Efficient experimental designs for sigmoidal growth models

For the Weibull- and Richards-regression model robust designs are determined by maximizing a minimum of D  - or _D1$D_1$-efficiencies, taken over a certain range of the non-linear parameters. It is demonstrated that the derived designs yield a satisfactory solution of the optimal design problem for this type of model in the sense that these designs are efficient and robust with respect to misspecification of the unknown parameters. Moreover, the designs can also be used for testing the postulated form of the regression model against a simplified sub-model.     

Robustness properties of minimally‐supported Bayesian D‐optimal designs for heteroscedastic models

Bayesian D‐optimal designs supported on a fixed number of points were found by Dette & Wong (1998) for estimating parameters in a polynomial model when the error variance depends exponentially on the explanatory variable. The present authors provide optimal designs under a broader class of error variance structures and investigate the robustness properties of these designs to model and prior distribution assumptions. A comparison of the performance of the optimal designs relative to the popular uniform designs is also given. The authors' results suggest that Bayesian D‐optimal designs suported on a fixed number of points are more likely to be globaly optimal among all designs if the prior distribution is symmetric and is concentrated around its mean.     

Interjurisdictional Sorting and Majority Rule: An Empirical Analysis

The goal of this paper is to provide a comprehensive empirical analysis of majority rule and Tiebout sorting within a system of local jurisdictions. The idea behind the estimation procedure is to investigate whether observed levels of public expenditures satisfy necessary conditions implied by majority rule in a general equilibrium model of residential choice. The estimator controls for observed and unobserved heterogeneity among households, observed and unobserved characteristics of communities, and the potential endogeneity of prices and expenditures, as well as the self‐selection of households into communities of their choice. We estimate the structural parameters of the model using data from the Boston Metropolitan Area. The empirical findings reject myopic voting models. More sophisticated voting models based on utility‐taking provide a potential explanation of the main empirical regularities.     

How We Fall Apart: Similarities of Human Aging in 10 European Countries

We analyze human aging—understood as health deficit accumulation—for a panel of European individuals, using four waves of the Survey of Health, Aging and Retirement in Europe (SHARE data set) and constructing a health deficit index. Results from log-linear regressions suggest that, on average, elderly European men and women develop approximately 2.5 % more health deficits from one birthday to the next. In nonlinear regressions (akin to the Gompertz-Makeham model), however, we find much greater rates of aging and large differences between men and women as well as between countries. Interestingly, these differences follow a particular regularity (akin to the compensation effect of mortality) and suggest an age at which average health deficits converge for men and women and across countries. This age, which may be associated with human life span, is estimated as 102 ± 2.6 years.     

Immigration and Natives’ Attitudes towards the Welfare State: Evidence from the European Social Survey

Does immigration reduce natives’ support for the welfare state? Evidence from the European Social Survey (2002/2003) suggests a more qualified relation. For Europe as a whole, there is only weak evidence of a negative association between the perceived presence of immigrants and natives’ support for the welfare state. However, this weak average relationship masks considerable heterogeneity across countries. We distinguish two channels through which immigration could affect natives’ support for the welfare state: a pure dislike of immigrants and concerns about the economic consequences of immigration. We find that natives who hold both negative views react much more negatively to a given perceived share of immigrants than natives who hold neither view. However, there is no clear pattern concerning the relative importance of the two channels. Finally, we find that natives who hold either of these negative views of immigrants tend to be less supportive of the welfare state independently of the perceived presence of immigrants.     

PROCEDURAL UNFAIR WAGE DIFFERENTIALS AND THEIR EFFECTS ON UNETHICAL BEHAVIOR

In this paper, we investigate how payment procedures that are deemed unfair can spur unethical behavior towards innocent coworkers in a real-effort experiment. In our Discrimination treatment, a highly unfair payment procedure with wage differentials, half the workforce is randomly selected and paid by relative performance whereas the remaining receives no payment. A joy-of-destruction game measures unethical behavior subsequently. Non-earners in Discrimination destroy significantly more than in the non-discriminatory control treatments. In Discrimination, unethical behavior is generally high for all non-earners, independent of individual inequality aversion and relative performance beliefs. In the control treatments, inequality aversion is the main driver of destructive behavior. (JEL C91, D03, J33, J70, M52)     

Relative Performancebewertung und Produktmarktwettbewerb

Relative Performance Evaluation aims at reducing incentive risk imposed on a manager, and at influencing product market choices. Thereby, firm owners can choose stronger effort incentives, and they may reduce the degree of competition with the firm’s competitors. Within a principal/agent-model, we explore the interrelation between characteristics of product market competition, performance evaluation, and incentives. Our results show that a firm’s optimal performance evaluation significantly depends on the characteristics of product market competition. This implies that a firm’s optimal choice of performance evaluation is firm- and industry-specific. Hence, our results support the industry-selection-approach recently applied in empirical compensation studies.     

SECULARIZATION AND LONG‐RUN ECONOMIC GROWTH

This paper integrates a simple theory of identity choice into a framework of endogenous economic growth to explain how secularization can be both cause and consequence of economic development. A secular identity allows an individual to derive more pleasure from consumption than religious individuals, leading secular individuals to work harder and to save more in order to experience this pleasure from consumption. These activities are conducive to economic growth. Higher income makes consumption more affordable and increases the appeal of a secular identity for the next generation. An extension of the basic model investigates the Protestant Reformation as an intermediate stage during the take‐off to growth. Another extension introduces intergenerationally dependent religious preferences and demonstrates how a social multiplier amplifies the speed of secularization. (JEL N30, O10, O40, Z12, Z13)     

Bayesian and maximin optimal designs for heteroscedastic regression models

The authors consider the problem of constructing standardized maximin D‐optimal designs for weighted polynomial regression models. In particular they show that by following the approach to the construction of maximin designs introduced recently by Dette, Haines & Imhof (2003), such designs can be obtained as weak limits of the corresponding Bayesian _q‐optimal designs. They further demonstrate that the results are more broadly applicable to certain families of nonlinear models. The authors examine two specific weighted polynomial models in some detail and illustrate their results by means of a weighted quadratic regression model and the Bleasdale–Nelder model. They also present a capstone example involving a generalized exponential growth model.     

Critical Incident Stress Management und Personzentrierte Krisenintervention

The Critical Incident Stress Management (CISM) by Mitchell und Everly (2001) is used to obviate the development of Post Traumatic Stress Disorder (PTSD) of action forces and other affected people after disasters. The Person-centred Crisis Intervention by Kunze und de Brito Santos Dodt (2005) is a system based on Rogers?? Person-centred Psychotherapy, which is realized after individual crises experienced incidents and changes. On the one hand, the CISM has been criticised because it emanates from the traumatic event and implicates only the PTSD and that the CISD is a procedure-centred setting, which involves the danger of triggering. On the other hand, the person-centred crisis intervention has been approved because it classifies crises to be manageable, trusts the individuals to manage the crisis and aims the person itself.