Publications des institutions partenaires
Retirement of spouses and social security reform
The retirement decisions of spouses may be interdependent for various reasons: similarity of tastes, joint assets, sharing rules for income and housework, or complementarity of leisure. Because of data limitations, only a few empirical studies exist on this topic. From a policy point of view interdependent retirement could become important if legislators in different EC countries are...
Institution partenaire
English / 01/01/1996
The cross-country Engel curve for product diversification
This paper employs ICP expenditure data to investigate the relationship between income and product diversity. It turns out that per-capita income has a strong positive impact on the number of products consumed at a non-negligible level in a country, and a significant negative impact on the concentration of consumers' expenditure across different goods categories. Inequality in...
Institution partenaire
English / 01/01/1996
Tax evasion, consumption of public goods and fairness
This study shows that in general the impact of equity on tax evasion depends on how the taxpayer's risk aversion is affected by perceived equity. Then possible reasons are discussed why an increase in perceived equity may increase a person's risk aversion and thus lead to a decrease of evasion. An economic as well as a psychological argument are presented which can explain...
Institution partenaire
English / 01/03/1995
Energy security Coping with multiple supply risks
This study starts from the observation that today's Western trading nations are exposed to multiple risks of energy supplies, eg simultaneous shortage of oil and gas supplies. To cope with these risks, both oil and gas can be stockpiled. Adopting the viewpoint of a policy maker who aims at minimizing the expected cost of security of supply, optimal simultaneous adjustments of...
Institution partenaire
English / 01/01/1995
Diffusion of hospital innovations in different institutional settings
This paper purports to analyze a hospital's adoption of both product and process innovation as a quantal choice. The impacts of this decision on physicians, while depending on institutions that differ between the US and continental Europe, are shown to feed back to the hospital, influencing the profitability of the innovation. Recent changes of hospital finance give rise to...
Institution partenaire
English / 01/01/1995
Collective action, migration and welfare states
In current welfare state analysis there is little theory to explain the action of exclusive groups. This article explores the possibilities of a theory that focuses on the interaction between individual choices and strategies, the formal systems, policies and rules of governments and the informal norms and practices of groups. The argument is that club theory, a branch of public...
Institution partenaire
English / 01/01/1995
Happiness and unemployment: a panel data analysis for Germany
We use data from the German Socio-Economic Panel to investigate how individual happiness is affected by unemployment. Unemployment has a large and negative effect even after controlling for individual specific fixed effects. Nonparticipation, in contrast, is much less harmful to happiness. Further, we decompose the total well-being costs of unemployment and find that well above three...
Institution partenaire
English / 01/01/1995
Duration dependence and dispersion in count - data models
This paper explores the relation between non-exponential waiting times between events and the distribution of the number of events in a fixed time interval. It is shown that within this framework the frequently observed phenomenon of overdispersion, i.e. a variance that exceeds the mean, is caused by a decreasing hazard function of the waiting times, while an increasing hazard...
Institution partenaire
English / 01/01/1995
Product and process flexibility in an innovative environment
This article studies several attributes of a firm's long-run decisions about organizational structure, attributes that affect the firm's short-run innovative activity. We focus on flexibility, which lowers the future costs of implementing innovations, and research capabilities, which improve the future opportunities for innovation. We consider two dimensions of innovation:...
Institution partenaire
English / 01/01/1995
On the effects of price or quality. Regulations in a Monopoly market
Institution partenaire
English / 01/01/1995
An Engelian model of growth and innovation with hierarchic consumer demand and unequal incomes
The paper develops an endogenous growth model which is based on lexicographical consumer preferences. The central variable determining the long-run rate of growth is personal income distribution. Its role in the process of growth depends crucially on the assumption about productivity growth. If productivity grows proportionally to product diversity, then an unequal distribution of...
Institution partenaire
English / 01/06/1994
Count data models for demographic data.
Key demographic variables, such as the number of children and the number of marriages or divorces, can only take integer values. This papers deals with the estimation of single equation models in which the counts are regressed on a set of observed individual characteristics such as age, gender, or nationality. Most empirical work in population economics has neglected the fact that...
Institution partenaire
English / 01/02/1994
The private provision of public goods when the relative size of contributions matters
Institution partenaire
English / 01/01/1994
Two aspects of labor mobility: a bivariate Poisson regression approach
The study introduces a distinction between two types of labor mobility: direct job to job changes (which are assumed to be voluntary) and job changes after experiencing an unemployment spell (assumed to be involuntary). Exploiting the close relationship between those two phenomena we adopt a bivariate regression framework for our empirical analysis of data on male individuals in the...
Institution partenaire
English / 01/01/1993
The impact of quality and reliability on demand
Institution partenaire
English / 01/01/1993
Die Wahrscheinlichkeit paradoxer Abstimmungsergebnisse
Abstimmungen als Mittel zur Entscheidungsfindung sind heute sehr verbreitet. Dass Abstimmungsergebnisse (aus logisch zwingenden Gründen) nicht in jedem Fall rational sein müssen, ist hingegen wenig bekannt. Die vorliegende Arbeit zeigt an Hand theoretischer Berechnungen und praktischer Fallbeispiele aus der schweizerischen Politik, dass irrationale, sogenannt paradoxe Entscheide...
Institution partenaire
Deutsch / 01/01/1993
Towards a quality-centered economic analysis: Some simple diagrams
Institution partenaire
English / 01/12/1992
Homo Oeconomicus Sapiens. Versuche zu einer "modernen" Volkswirtschaftslehre
Institution partenaire
Deutsch / 01/01/1992
On optimal public good provision with tax evasion
It is proved that for public goods with zero income effects (also called Ziff public goods) tax evasion does not affect the optimal level of public expenditure. Further examples show that, in general, tax evasion may lead to less but also to more public expenditure.
Institution partenaire
English / 01/06/1991
A new approach for modeling economic count data
A new parametric model for the econometric analysis of non-negative integers is proposed. Its distinguishing feature is that it allows for more flexible variance-mean relationships than the models used hitherto. Estimation with maximum likelihood is illustrated using a dataset on ship damage incidents.
Institution partenaire
English / 01/01/1991
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