Income Satisfaction and Relative Deprivation: An Empirical Link

This paper explores the relationship between two well-established concepts of measuring individual well-being: the concept of happiness, i.e. self-reported level of satisfaction with income, and relative deprivation, i.e. the gaps between the individual’s income and the incomes of all individuals richer than him. Operationalizing both concepts using micro panel data from the German Socio-Economic Panel, we provide empirical evidence for subjective well-being depending more on relative deprivation than on absolute levels of income. This finding holds after controlling for other influential factors in a multivariate setting.      

Consistency of the least-squares-estimators for linear stochastic difference equations

Assumptions are given for the strong consistency in the stable case and weak consistency in the instable case of the Least-Square-Estimator of the unknown system-parameters of a inhomogeneous linear stochastic difference equation system with constant coefficients.     

Optimal designs for the Michaelis–Menten model with correlated observations

In this paper we investigate the problem of designing experiments for generalized least-squares analysis in the Michaelis–Menten model. We study the structure of exact D-optimal designs in a model with an autoregressive error structure. Explicit results for locally D-optimal designs are derived for the case where two observations can be taken per subject. Additionally standardized maximin D-optimal designs are obtained in this case. The results illustrate the enormous difficulties to find exact optimal designs explicitly for nonlinear regression models with correlated observations.     

Leadership and Effectiveness in the Context of Gender: The Role of Leaders' Verbal Behaviour*

This field study focuses on verbal consideration, which is a leadership behaviour that expresses esteem for the follower and her or his work, knowledge and opinion. It was assumed that the relationship between verbal consideration and various outcomes is moderated by the leader's gender. One‐hundred‐and‐forty leaders and 455 of their direct followers were surveyed in a one‐wave questionnaire study in Germany. Male and female leaders showed the same degree of verbal consideration as rated by their followers. Verbal consideration is related to three out of four outcome variables for both sexes. One unexpected moderating effect of leaders' gender was found: followers of male leaders displaying verbal consideration report less ‘irritation’ (a state of exhaustion considered a threat to good task fulfilment). One explanation may be that male leaders get ‘extra credit’ for showing verbal consideration as it may be thought to entail special effort, whereas for female leaders it may be seen as normal and routine. This assumption should be examined in further studies in order to get more information about the different mechanisms by which female and male leaders reach the same quality of outcomes.     

TO “VAPE” OR SMOKE? EXPERIMENTAL EVIDENCE ON ADULT SMOKERS

A growing share of the U.S. population uses e‐cigarettes but the optimal regulation of these controversial products remains an open question. We conduct a discrete choice experiment to investigate how adult tobacco cigarette smokers' demand for e‐cigarettes and tobacco cigarettes varies by four attributes: (1) whether e‐cigarettes are considered healthier than tobacco cigarettes, (2) the effectiveness of e‐cigarettes as a cessation device, (3) bans on use in public places, and (4) price. We find that adult smokers' demand for e‐cigarettes is motivated more by health concerns than by the desire to avoid smoking bans or higher prices. (JEL C35, I12, I18)     

NGOs,IOs, and the ICC: Diagnosing and Framing Darfur

Nongovernmental organizations (NGOs) have become influential forces in global society. They exert their influence in part by framing issues and thereby suggesting particular courses of action. This article examines how NGOs with distinct missions represent mass violence for the case of Darfur. Content analysis of reports, speeches, and other documents from Amnesty International, Doctors Without Borders, and Save Darfur reveals distinct patterns across organizations. In addition to the organizations' specialized fields, interventions by external actors such as the United Nations and the International Criminal Court affect NGO framing, but they do so in organization‐specific ways. Against presumptions of a uniform Western position on Darfur, this analysis documents that depictions of violence by Western NGOs show field‐specific patterns and distinct responses to international political and judicial interventions.     

Putting the P-Value in its Place

ABSTRACT

As the debate over best statistical practices continues in academic journals, conferences, and the blogosphere, working researchers (e.g., psychologists) need to figure out how much time and effort to invest in attending to experts' arguments, how to design their next project, and how to craft a sustainable long-term strategy for data analysis and inference. The present special issue of The American Statistician promises help. In this article, we offer a modest proposal for a continued and informed use of the conventional p-value without the pitfalls of statistical rituals. Other statistical indices should complement reporting, and extra-statistical (e.g., theoretical) judgments ought to be made with care and clarity.     

On a conjecture concerning the least favorable configuration of certain two-stage selection procedures

Given k normal populations with unknown means and a common known variance a two-stage procedure p₁ with screening in the first stage to find the population with the largest mean using the indifference-zone approach is under concern. It was proposed and studied previously by Cohen (1959), Alam (1970) and Tamhane and Bechhofer (1977, 1979). But up to now a conjecture concerning the least favorable parameter configuration of p₁remained unproved for k ≥ 3. In this paper we give a non-standard proof of the conjecture in case of k = 3 for p₁. which (under minor changes) works also for a simplified version of p₁,. Besides, a counterexample is provided to show that another (more intuitive) method of proof fails to work.     

The maximum flow problem with disjunctive constraints

We study the maximum flow problem subject to binary disjunctive constraints in a directed graph: A negative disjunctive constraint states that a certain pair of arcs in a digraph cannot be simultaneously used for sending flow in a feasible solution. In contrast to this, positive disjunctive constraints force that for certain pairs of arcs at least one arc has to carry flow in a feasible solution. It is convenient to represent the negative disjunctive constraints in terms of a so-called conflict graph whose vertices correspond to the arcs of the underlying graph, and whose edges encode the constraints. Analogously we represent the positive disjunctive constraints by a so-called forcing graph. For conflict graphs we prove that the maximum flow problem is strongly $\mathcal{NP}$ -hard, even if the conflict graph consists only of unconnected edges. This result still holds if the network consists only of disjoint paths of length three. For forcing graphs we also provide a sharp line between polynomially solvable and strongly $\mathcal{NP}$ -hard instances for the case where the flow values are required to be integral. Moreover, our hardness results imply that no polynomial time approximation algorithm can exist for both problems. In contrast to this we show that the maximum flow problem with a forcing graph can be solved efficiently if fractional flow values are allowed.