Klaus Prettner

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We investigate the effects of job-specific knowledge for individual labor earnings of workers in the German economy. The results indicate a positive effect for earnings stemming in particular from high-knowledge in the areas of sales and marketing, computers and electronics, mathematics, biology and law and government. Investigating the geographical(More)
The individual Euler equation: The current value Hamiltonian is H = log(c) + γ log(β) + λ [(r + µ − δ)k + ˆ w − (1 + ψβ)c]. The first order conditions are 1 c = λ(1 + ψβ) (A.1) γ β = λψc (A.2) ˙ λ = (ρ + δ − r)λ. (A.3) From equation (A.2) the birth rate follows as β = γ (1 − γ)ψ. (A.4) Taking the time derivative of equation (A.1) and plugging it into(More)
Conventional R&D-based growth theory argues that productivity growth is driven by population growth but the data suggest that the erstwhile positive correlation between population and productivity turned negative during the 20th century. In order to resolve this problem we integrate R&D-based innovations into a unified growth framework with micro-founded(More)
We study the effects of labor intensive health care within a research and development (R&D) driven growth model with overlapping generations. Health care increases longevity, labor participation, and productivity, while it also diverts labor away from production and R&D. We examine under which conditions expanding health care enhances growth and welfare and(More)
In recent decades, most industrialized countries experienced declining population growth rates caused by declining fertility and associated with rising life expectancy. We analyze the effect of continuing demographic change on medium-and long-run economic growth by setting forth an R&D-based growth model including an analytically tractable demographic(More)
This article investigates common economic consequences of population aging and economic integration for agglomeration processes. We introduce demography into the New Economic Geography by generalizing the constructed capital approach to account for changes in the age structure of the population. Interestingly, the level of trade costs triggering(More)
This article introduces a social planner version of a model central to the New Economic Geography for explicitly answering whether the symmetric equilibrium outcome of the decentralized market economy is socially desirable. We find that savings incentives are too weak, resulting in an inefficiently low capital stock and therefore an inadequate number of(More)
We investigate the effects of human capital accumulation on trade and productivity by integrating a micro-founded education and fertility decision of households into a model of international trade with firm heterogeneity. Our theoretical framework leads to two testable implications: i) the export share of a country increases with the education level of its(More)