This paper analyzes the role of skill-biased technological progress on the recent changes in the occupation al structure of Spanish manufacturing employment. Our dataset consists of a panel of Spanish manufacturing firms during the period 1986-1991. We confirm a puzzle that has been found in other OECD countries: investment in capital inputs is clearly procyclical, but destruction of unskilled jobs and creation of skilled jobs have been concentrated during the recession. However, we also find that the number of firms who invest by first time in technological capital has been clearly countercyclical. Based on this evidence, we estimate a dynanllc model where firms take discrete decisions about what labor and capital inputs to use, and contin...