Book reviews

Ohne Zusammenfassung     

Why cities should not be subsidized

The paper deals with the question of whether fiscal transfers received by cities can be justified by a higher cost of producing publicly provided goods. In the model, increasing the population density implies both a higher output per capita due to agglomeration economies and a higher cost of the publicly provided good due to congestion. It is shown that introducing fiscal transfers to be paid by the region with the lower population density will generally reduce welfare. This result is obtained since the city is already beyond the level of optimum agglomeration.     

A sustainable state for urban life in poor societies: Bangladesh

Cities in the Third World do not currently have favourable prospects for the future. Their planning is dedicated primarily to coping with pressures of population and infrastructure needs. Any pale imitation of advanced urbanization that they might employ as minimum standards require many times more consumption of energy, water and human time than is available. The concept of a sustainable state for the long term seems unattainable to their policy makers. This exercise seeks a path to a desirable steady state for one of the world's poorest metropolises—Dhaka. This article shows that the essential knowledge, and some experience, already exist which make this transition to sustainability possible, and outlines the crucial features required. Promotion of family planning is assigned the highest priority during the transition, followed by education.     

Long-Term Care Insurance and Life Insurance Demand

This article investigates the interaction between life insurance and long-term care insurance markets on the demand side. In the model utility depends on both consumption and bequest, and utility from consumption is contingent on the state of health. While the demand for life insurance increases both with decreasing income and with a rising degree of altruism, the influences of these two parameters on the demand for long-term care insurance are ambiguous. If the utility shock arising from disability declines, both insurance demands will rise.     

Energy and habitat: Designing a sustainable urban ecosystem

As the world's cities grow so new ways of satisfying their demands for food and fuel resources will have to be found, especially in the third world where total fuel demands are expected to expand several fold in one generation. An ecological model for a future complex urban community is presented to illustrate the place of energy in a growing system and how habitat—the physical component—possesses life cycles interdependent with living species. Recycling, biomass fuels, telecommunications, marine living and the propagation of viable organizations are all elements that will enable the globe to sustain future expanding metropolises.     

Preservation: Planning for the survival of things

Preservation—the immortalisation of living and designed things—is a channel for transmitting messages from the past to the future. Image is all important for conveying the meaning. To be preserved, a thing must have a constituency of supporters and a long-lived institution to serve as trustee: when appreciators of the message are no longer recruited, extinction is at hand. Community ecology, if extended to images, suggests some appropriate preservation policies for societies approaching steady state, eg adding to the total stock of biomass, to diversity, and to useful knowledge, while promoting new organised relationships between man and environment.     

Efficient Transfer of Aging Provisions in Private Health Insurance

In German-style private health insurance contracts, aging provisions are used to flatten premium profiles. An individual would like to change insurer if she perceives a low service quality. The first-best optimum is characterized by provision transfers upon insurer changes which are higher for high risks and may be negative for low risks. Should the actual risk status not be verifiable, provision transfers have to be uniform. Efficient transfers will equalize consumption across periods and states if high risks are deterred from switching. Otherwise, the optimum transfer balances the distortion of incentives for high-risk and low-risk individuals.