presence of a per
sonnel officer and managers' ownership are found to create wage differ
entials across establishments. The results are consistent with implica
tions from several non-market-clearing theories.