The Justice of Earnings in Dual-Earner Households

The rise in female labor market participation and the growth of "atypical" employment arrangements has, over the last few decades, brought about a steadily decreasingpercentage of households in which the man is the sole breadwinner, and a rising percentage of dual-earner households. Against this backdrop, the present paper investigates the impact of household contexts in which the traditional male breadwinner model has been called into question on individuals' subjective evaluations of the equity or inequity of their personal earnings. In the first step, based on social production function theory, we derive three criteria used by individuals to evaluate the fairness or justice of their personal earnings: compensation for services rendered, coverage of basic needs, and the opportunity to earn social approval. In the second step, we apply considerations from household economics and new approaches from gender research to explain why men's and women's evaluations of justice are determined to a considerable degree by the specific situation within their household - for example, by the status and income relation between the two partners. The assumptions derived regarding gender-specific patterns in justice attitudes are then tested on data from the German Socio-Economic Panel Study (SOEP) from the year 2007. We find that, among women, the perceived justice of personal earnings depends much more strongly on the particular household context. At the same time, opportunities for social comparison within the household and the relation between the woman's personal income and that of her husband play central roles. Men's justice evaluations, in contrast, are determined to a much greater extent by whether their income allows them to conform to traditional gender norms and concepts of "masculinity", and by so doing, to gain social approval outside the household as well.

The fidelity of prototype and testing environment in usability tests

This doctoral thesis investigated what setup of a usability test can best support valid test outcomes. Several aspects of contextual fidelity were manipulated in experimental usability studies, to examine their impact on test results. The first study demonstrated that the medium of prototype presentation has effects on test outcomes, which have not been found in previous research. Using a more hypothesis-driven approach, it was shown that participants exhibited more reading activity when using a paper-based as compared to a computer prototype presented on screen. This resulted in better performance, if task success required reading a short paragraph of text. Consequently, the medium of prototype presentation needs to be considered to avoid that respective usability problems go undetected. A second study demonstrated that additional observers may cause stress for test participants, which can be measured at the physiological level. Some performance indicators were affected, but only in interaction with perceived developmental stage of the test system. A third study investigated the effects of a work or leisure context on the outcome of a usability test. No effects were found for the type of usage context, but even short response time delays proved to be relevant for performance and emotions. Relevant factors for the validity of usability test outcomes were identified and theoretical and practical implications are discussed. Keywords: Usability test; paper prototype; fidelity; observer presence; work and leisure domain; system response time; heart rate variability; validity

Multi-site scheduling with fuzzy concepts

AbstractThe objective of multi-site scheduling is to support the scheduling activities of a global scheduler and schedulers in distributed production plants in a cooperative way. A global schedule generated on a global level must be translated into detailed schedules as part of the local scheduling process. In case of disturbance, feedback between the local and global levels is essential. Global level data are normally aggregated, imprecise, or estimated. Previous methods focused on local production sites, in most cases without coordination. In this work we present an approach that considers the adequate modeling and processing of imprecise data for global level scheduling within a multi-site scheduling system based on fuzzy concepts. One of the goals is to create a robust prescription for the local scheduling systems which helps to reduce the effort of coordination and rescheduling

Methods to Manage Information Sources for Software Product Managers in the Energy Market - A Reference Model Catalog for the Energy Market

The German energy market is facing several challenges due to changes in regulation, technical advancements as well as increasing energy costs and climate achievements like CO2 reduction. This results in changing requirements for companies in the energy market and thus business information systems, which support their core tasks and processes. Software product managers in energy and software developing companies in charge of driving the functional development of information systems have to deal with these challenges and need to develop new information systems or enhance existing ones. Conceptual models proved helpful to design and implement information systems within several industries. However, identification and management of models as well as impact analysis of model changes results difficult. This contribution describes methods to construct, use and maintain a domain specific reference model catalogue to support requirements analysis for software product manager in the German electricity and gas market

A Factorial Survey on the Justice of Earnings within the SOEP-Pretest 2008

In the 2008 Socio-Economic Panel Study (SOEP) Pretest, the factorial survey method was tested for the first time for use in the SOEP longitudinal study. In this paper, we describe the construction and application of the vignette module, which has its origins in the field of justice research and is used in particular in the measurement of income justice. We show that the factorial survey method is applicable in large-scale survey research when taking certain constraints into account,and that respondents of varying ages and educational groups are able to deal sufficiently well with answering the questions. The results obtained suggest that older respondents tend to take fewer dimensions into consideration in forming their opinions. Further studies will be needed to determine whether this is evidence that the evaluation tasks were too complex for these respondents and should thus be interpreted as a method effect, or whether it represents a valid substantive result. The results of the study demonstrate convincingly that alongside occupation, education, and performance-factors relating directly to employment-familial aspects such as civil status, the partner's employment status, and number of children constitute important criteria for determining what constitutes a "fair" income. The factor survey in the 2008 SOEP Pretest offers diverse analytical potential, both from a methodological point of view and in terms of the empirical results obtained. The positive experience with the 2008 SOEP Pretest suggests that the SOEP vignette module can be used effectively in a future wave of the main SOEP survey.income, justice theory, fairness, factorial survey method, SOEP

A Factorial Survey on the Justice of Earnings within the SOEP-Pretest 2008

In the 2008 Socio-Economic Panel Study (SOEP) Pretest, the factorial survey method was tested for the first time for use in the SOEP longitudinal study. In this paper, we describe the construction and application of the vignette module, which has its origins in the field of justice research and is used in particular in the measurement of income justice. We show that the factorial survey method is applicable in large-scale survey research when taking certain constraints into account, and that respondents of varying ages and educational groups are able to deal sufficiently well with answering the questions. The results obtained suggest that older respondents tend to take fewer dimensions into consideration in forming their opinions. Further studies will be needed to determine whether this is evidence that the evaluation tasks were too complex for these respondents and should thus be interpreted as a method effect, or whether it represents a valid substantive result. The results of the study demonstrate convincingly that alongside occupation, education, and performance – factors relating directly to employment – familial aspects such as civil status, the partner's employment status, and number of children constitute important criteria for determining what constitutes a "fair" income. The factor survey in the 2008 SOEP Pretest offers diverse analytical potential, both from a methodological point of view and in terms of the empirical results obtained. The positive experience with the 2008 SOEP Pretest suggests that the SOEP vignette module can be used effectively in a future wave of the main SOEP survey.income, justice theory, fairness, factorial survey method, SOEP

Die wahrgenommene Gerechtigkeit des eigenen Einkommens: geschlechtstypische Muster und die Bedeutung des Haushaltskontextes

The rise in female labor market participation and the growth of ¿atypical¿ employment arrangements has, over the last few decades, brought about a steadily decreasing percentage of households in which the man is the sole breadwinner, and a rising percentage of dual-earner households. Against this backdrop, the present paper inves-tigates how household contexts in which the traditional "male breadwinner" model still exists or has already been challenged affect individuals' subjective evaluations of the justice of their personal earnings. In the first step we derive three criteria used by individuals to evaluate the fairness or justice of their personal earnings: compensation for services rendered, coverage of basic needs, and the opportunity to earn social approval. In the second step, we apply considerations from household economics and new approaches from gender research to explain why men's and women's evaluations of justice are determined to a considerable degree by the specific situation within their household. The assumptions derived regarding gender-specific patterns in justice attitudes are then tested on data from the German Socio-Economic Panel Study (SOEP) from 2007 and 2005. The results support our central thesis that gender-specific patterns in the evaluation of personal earnings are both reduced and increased in dual-earner households. They are reduced because women in dual-income households tend to have higher income expectations that challenge the existing gender wage gap. At the same time, gender-specific patterns are increased because men evaluate the equity of their personal income in relation to their ability to fulfill traditional gender norms and thus their capacity to live up to corresponding notions of "masculinity". Die zunehmende Erwerbsbeteiligung von Frauen und die Ausbreitung "atypischer" Beschäftigungsverhältnisse hat zur Folge, dass der Anteil an Haushalten, in denen der Mann der alleinige Ernährer der Familie ist, abnimmt und der Anteil an Zweiverdienerhaushalten seit Jahren ansteigt. Vor diesem Hintergrund fragt dieser Beitrag, welche Bedeutung Haushaltskontexte, in denen das traditionelle male-breadwinner Modell noch existiert bzw. bereits in Frage gestellt ist, für die Bewertung der Gerechtigkeit des eigenen Erwerbseinkommens haben. Dazu werden in einem ersten Schritt drei Beurteilungskriterien der Gerechtigkeit des eigenen Einkommens hergeleitet: Kompensation erbrachter Leistungen, Bedarfsabsicherung und Ermöglichung sozialer Wertschätzung. In einem zweiten Schritt wird erläutert, warum die Gerechtigkeitsurteile von Männern und Frauen maßgeblich von der spezifischen Situation im jeweiligen Haushalt bestimmt sind. Die daraus abgeleiteten Annahmen zu geschlechtstypischen Mustern von Gerechtigkeitseinstellungen werden mithilfe von Daten des Sozio-oekonomischen Panels aus den Jahren 2007 und 2005 überprüft. Die Ergebnisse zeigen, dass in Zweiverdienerhaushalten geschlechtstypische Muster bei der Bewertung des eigenen Einkommens verringert und verstärkt werden: Verringert werden sie, weil Frauen in Zweiverdienerhaushalten höhere Ansprüche an ihr Lohnniveau haben, und verstärkt werden sie, weil Männer die Bewertung ihres Erwerbseinkommens davon abhängig machen, ob es sie in die Lage versetzt, den traditionellen Geschlechternormen und den darin transportierten Vorstellungen über "Männlichkeit" entsprechen zu können.Einkommensgerechtigkeit, Geschlecht, Zweiverdienerhaushalte, Geschlechternormen, fairness, equity, inequality, pay differentials, dual-earner households, gender, gender norms

Forced dynamic dewetting of structured surfaces: Influence of surfactants

We analyse the dewetting of printing plates for gravure printing with well-defined gravure cells. The printing plates were mounted on a rotating horizontal cylinder that is half immersed in an aqueous solution of the anionic surfactant sodium 1-decanesulfonate. The gravure plates and the presence of surfactants serve as one example of a real-world dewetting situation. When rotating the cylinder, a liquid meniscus was partially drawn out of the liquid forming a dynamic contact angle at the contact line. The dynamic contact angle is decreased on a structured surface as compared to a smooth one. This is due to contact line pinning at the borders of the gravure cells. Additionally, surfactants tend to decrease the dynamic receding contact angle. We consider the interplay between these two effects. We compare the height differences of the meniscus on the structured and unstructured area as function of dewetting speeds. The height difference increases with increasing dewetting speed. With increasing size of the gravure cells this height difference and the induced changes in the dynamic contact angle increased. By adding surfactant, the height difference and the changes in the contact angle for the same surface decreased. We further note that although the liquid dewets the printing plates some liquid is always left in the gravure cell. At high enough surfactant concentrations or high enough dewetting speed, the dynamic contact angles in the structured surface approach those in flat surfaces. We conclude that surfactant reduces the influence of surface structure on dynamic dewetting