We test a q investment model for Belgium using a multivariate cointegration approach. The introduction of the degree of capacity utilization duc, in addition to investment and average q, is necessary to determine the cointegration space. This supports the idea that marginal q differs from...

We consider an overlapping generations model with uncertain lifetime and endogenous growth. Individuals have to choose the length of time devoted to schooling before starting to work. We show that it depends positively on life expectancy but that the positive effect of a longer life on growth...

In a general equilibrium framework, this paper tries to reproduce an important stylized fact of real economies : firms set prices under demand uncertainty while consumption decisions are taken when prices are already known. Under these conditions, there is place for a quantity rationing...

This paper analyzes the equilibrium dynamics of an AK-type endogenous growth model with vintage capital. The inclusion of vintage capital leads to oscillatory dynamics governed by replacement echoes, which additionally influence the intercept of the balanced growth path. These features, which...

In a competitive overlapping generation model, underutilization of labor and equipment can be due to the combinaison of irreversibility of human capital, physical capital and technology with idiosyncratic productivity shocks. Irreversibilities and uncertainty generate an inefficient allocation...

In an unionized OLG model, it is shown that steady-state underutilization of labour and equipment can be due to the combinaison of the following elements : (i) Irreversibility of capital, technology and skill decision, (ii) Firm specific shocks on productivity. The presence of unions is neither...

In this paper we have analyzed existence, uniqueness and stability of a steady-state equilibrium in an overlapping generations model with monopolistic competition and free entry and exit of firms. We establish a strenghtened Inada condition that is sufficient to exclude global contraction for...

In this paper, we present a simple vintage capital growth model in which both exogenous and endogenous fluctuations sources are present. Indeed, it can be seen as a particular case of Caballero and Hammour (1996)'s creative destruction model, with advantage that analytical characterization of...

In this paper, we build up a general equilibrium model explicitly incorporating Schumpeterian growth à la Aghion and Howitt (1992) and a vintage capital structure in line with Solow (1960). In this set-up, we show that the investment rate is a fundamental determinant of the profitability of...

In order to assess the importance of embodiment, we build up an endogenous growth model in which learning by doing is the engine of both embodied and disembodied technological progress. In sharp contrast to Phelps (1962), we show that a change in the composition of technical change affects the...