We investigate and interpret some of the properties of a multi-sectoral growth model with endogenous embodied technical change in the light of the ongoing debate on the viability of an IT based growth regime. In particular, we illustrate the two main views of the 1995-2000 IT boom in the USA. If it only comes from productivity gains in the production of hardware and/or softwares, and even though these gains are permanent, the story could be just one of temporary massive capital deepening and no long term growth effect. In contrast, if this boom relies on productivity gains in R&D, there is room for a permanent IT growth regime associated with a permanent accumulation of both hardware and software.

This paper explores the relationship between employment protection legislation (EPL) and the share of employment in the IT sector. Evidence from several OECD countries suggests that the importance of the IT sector is smaller in economies with high levels of EPL than in economies with low levels. This shows up in the amount of resources dedicated to research on IT as well as in the share of employment in the sector. A simple model is provided to explain these facts. EPL affects both labor supply and labor demand in the same way resulting in lower employment equilibrium levels.

The evidence on U.S. investment in high-tech equipment and labor productivity in the 1990s is briefly reviewed and some implications discussed. First, capturing the role of information technologies has raised a number of important measurement issues, which have led to a change in the construction of aggregate real series in the U.S. national accounts, such as real GDP. Second, the recent period provided an important confirmation for traditional neoclassical theories of business investment and productivity. Third, there is a discussion of what type of theoretical and empirical models of economic growth are likely to prove helpful in the future.