In the following years the distribution remained roughly stable, but a slightly increasing trend was found in the top grade level group. 4 DATA We use a population sample of students graduating from upper secondary schools in Sweden in the years 2001–2004 ( n = 299,459).
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The sentences
The results are quite stable over the different specifications (columns 1–5), but only weakly significant (significant on the 10% level) when tracks are added in specification (3).