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This thesis deals with economic aspects of employees' sickness. In addition to the classical case of sickness absence, in which an employee is completely unable to work and hence stays at home, there is the case of sickness presenteeism, in which the employee comes to work despite being sick. Accordingly, the thesis at hand covers research on both sickness states, absence and presenteeism. The first section covers sickness absence and labour market institutions. Chapter 2 presents theoretical and empirical evidence that differences in the social norm against benefit fraud, so-called benefit morale, can explain cross country diversity in the generosity of statutory sick pay entitlements between developed countries. In our political economy model, a stricter benefit morale reduces the absence rate, with counteracting effects on the politically set sick pay replacement rate. On the one hand, less absence caused by a stricter norm, makes the tax-financed insurance cheaper, leading to the usual demand side effect and hence to more generous sick pay entitlements. On the other hand, being less likely to be absent due to a stricter norm, the voters prefer a smaller fee over more insurance. We document both effects in a sample of 31 developed countries, capturing the years from 1981 to 2010. In Chapter 3 we investigate the relationship between the existence of works councils and illness-related absence and its consequences for plants. Using individual data from the German Socio-Economic Panel (SOEP), we find that the existence of a works council is positively correlated with the incidence and the annual duration of absence. Additionally, linked employer-employee data (LIAB) suggests that employers are more likely to expect personnel problems due to absence in plants with a works council. In western Germany, we find significant effects using a difference-in-differences approach, which can be causally interpreted. The second part of this thesis covers two studies on sickness presenteeism. In Chapter 4, we empirically investigate the determinants of the annual duration of sickness presenteeism using the European Working Conditions Survey (EWCS). Work autonomy, workload and tenure are positively related to the number of sickness presenteeism days, while a good working environment comes with less presenteeism. In Chapter 5 we theoretically and empirically analyze sickness absence and presenteeism behaviour with a focus on their interdependence. Specifically, we ask whether work-related factors lead to a substitutive, a complementary or no relationship between sickness absence and presenteeism. In other words, we want to know whether changes in absence and presenteeism behaviour incurred by work-related characteristics point in opposite directions (substitutive), the same direction (complementary), or whether they only affect either one of the two sickness states (no relationship). Our theoretical model shows that the relationship between sickness absence and presenteeism with regard to work-related characteristics is not necessarily of a substitutive nature. Instead, a complementary or no relationship can emerge as well. Turning to the empirical investigation, we find that only one out of 16 work-related factors, namely the supervisor status, leads to a substitutive relationship between absence and presenteeism. Few of the other determinants are complements, while the large majority is either related to sickness absence or presenteeism.
Die Untersuchung beschäftigt sich mit den Prozessen und Mechanismen, die dem NATO-Beitritt Polens zugrunde liegen, insbesondere mit den Gründen für die Transformation der zivil-militärischen Beziehungen in Polen. Die Demokratisierung der zivil-militärischen Beziehungen war eines der Hauptkriterien für den Beitritt Polens in die NATO. rnVor diesem Hintergrund geht die Arbeit der Frage nach, ob nachzuweisen ist, dass der Einfluss der NATO primär für die Demokratisierung der zivil-militärischen Beziehungen Polens verantwortlich ist. Dabei stützt sich die Arbeit auf den aktuellen Forschungsstand der Theorien internationaler Sozialisation, deren Ziel es ist, die Prozesse und Mechanismen der Normübernahme von Staaten zu erklären. Der theoretische Rahmen wurde in ein Forschungsdesign eingebettet, das vielfältige Methoden für die detaillierte empirische Analyse einbezieht. Ergänzend wurden alternative und ergänzende Erklärungen überprüft, die nicht durch die Theorie abgedeckt werden. Entgegen der vorherrschenden Meinung in der Fachliteratur kommt die Untersuchung zu dem Ergebnis, dass die NATO nicht primär für die Sozialisation und damit Demokratisierung der zivil-militärischen Beziehungen in Polen verantwortlich ist. Polen ist erfolgreich in der Demokratisierung seiner zivil-militärischen Beziehungen, jedoch ist die NATO nicht erfolgreich in der Sozialisation Polens in diesem Bereich, sondern eher darin, den Demokratisierungsprozess in Polen mit Erfahrung und Expertise zu flankieren. Dieser Prozess wurde maßgeblich innenpolitisch und durch Akteure in Polen angestoßen, angetrieben, getragen und schlussendlich entschieden. Obgleich die NATO das Beitrittskriterium vorgab und die polnischen Akteure durchaus begleitete, kann darüber hinaus der Einfluss der NATO als nicht maßgeblich bewertet werden. Im Gegenteil, die Ergebnisse zeigen, dass es nicht das Ziel der NATO war, die Prozesse direkt zu beeinflussen oder zu steuern, sondern vielmehr, den Transformationsprozess der zivil-militärischen Beziehungen in Polen, insbesondere die praktische Umsetzung, durch Expertise und Erfahrungen zu begleiten und eigene Lernprozesse anzustoßen.
An einer Stichprobe mit insgesamt N = 204 Psychotherapiepatienten einer stationären Rehabilitationseinrichtung wurden die Auswirkungen der Posttraumatischen Verbitterungsstörung (Posttraumatic Embitterment Disorder; PTED) auf die berufliche Vertrauens-Trias untersucht und eine Emotionsanalyse zur Verbitterung durchgeführt. Als weitere Persönlichkeitsmerkmale wurden Ärgerneigung, Ärgerbewältigung, Zielanpassung und das arbeitsbezogene Verhaltens- und Erlebensmuster erfasst. Ein Vergleich der Patientengruppen "mit Verbitterungsaffekt" und "ohne Verbitterungsaffekt" belegt die ätiologische Relevanz der Faktoren Zielblockierung, Attribution der Verantwortung, anhaltender Ärger und misslungene Situationsbewältigung bei der Entstehung der Emotion Verbitterung. Nach den Ergebnissen einer durchgeführten MANOVA mit den drei Gruppen (PTED aufgrund eines Arbeitsplatzereignisses vorhanden; PTED aufgrund eines Arbeitsplatzereignisses nicht vorhanden; kein Arbeitsplatzereignis) unterscheiden sich die beiden Patientengruppen mit einem Arbeitsplatzereignis nicht signifikant voneinander in Bezug auf ihre berufliche Vertrauens-Trias, ihre Ärgerneigung und -bewältigung sowie ihre Zielanpassung. Allerdings haben Patienten mit Arbeitsplatzereignis eine geringere berufliche internale Kontrollüberzeugung, besitzen weniger interpersonales Vertrauen am Arbeitsplatz und ihr Vertrauen in die eigene berufliche Zukunft ist niedriger als bei Patienten ohne Arbeitsplatzereignis. Ein weiterer Unterschied sind die höheren Arbeitsunfähigkeitszahlen bei Patienten mit Arbeitsplatzereignis " mit den meisten Krankschreibungen in der Gruppe der PTED-Patienten. Im arbeitsbezogenen Verhaltens- und Erlebensmuster unterscheiden sich die drei Patientengruppen in den Skalen Ehrgeiz, Verausgabungsbereitschaft, Distanzierungsfähigkeit, Offensive Problembewältigung und Soziale Unterstützung. Auch hier unterscheiden sich hauptsächlich die beiden Gruppen mit Arbeitsplatzereignis von der Gruppe ohne Arbeitsplatzereignis, einzige Ausnahme ist das Erleben sozialer Unterstützung.
Attitudes are "the most distinctive and indispensable concept in contemporary social psychology" (Allport, 1935, p. 798). This outstanding position of the attitude concept in social cognitive research is not only reflected in the innumerous studies focusing on this concept but also in the huge number of theoretical approaches that have been put forth since then. Yet, it is still an open question, what attitudes actually are. That is, the question of how attitude objects are represented in memory cannot be unequivocally answered until now (e.g., Barsalou, 1999; Gawronski, 2007; Pratkanis, 1989, Chapter 4). In particular, researchers strongly differ with respect to their assumptions on the content, format and structural nature of attitude representations (Ferguson & Fukukura, 2012). This prevailing uncertainty on what actually constitutes our likes and dislikes is strongly dovetailed with the question of which processes result in the formation of these representations. In recent years, this issue has mainly been addressed in evaluative conditioning research (EC). In a standard EC-paradigm a neutral stimulus (conditioned stimulus, CS) is repeatedly paired with an affective stimulus (unconditioned stimulus, US). The pairing of stimuli then typically results in changes in the evaluation of the CS corresponding to the evaluative response of the US (De Houwer, Baeyens, & Field, 2005). This experimental approach on the formation of attitudes has primarily been concerned with the question of how the representations underlying our attitudes are formed. However, which processes operate on the formation of such an attitude representation is not yet understood (Jones, Olson, & Fazio, 2010; Walther, Nagengast, & Trasselli, 2005). Indeed, there are several ideas on how CS-US pairs might be encoded in memory. Notwithstanding the importance of these theoretical ideas, looking at the existing empirical work within the research area of EC (for reviews see Hofmann, De Houwer, Perugini, Baeyens, & Crombez, 2010; De Houwer, Thomas, & Baeyens, 2001) leaves one with the impression that scientists have skipped the basic processes. Basic processes hereby especially refer to the attentional processes being involved in the encoding of CSs and USs as well as the relation between them. Against the background of this huge gap in current research on attitude formation, the focus of this thesis will be to highlight the contribution of selective attention processes to a better understanding of the representation underlying our likes and dislikes. In particular, the present thesis considers the role of selective attention processes for the solution of the representation issue from three different perspectives. Before illustrating these different perspectives, Chapter 1 is meant to envision the omnipresence of the representation problem in current theoretical as well as empirical work on evaluative conditioning. Likewise, it emphasizes the critical role of selective attention processes for the representation question in classical conditioning and how this knowledge might be used to put forth the uniqueness of evaluative conditioning as compared to classical conditioning. Chapter 2 then considers the differential influence of attentional resources and goal-directed attention on attitude learning. The primary objective of the presented experiment was thereby to investigate whether attentional resources and goal-directed attention exert their influence on EC via changes in the encoding of CS-US relations in memory (i.e., contingency memory). Taking the findings from this experiment into account, Chapter 3 focuses on the selective processing of the US relative to the CS. In particular, the two experiments presented in this chapter were meant to explore the moderating influence of the selective processing of the US in its relation to the CS on EC. In Chapter 4 the important role of the encoding of the US in relation to the CS, as outlined in Chapter 3, is illuminated in the context of different retrieval processes. Against the background of the findings from the two presented experiments, the interplay between the encoding of CS-US contingencies and the moderation of EC via different retrieval processes will be discussed. Finally, a general discussion of the findings, their theoretical implications and future research lines will be outlined in Chapter 5.
Mankind has dramatically influenced the nitrogen (N) fluxes between soil, vegetation, water and atmosphere " the global N cycle. Increasing intensification of agricultural land use, caused by the growing demand for agricultural products, has had major impacts on ecosystems worldwide. Particularly nitrogenous gases such as ammonia (NH3) have increased mainly due to industrial livestock farming. Countries with high N deposition rates require a variety of deposition measurements and effective N monitoring networks to assess N loads. Due to high costs, current "conventional"-deposition measurement stations are not widespread and therefore provide only a patchy picture of the real extent of the prevailing N deposition status over large areas. One tool that allows quantification of the exposure and the effects of atmospheric N impacts on an ecosystem is the use of bioindicators. Due to their specific physiology and ecology, especially lichens and mosses are suitable to reflect the atmospheric N input at ecosystem level. The present doctoral project began by investigating the general ability of epiphytic lichens to qualify and quantify N deposition by analysing both lichens and total N and δ15N along a gradient of different N emission sources and severity. The results showed that this was a viable monitoring method, and a grid-based monitoring system with nitrophytic lichens was set up in the western part of Germany. Finally, a critical appraisal of three different monitoring techniques (lichens, mosses and tree bark) was carried out to compare them with national relevant N deposition assessment programmes. In total 1057 lichen samples, 348 tree bark samples, 153 moss samples and 24 deposition water samples, were analysed in this dissertation at different investigation scales in Germany.The study identified species-specific ability and tolerance of various epiphytic lichens to accumulate N. Samples of tree bark were also collected and N accumulation ability was detected in connection with the increased intensity of agriculture, and according to the presence of reduced N compounds (NHx) in the atmosphere. Nitrophytic lichens (Xanthoria parietina, Physcia spp.) have the strongest correlations with high agriculture-related N deposition. In addition, the main N sources were revealed with the help of δ15N values along a gradient of altitude and areas affected by different types of land use (NH3 density classes, livestock units and various deposition types). Furthermore, in the first nationwide survey of Germany to compare lichens, mosses and tree bark samples as biomonitors for N deposition, it was revealed that lichens are clearly the most meaningful monitor organisms in highly N affected regions. Additionally, the study shows that dealing with different biomonitors is a difficult task due to their variety of N responses. The specific receptor surfaces of the indicators and therefore their different strategies of N uptake are responsible for the tissue N concentration of each organism group. It was also shown that the δ15N values depend on their N origin and the specific N transformations in each organism system, so that a direct comparison between atmosphere and ecosystems is not possible.In conclusion, biomonitors, and especially epiphytic lichens may serve as possible alternatives to get a spatially representative picture of the N deposition conditions. Furthermore, bioindication with lichens is a cost-efficient alternative to physico-chemical measurements to comprehensively assess different prevailing N doses and sources of N pools on a regional scale. They can at least support on-site deposition instruments by qualification and quantification of N deposition.
In der Folge der großen Datenschutzskandale seit dem Jahre 2006, darunter die illegalen Daten-Screenings bei der Bahn AG, oder auch der "Lidl-Skandal", bei dem Arbeitnehmer und Arbeitnehmerinnen bis in die Intimsphäre heimlich überwacht worden sind, ist das Thema Datenschutz stark in den Fokus der Öffentlichkeit gerückt. Schon seit den 80er Jahren liegt ein Gesetzentwurf zum Datenschutz für Arbeitnehmer in den ministerialen Schubladen, aber auch der letzte Anlauf zur gesetzlichen Sicherung der informationellen Selbstbestimmung der Beschäftigten scheiterte im Frühjahr des Jahres 2013. Das große Bedürfnis einer gesetzlichen Ausgestaltung dieser Materie besteht nach wie vor. Dies kann jedoch nur gelingen, wenn es endlich zu einem gesellschaftlichen Konsens, vor allem auch international, über das Gewicht gegenläufiger Werte wie wirtschaftlicher Effizienz, dem Schutz des Arbeitgebers vor Schädigung durch den Arbeitnehmer, sowie dem staatlichen Verfolgungsinteresse kommt. Vor allem aber bedarf es auch einer erhöhten Sensibilität für datenschutzrechtliche Probleme, sowohl in der Bevölkerung, als auch bei Verwaltung und Justiz.
Wegen der vielfältigen Kenntnisse und Perspektiven, die die Mitglieder von Gruppen besitzen, werden anstelle von Individuen oft Gruppen an Verhandlungen beteiligt. Allerdings konzentrierte sich die bisherige Forschung auf den Austausch und die Integration von Informationen zwischen Verhandlungsgruppen. Informationen innerhalb von Verhandlungsgruppen wurden dagegen als von den Gruppenmitgliedern geteilt angesehen. Daher wurde Informationsverarbeitung innerhalb von Verhandlungruppen und ihre Folgen für die gemeinsamen Ergebnisse der Parteien in integrativen Win-Win-Verhandlungen vernachlässigt. Im Rahmen dieser Dissertation wird angenommen, dass ein Unterschieds-Mindset (d.h. eine besondere Sensibilität für Unterschiede) (1) durch eine hohe Diversität in Gruppen aktiviert wird, (2) die Projektion von Gruppenmitgliedern auf andere Gruppenmitglieder reduziert, (3) die Qualität der ersten Forderung durch eine verbesserte Informationsverarbeitung innerhalb der Gruppen erhöht und (4) die gemeinsamen Verhandlungsergebnisse durch eine verbesserte Informationsverarbeitung innerhalb der Gruppen (5a) vor und während Zwischen-Gruppen-Verhandlungen und (5b) vor Repräsentantenverhandlungen steigert. These 1 wurde durch eine experimentelle Onlinestudie mit manipulierter Rückmeldung über hohe (vs. niedrige) Gruppendiversität (Studie 1) bestätigt. These 2 wurde durch eine experimentelle Studie mit manipulierten Online-Gruppen und komparativen Mindsets (Ähnlichkeiten vs. Unterschiede) als unabhängige Variablen (Studie 2) bestätigt. These 3 konnte von einer experimentellen Laborstudie mit Zwischen-Gruppen-Verhandlungen (Studie 3) nicht gestützt werden, wohl aber durch eine experimentelle Laborstudie mit Repräsentantenverhandlungen (Studie 4). Beide Studien unterstützen ebenfalls These 4 und 5, mit der Einschränkung, dass ein Unterschieds-Mindset die gemeinsamen Ergebnisse in einer Zwischen-Gruppen-Verhandlung nur durch die Informationsverarbeitung während der Verhandlung beeinflusst, nicht durch die Verarbeitung zuvor. Beiträge, Grenzen und Implikationen für die zukünftige Forschung werden diskutiert.
This dissertation includes three research articles on the portfolio risks of private investors. In the first article, we analyze a large data set of private banking portfolios in Switzerland of a major bank with the unique feature that parts of the portfolios were managed by the bank, and parts were advisory portfolios. To correct the heterogeneity of individual investors, we apply a mixture model and a cluster analysis. Our results suggest that there is indeed a substantial group of advised individual investors that outperform the bank managed portfolios, at least after fees. However, a simple passive strategy that invests in the MSCI World and a risk-free asset significantly outperforms both the better advisory and the bank managed portfolios. The new regulation of the EU for financial products (UCITS IV) prescribes Value at Risk (VaR) as the benchmark for assessing the risk of structured products. The second article discusses the limitations of this approach and shows that, in theory, the expected return of structured products can be unbounded while the VaR requirement for the lowest risk class can still be satisfied. Real-life examples of large returns within the lowest risk class are then provided. The results demonstrate that the new regulation could lead to new seemingly safe products that hide large risks. Behavioral investors who choose products based only on their official risk classes and their expected returns will, therefore, invest into suboptimal products. To overcome these limitations, we suggest a new risk-return measure for financial products based on the martingale measure that could erase such loopholes. Under the mean-VaR framework, the third article discusses the impacts of the underlying's first four moments on the structured product. By expanding the expected return and the VaR of a structured product with its underlying moments, it is possible to investigate each moment's impact on them, simultaneously. Results are tested by Monte Carlo simulation and historical simulation. The findings show that for the majority of structured products, underlyings with large positive skewness are preferred. The preferences for variance and for kurtosis are ambiguous.
Stress has been considered one of the most relevant factors promoting aggressive behavior. Animal and human pharmacological studies revealed the stress hormones corticosterone in rodents and cortisol in humans to constitute a particularly important neuroendocrine determinate in facilitating aggression and beyond that, assumedly in its continuation and escalation. Moreover, cortisol-induced alterations of social information processing, as well as of cognitive control processes, have been hypothesized as possible influencing factors in the stress-aggression link. So far, the immediate impact of a preceding stressor and thereby stress-induced rise of cortisol on aggressive behavior as well as higher-order cognitive control processes and social information processing in this context have gone mostly unheeded. The present thesis aimed to extend the hitherto findings of stress and aggression in this regard. For this purpose two psychophysiological studies with healthy adults were carried out, both using the socially evaluated-cold pressor test as an acute stress induction. Additionally to behavioral data and subjective reports, event related potentials were measured and acute levels of salivary cortisol were collected on the basis of which stressed participants were divided into cortisol-responders and "nonresponders. Study 1 examined the impact of acute stress-induced cortisol increase on inhibitory control and its neural correlates. 41 male participants were randomly assigned to the stress procedure or to a non-stressful control condition. Beforehand and afterwards, participants performed a Go Nogo task with visual letters to measure response inhibition. The effect of acute stress-induced cortisol increase on covert and overt aggressive behavior and on the processing of provoking stimuli within the aggressive encounter was investigated in study 2. Moreover, this experiment examined the combined impact of stress and aggression on ensuing affective information processing. 71 male and female participants were either exposed to the stress or to the control condition. Following this, half of each group received high or low levels of provocation during the Taylor Aggression Paradigm. At the end of the experiment, a passive viewing paradigm with affective pictures depicting positive, negative, or aggressive scenes with either humans or objects was realized. The results revealed that men were not affected by a stress-induced rise in cortisol on a behavioral level, showing neither impaired response inhibition nor enhanced aggressive behavior. In contrast, women showed enhanced overt and covert aggressive behavior under a surge of endogenous cortisol, confirming previous results, albeit only in case of high provocation and only up to the level of the control group. Unlike this rather moderate impact on behavior, cortisol showed a distinct impact on neural correlates of information processing throughout inhibitory control, aggression-eliciting stimuli, and emotional pictures for both men and women. At this, stress-induced increase of cortisol resulted in enhanced N2 amplitudes to Go stimuli, whereas P2 amplitudes to both and N2 to Nogo amplitudes retained unchanged, indicating an overcorrection and caution of the response activation in favor of successful inhibitory control. The processing of aggression-eliciting stimuli during the aggressive encounter was complexly altered by stress differently for women and men. Under increased cortisol levels, the frontal or parietal P3 amplitude patterns were either diminished or reversed in the case of high provocation compared to the control group and to cortisol-nonresponders, indicating a desensitization towards aggression-eliciting stimuli in males, but a more elaborate processing of those in women. Moreover, stress-induced cortisol and provocation jointly altered subsequent affective information processing at early as well as later stages of the information processing stream. Again, increased levels of cortisol led opposite directed amplitudes in the case of high provocation relative to the control group and cortisol-nonresponders, with enhanced N2 amplitudes in men and reduced P3 and LPP amplitudes in men and women for all affective pictures, suggesting initially enhanced emotional reactivity in men, but ensuing reduced motivational attention and enhanced emotion regulation in both, men and women. As a result, these present findings confirm the relevance of HPA activity in the elicitation and persistence of human aggressive behavior. Moreover, they reveal the significance of compensatory and emotion regulatory strategies and mechanisms in response to stress and provocation, indorsing the relevance of social information and cognitive control processes. Still, more research is needed to clarify the conditions which lead to the facilitation of aggression and by which compensatory mechanisms this is prevented.
In splitting theory of locally convex spaces we investigate evaluable characterizations of the pairs (E, X) of locally convex spaces such that each exact sequence 0 -> X -> G -> E -> 0 of locally convex spaces splits, i.e. either X -> G has a continuous linear left inverse or G -> E has a continuous linear right inverse. In the thesis at hand we deal with splitting of short exact sequences of so-called PLH spaces, which are defined as projective limits of strongly reduced spectra of strong duals of Fréchet-Hilbert spaces. This class of locally convex spaces contains most of the spaces of interest for application in the theory of partial differential operators as the space of Schwartz distributions , the space of real analytic functions and various spaces of ultradifferentiable functions and ultradistributions. It also contains non-Schwartz spaces as B(2,k,loc)(Ω) and spaces of smooth and square integrable functions that are not covered by the current theory for PLS spaces. We prove a complete characterizations of the above problem in the case of X being a PLH space and E either being a Fréchet-Hilbert space or a strong dual of one by conditions of type (T ). To this end, we establish the full homological toolbox of Yoneda Ext functors in exact categories for the category of PLH spaces including the long exact sequence, which in particular involves a thorough discussion of the proper concept of exactness. Furthermore, we exhibit the connection to the parameter dependence problem via the Hilbert tensor product for hilbertizable locally convex spaces. We show that the Hilbert tensor product of two PLH spaces is again a PLH space which in particular proves the positive answer to Grothendieck- problème des topologies. In addition to that we give a complete characterization of the vanishing of the first derivative of the functor proj for tensorized PLH spectra if one of the PLH spaces E and X meets some nuclearity assumptions. To apply our results to concrete cases we establish sufficient conditions of (DN)-(Ω) type and apply them to the parameter dependence problem for partial differential operators with constant coefficients on B(2,k,loc)(Ω) spaces as well as to the smooth and square integrable parameter dependence problem. Concluding we give a complete solution of all the problems under consideration for PLH spaces of Köthe type.