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α: calibrated so average coauthorship-adjusted count equals average raw count
type="main" xml:id="ecca12130-abs-0001"> <p>We estimate effects on educational outcomes from the expansion of the independent school sector in Sweden, which followed as a consequence of the radical 1992 voucher reform. Using variation in this expansion across municipalities, we find that an increase in the share of independent school students improves average short- and long-run outcomes, explained primarily by external effects (e.g. school competition). For most outcomes, we observe significant effects first a decade after the reform. By using regional level TIMSS data, we can reconcile our results with the negative national trend for Swedish students in international achievement tests.