Pre-print, Working paper: This paper investigates the relationships between new technologies, innovative workplace practices and the age structure of the workforce in a static labour demand framework. As a first step, we assume that, in the short run, the only variable factor is the number of workers in different age groups. We then assume, as a second step that the number of workers by age and skill group may vary. The data we use come from several sources: the Changements Organisationnels et Informatisation survey (COI), the Déclarations Annuelles des Données Sociales (DADS) and the Bénéfices Réels Normaux database (BRN). We find evidence that the wage-bill share of older workers is lower in innovative firms. This age bias affects is also evidenced within occupational groups, thus suggesting that skills do not completely protect workers against the labour-market consequences of ageing.