"The level of union density in Norway is medium high, in contrast to the other Nordic countries where high density levels are supported by unemployment insurance funds. Developments in union density over time are stable in Norway, contrary to developments in most western European countries outside the Nordic region. This article traces the effects of unemployment insurance funds by comparing density levels in Norway with those in Finland and Sweden. In addition, the stability witnessed in union density in Norway over time is a particularly puzzling phenomenon, and the authors seek to explain it on the basis of specific institutional and labour market factors."

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