codified knowledge determine the returns on different occupational choices in different environments. The data are drawn from … privileged access to tacit knowledge, thus confirming previous analyses on the role of social learning (e.g. Guiso and Schivardi …, 2005). On the other hand, our results suggest that the returns on codified knowledge in entrepreneurial activities may …

national innovation systems. The study also analyses the factors behind this industry's poor productivity growth. A scenario …

. The business services industry has an important role in the national innovation system and in knowledge spillovers to … other industries. The innovation contribution of business services to the rest of the economy may countervail the effect of … strengthening its role in knowledge spillovers to client industries. …