up-to-date skills are more productive and have more potential to remain employed. However, the processes that influence skill obsolescence, have largely been neglected in labor economics. It was in the 1990s that skill issues came to the top of the agenda, because of the general awareness of the rapid technological developments that affect the demand for human capital. Although the analysis of skill-biased technological change is at the heart of this debate, in recent years, the literature has become wider than simple consideration of this aspect and has started to embrace other causes of obsolescence. The papers in this volume are selected from the papers presented at a conference on Understanding Skills Obsolescence. They advance both the theoretical and empirical understanding of the causes and the effects of skills obsolescence.

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