Pension reform, capital markets, and the rate of return

This paper discusses the consequences of population aging and a fundamental pension reform – that is, a shift towards more pre-funding – for capital markets in Germany. We use a stylized closed-economy, overlapping-generations model to compare the effects of the recent German pension reform with those of a more decisive reform that would freeze the current pay-as-you-go contribution rate and thus result in a larger funded component of the pension system. We predict rates of return to capital under both reform scenarios over a long horizon, taking demographic projections as given. Our main finding is that the future decrease in the rate of return is much smaller than often claimed in the public debate. Our simulations show that the capital stock will decrease once the baby boom generations enter retirement even if there were no fundamental pension reform. The corresponding decrease in the rate of return, the direct effect of population aging, is around 0.7 percentage points. While the capital market effects of the recent German pension reform are marginal, the rate of return to capital would decrease by an additional 0.5 percentage points under the more decisive reform proposal.

Aging and International Capital Flows

Throughout the world, population aging is a major challenge that will continue well into the 21st century. While the patterns of the demographic transition are similar in most countries, timing differs substantially, in particular between industrialized and less developed countries. To the extent that capital is internationally mobile, population aging will therefore induce capital flows between countries. In order to quantify these international capital flows, we employ a multi-country overlapping generations model and combine it with long-term demographic projections for several world regions over a 50 year horizon. Our simulations suggest that capital flows from fast-aging industrial countries (such as Germany and Italy) to the rest of the world will be substantial. Closed-economy models of pension reform are likely to miss quantitatively important effects of international capital mobility.

Aging, Pension Reform, and Capital Flows:

We present a quantitative analysis of the effects of population aging and pension reform on international capital markets. First, demographic change alters the time path of aggregate savings within each country. Second, this process may be amplified when a pension reform shifts old-age provision towards more pre-funding. Third, while the patterns of population aging are similar in most countries, timing and initial conditions differ substantially. Hence, to the extent that capital is internationally mobile, population aging will induce capital flows between countries. All three effects influence the rate of return to capital and interact with the demand for capital in production and with labor supply. In order to quantify these effects, we develop a computational general equilibrium model. We feed this multi-country overlapping generations model with detailed long-term demographic projections for seven world regions. Our simulations indicate that capital flows from fast-aging regions to the rest of the world will initially be substantial but that trends are reversed when households decumulate savings. We also conclude that closed-economy models of pension reform miss quantitatively important effects of international capital mobility.25 August, 2004

Aging, pension reform, and capital flows: A multi-country simulation model

In this paper, we present a quantitative analysis of the international capital flows induced by differences in population aging processes across countries and by pension reforms. In the vast majority of countries, demographic change will continue well into the 21st century. It is well known that within each country, demographic change alters the time path of aggregate savings, even more so in countries where fundamental pension reforms and shifts towards more pre-funding are implemented. While the patterns of population aging are similar in most countries, the timing differs substantially, in particular between industrialized and less developed countries. To the extent that capital is internationally mobile, population aging will therefore induce capital flows between countries. In order to quantify these effects, we develop a stylized multi-country overlapping generations model, and we use long-term demographic projections for several world regions to simulate international capital flows over a 50 year horizon. Our simulations suggest that capital flows from fast-aging industrial countries such as Germany to the rest of the world will be substantial. Closed-economy models of pen-sion reform are likely to miss quantitatively important effects of international capital mobility.

Aging and International Capital Flows

Throughout the world, population aging is a major challenge that will continue well into the 21st century. While the patterns of the demographic transition are similar in most countries, timing differs substantially, in particular between industrialized and less developed countries. To the extent that capital is internationally mobile, population aging will therefore induce capital flows between countries. In order to quantify these international capital flows, we employ a multi-country overlapping generations model and combine it with long-term demographic projections for several world regions over a 50 year horizon. Our simulations suggest that capital flows from fast-aging industrial countries (such as Germany and Italy) to the rest of the world will be substantial. Closed-economy models of pension reform are likely to miss quantitatively important effects of international capital mobility.

A Cognitive Perspective on Spatial Context

This paper develops a representation-theoretic notion of spatial context for cognitive agents interacting with spatial environments. We discuss the current state of the art in defining context as used in context-aware and/or location- aware systems. In contrast to existing approaches, we define context through cognitive processes. The term "invisible geography" alludes to the fact that knowledge about geographic space develops through complex cognitive interaction and is not simply "out there" to be looked at. Placing (cognitive) processes in the focus of our context definition allows for a truly user-centered perspective: conceptualizations imbue spatial structures with meaning. This allows for fixing terminological problems and relating context definitions to work in spatial information theory and cognitive science. Although we focus on spatial context, the approach is generic and can be adapted to other domains in which cognitive aspects concerning users of information systems are central