Population aging and endogenous economic growth

This article investigates the consequences of population aging for long-run economic growth perspectives. We introduce age specific heterogeneity of households into a model of research and development (R&D) based technological change. We show that the framework incorporates two standard specifications as special cases: endogenous growth models with scale eects and semi-endogenous growth models without scale effects. The introduction of an age structured population implies that aggregate laws of motion for capital and consumption have to be obtained by integrating over different cohorts. It is analytically shown that these laws of motion depend on the underlying demographic assumptions. Our results are that (i) increases in longevity have positive effects on per capita output growth, (ii) decreases in fertility have negative effects on per capita output growth, (iii) the longevity effect dominates the fertility eect in case of endogenous growth models and (iv) population aging fosters long-run growth in endogenous growth models, while the converse holds true in semiendogenous growth frameworks.population aging, endogenous technological change, longrun economic growth

Population ageing and endogenous economic growth

This article investigates the consequences of population ageing for longrun economic growth perspectives. We introduce population ageing into a generalized model of endogenous technological change incorporating the model of Romer (1990) and Jones (1995) as special cases. We find that increases in longevity have positive effects on steady state per capita output growth in endogenous as well as in semiendogenous growth models. In the latter case, the positive dependence can also be shown for the equilibrium growth rate during transition to the steady state.population ageing, endogenous technological change, long-run economic growth.

Increasing life expectancy and optimal retirement:does population aging necessarily undermine economic prosperity?

In this paper we analyze the eects of changes in longevity and the pace of technological progress on interest rates, savings behaviour and optimal retirement decisions. In so doing we embed the dynamic optimization problem of choosing a life-cycle consumption path and the retirement age into a general equilibrium setting. Thereby we assume that technology evolves exogenously and the production side of the economy can be described by means of a neoclassical production function. Our results show that (i) the aggregate capital to consumption ratio increases and interest rates decrease in response to increases in longevity; (ii) the response of the optimal retirement age to increases in longevity is ambiguous. However, for reasonable parameter values the optimal retirement age increases in longevity; (iii) the aggregate capital to consumption ratio decreases and interest rates increase in response to faster technological progress; (iv) the response of the optimal retirement age to faster technological progress is ambiguous. However, for reasonable parameter values the optimal retirement age increases in the pace of technological improvements.endogenous retirement, life-cycle savings, population aging, technological progress, economic prosperity

Demographic Change in Models of Endogenous Economic Growth. A Survey.

The purpose of this article is to identify the role of population size, population growth and population ageing in models of endogenous economic growth. While in exogenous growth models demographic variables are linked to economic prosperity mainly via the population size, the structure of the workforce, and the capital intensity of workers, endogenous growth models and their successors also allow for interrelationships between demography and technological change. However, most of the existing literature considers only the interrelationships based on population size and its growth rate and does not explicitly account for population ageing. The aim of this paper is (a) to review the role of population size and population growth in the most commonly used economic growth models (with a focus on endogenous economic growth models), (b) discuss models that also allow for population ageing, and (c) sketch out the policy implications of the most commonly used endogenous growth models and compare them to each other.Demographic change, endogenous R&D, economic growth

Agglomeration and population ageing in a two region model of exogenous growth

This article investigates the effects of introducing demography into the New Economic Geography. We generalize the constructed capital approach, which relies on infinite individual planning horizons, by introducing mortality. The resulting overlapping generation framework with heterogeneous individuals allows us to study the effects of ageing on agglomeration processes by analytically identifying the level of trade costs that triggers catastrophic agglomeration. Interestingly, this threshold value is rather sensitive to changes in mortality. In particular, the introduction of a positive mortality rate makes the symmetric equilibrium more stable and therefore counteracts agglomeration tendencies. In sharp contrast to other New Economic Geography approaches, this implies that deeper integration is not necessarily associated with higher interregional inequality.Agglomeration, New Economic Geography, Trade and Growth, Constructed Capital Model, Population Ageing.

The Dynamic Interrelations between Unequal Neighbors: An Austro-German Case Study

This article investigates the effects and transmission channels of shocks between two asymmetric neighboring countries. In particular, we investigate Austria and Germany which are highly integrated due to their common language and common membership of the European Monetary Union. Generalized impulse response functions reveal that there are large and significant effects of shocks to the German economy on Austria. In contrast, the effects of shocks to the Austrian economy on Germany are barely significant and if they are, their magnitude is comparatively small. Furthermore we can show that multiplier effects are present in Germany but not in Austria and we identify hysteretic properties in Austrian unemployment.

R&D-based Growth in the Post-modern Era

Conventional R&D-based growth theory suggests that productivity growth is positively correlated with population size or population growth, an implication which is hard to see in the data. Here we integrate R&D-based growth into a unified growth setup with micro-founded fertility and schooling behavior. We then show how a Beckerian child quality-quantity trade-off explains why higher growth of productivity and income per capita are associated with lower population growth. The medium-run prospects for future economic growth - when fertility is going to be below replacement level in virtually all developed countries - are thus much better than predicted by conventional R&D-based growth theory.R&D, unified growth theory, declining population, fertility, schooling, human capital, post-modern society.

The implications of automation for economic growth and the labor share

We introduce automation into a standard model of capital accumulation and show that (i) there is the possibility of perpetual growth, even in the absence of technological progress; (ii) the long-run economic growth rate declines with population growth, which is consistent with the available empirical evidence; (iii)there is a unique share of savings diverted to automation that maximizes long-run growth; (iv) the labor share declines with automation to an extent that fits to the observed pattern over the last decades

R&D-Based Growth in the Post-Modern Era.

Conventional R&D-based growth theory suggests that productivity growth is positively correlated with population size or population growth, an implication which is hard to see in the data. Here we integrate micro-founded fertility and schooling into an otherwise standard R&D-based growth model. We then show how a Beckerian child quality-quantity trade-off explains why higher growth of productivity and income per capita are associated with lower population growth. The medium-run prospects for future economic growth - when fertility is going to be below replacement level in virtually all fully developed countries - are thus much better than predicted by conventional R&D-based growth theory..Endogenous growth, R&D, declining population, fertility, schooling, human capital, postmodern society, post-transitional fertility.

A Note on Automation, Stagnation, and the Implications of a Robot Tax

We analyze the long-run growth effects of automation in the canonical overlapping generations framework. While automation implies constant returns to capital within this model class (even in the absence of technological progress), we show that it does not have the potential to lead to positive long-growth. The reason is that automation suppresses wages, which are the only source of investment because of the demographic structure of the overlapping generations model. This result stands in sharp contrast to the effects of automation in the representative agent setting, where positive long-run growth is feasible because agents can invest out of their wage income and out of their asset income. We also analyze the effects of a robot tax that has featured prominently in the policy debate on automation and show that it could raise the capital stock and per capita output at the steady state. However, the robot tax cannot induce a takeoff toward positive long-run growth