This paper develops a quality-ladder model of endogenous growth to study the interplay between in-house R&D and marketing expenditure. Although promotional activity is modelled as purely wasteful competition among firms for attention, it unambiguously fosters innovation activity of firms, and...

Empirical evidence suggests that positive externalities from R&D exceed negative ones. According to conventional wisdom, this calls for R&D subsidies. This paper develops a quality-ladder growth model with overlapping generations which evaluates the positive and normative implications of R&D...

A positiv relationship between firm size and product diversification is a long-standing stylized fact. However, so far there is no appropriate theoretical model to explain the underlying forces of this oberservation. This paper analyzes an oligopoly model with asymmetric multiproduct firms,...

R&D-based growth theory suggests that a larger population size raises either the long-run rate of economic growth ("strong scale effect") or the level of per capita income ("weak scale effect"), with far-reaching policy implications. However, for modern times there is little empirical support...

Empirical evidence suggests that positive externalities from R&D exceed negative ones. According to conventional wisdom, this calls for R&D subsidies. This paper develops a quality-ladder growth model with overlapping generations which evaluates the positive and normative implications of R&D...

We investigate the effects of interregional labor market integration in a two-sector, overlapping-generations model with land-intensive production in the non-tradable goods sector (housing). To capture the response to migration on housing supply, capital formation is endogenous, assuming that...

We investigate the effects of interregional labor market integration in a two-sector, overlapping-generations model with land-intensive production in the non-tradable goods sector (housing). To capture the response to migration on housing supply, capital formation is endogenous, assuming that...

Begriffe wie Staatsbankrott, spekulative Attacke und Gefährdung des Euro werden im Zusammenhang mit den offensichtlichen Schuldenproblemen einiger Euroländer genannt. Sie sind aber ungenau. Für eine Analyse möglicher Wirkungen des EU/IWF-Rettungsschirms und dessen aktuell diskutierter...

This paper shows that dynamic inefficiency can occur in dynamic general equilibrium models with fully optimizing, infinitely-lived households even in a situation with underinvestment. We identify necessary conditions for such a pos- sibility and illustrate it in a standard R\&D-based growth...

This paper develops a two-sector R&D-based growth model with congestion effects from increasing urban population density. We show that endogenous technologicalprogress causes structural change if there are positive productivity spillovers from the modern to the traditional sector and Engel’s...