This paper presents an analysis of wage formation in the Norwegian private
sector using data for individual workers matched with firm level informatio
n and regional unemployment. A key issue is to test whether or not firm spe
cific variables affect individual wages after controlling for individual sp
ecific factors and working conditions. The results imply positive effects o
f firm specific profitability and firm size. The elasticity of wages with r
espect to value added per worker and firm size is 5% and 3.3%, respectively
. Empirical evidence of a downward sloping regional wage curve is also repo
rted, while there is no support of the hypothesis of compensating wage diff
erentials. Since data for three levels of aggregation are used, the OLS est
imates of the standard errors are downward biased. Therefore, results using
a random effects model are also reported, taking the multi-level structure
of the data into account.