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Institut
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The global loss of biodiversity has been widely studied, yet it has many different facets depending on the context. Key drivers for biodiversity loss are anthropogenic, including agricultural intensification, expansion and land abandonment. Though the loss of biological diversity is an ecological phenomenon, it also has a social dimension. This makes the study of the social landscape, encompassing the multitude of perspectives and aspirations by different stakeholders, highly relevant for better navigating trade-offs between biodiversity conservation and other land use objectives. Engaging with and addressing contextual understandings of biodiversity is vital to develop socially palatable solutions for biodiversity loss. This dissertation, therefore, takes a place-based approach to studying biodiversity conservation trade-offs and seeks to understand how the perspectives and aspirations of different stakeholders shape them. First, it aims to identify shared viewpoints as ensembles of perceptions and meanings about human-nature relations and biodiversity (research aim 1). Second, it aims to understand how biodiversity is valued and constructed in stakeholders’ aspirations towards their landscape (research aim 2). To this end, a convergent mixed methods approach and case study design are used. Two cases were selected that face different underlying drivers of land-use change, resulting in loss of biodiversity. The Muttama Creek Catchment area is a farming landscape in south-eastern Australia where the ongoing intensification of agricultural production threatens native biodiversity. In the Spreewald Biosphere Reserve in north-eastern Germany, land abandonment and the resulting loss of the biodiversity-rich wet meadows presents a key challenge for biodiversity conservation. Narratives and discourses provide conceptual lenses through which I study biodiversity conservation trade-offs. Drawing on Q-methodology, this dissertation identifies biodiversity-production discourses for the first case study and cultural landscape narratives for the second case study. Moreover, based on a participatory futures approach, the Three Horizons Framework, it elicits narratives of change that highlight opportunities for biodiversity conservation in farming landscapes.
The findings highlight that despite some overlap in how stakeholders perceive biodiversity, contrasting problem framings and different biodiversity priorities present hindrances to concerted action to protect biodiversity and for collaboration (research aim 1). The findings also identify shared values among stakeholders (research aim 2). However, there is polarity and contestation around the role and importance of biodiversity in rural development. In conclusion, the findings contribute to three key themes in sustainability science and conservation debates: (1) They support calls for more inclusive and pluralistic biodiversity governance and highlight the need to engage holistically with multiple trade-offs with biodiversity conservation. (2) The empirical findings highlight the potential for stewardship as a broad value for place-based actions and biodiversity disvalues as another realm of engagement to improve conservation outcomes. (3) This dissertation demonstrates how a participatory approach helped identify opportunities for change and supported collective sensemaking about current issues and ways forward. Arts-based research is suggested as an avenue for future research to engage with different ways of knowing and thinking. In conclusion, this dissertation highlights how people value biodiversity differently based on their relative perspectives, the role of biodiversity in aspirations for the future and what this means for governing the transformative changes needed to address the issue of biodiversity loss.
The world wide population growth and the increasing water scarcity endanger more and more the human society. Water saving measures alone will not be sufficient to solve all associated problems. Therefore, people in arid countries might come back to any kind of water available. In this context the way people regard wastewater must change in terms that it has to be recognized as a water resource. The reuse of wastewater, treated and untreated, for irrigation purposes in agriculture is already established in some semi-arid and arid countries. Countries with absolute water scarcity like Israel might not only be forced to reduce their water consumption, but even to transfer reused water to other sectors. Concerns of authorities and the general public about potential health risks are completely understandable. The health risks of wastewater are mainly originating from pathogens which are negatively correlated with its treatment. Therefore, the quality of a wastewater effluent derived from mechanical-biological treatment can be further improved by additional treatment steps like soil aquifer treatment (SAT). This process is adopted at the Israeli Shafdan facility in the south of Tel Aviv. Conventionally treated wastewater is applied on surface basins from where it percolates into the coastal plain aquifer which supplies approximately one quarter of Israel ́s drinking water. After a certain residence time in the subsurface the water is recovered by wells surrounding the recharge area. Although the pumping regime creates a hydraulic barrier to the pristine groundwater, concerns exist that a contamination of the surrounding drinking water wells could occur. So far, little is known about the removal of organic trace pollutants during the SAT process in general and for the Shafdan site in particular. Consequently, the need arose to study the purification power of the SAT process in terms of the removal of organic trace pollutants. For this purpose reliable wastewater tracers are essential to be able to differentiate between degradation and sorption processes on the one hand and dilution with pristine groundwater on the other hand. Based on their chemical properties, their worldwide usage in a variety of foodstuffs and beverages, and first data about the fate and occurrence of sucralose, artificial sweeteners came into the focus as promising tracer candidates.
Thus, in the present work an analytical method for the simultaneous determination of seven commonly used artificial sweeteners in different water matrices, like surface water and wastewater, was developed (see chapter 2). The method is based on the solid phase extraction (SPE) of the analytes by a styrene-divinylbenzene (SDB) copolymer material, and the analysis by liquid chromatography-electrospray ionization tandem mass-spectrometry (LC-ESI- MS/MS). The sensitivity in negative ionization mode was considerably enhanced by postcolumn addition of the alkaline modifier tris(hydroxymethyl) aminomethane. In potable water, except for aspartame and neohesperidine dihydrochalchone, absolute recoveries >75 % were obtained for all analytes under investigation, but were considerably reduced due to matrix effects in treated wastewater. The widespread distribution of the artificial sweeteners acesulfame, saccharin, cyclamate, and sucralose in the aquatic environment was proven. Concentrations in two German wastewater treatment plant (WWTP) influents ranged up to 190 μg/L for cyclamate, several tens of μg/L for acesulfame and saccharin, and about 1 μg/L for sucralose. For saccharin and cyclamate removal rates >90 % during wastewater treatment were observed, whereas acesulfame and sucralose turned out to be very persistent. As a result of high influent concentrations and low removal rates in WWTPs, acesulfame was the dominant sweetener in German surface waters with concentrations up to 2.7 μg/L. The detection of acesulfame and sucralose in recovery wells in the Shafdan SAT site in Israel in the μg/L range was a promising sign for their possible use as anthropogenic markers. As acesulfame and sucralose showed a pronounced stability in WWTPs and were detected in recovery wells of the SAT site in Israel it became worthwhile to assess their tracer suitability compared to other organic trace pollutants suggested as anthropogenic markers in the past (see chapter 3). Therefore, the prediction power of the two sweeteners was evaluated in comparison with the antiepileptic drug carbamazepine (CBZ), the X-ray contrast medium diatrizoic acid (DTA) and two benzotriazoles (1H-benzotriazole (BTZ) and its 4-methyl analogue (4TTri)). The concentrations of these compounds and their ratios were tracked from WWTPs with different treatment technologies, to recipient waters and further to river bank filtration (RBF) wells. Additionally, acesulfame and sucralose were compared with CBZ during advanced wastewater treatment by SAT in Israel. Only the persistent compounds acesulfame, sucralose, and CBZ showed stable ratios when comparing influent and effluent
concentrations of four German WWTPs with conventional wastewater treatment. However, by the additional application of powdered activated carbon in a fifth WWTP CBZ, BTZ, and 4-TTri were selectively removed resulting in a pronounced shift of the concentration ratios towards the nearly unaffected sweeteners. Results of a seven months monitoring program along the rivers Rhine and Main showed an excellent correlation between CBZ and acesulfame concentrations (r2 = 0.94), and still good values when correlating the concentrations with both benzotriazoles (r2 = 0.66 - 0.82). In RBF wells acesulfame and CBZ were again the compounds with the best concentration correlation (r2 = 0.85).
As human rights evolved to become part of a dominant moral discourse in world politics, regional organisations (ROs) often portray themselves in the language of human rights. Facing growing contestation and politicisation, they have also gradually begun to legitimate their authority drawing on human rights. Yet not all ROs do so to the same extent, in the same manner, or consistently over time. ROs with a long tradition in human rights work and democratic membership, such as the Council of Europe use it highly consistently. ROs with no historical record of human rights protection and autocratic membership, such as the Arab League (LoAS) use it too, although more irregularly. This begs the question: why and how do ROs use human rights for self-legitimation? To answers this research question, I combine a macro analysis using qualitative comparative analysis (QCA) on 23 ROs from 1980 to 2019 with a micro analysis via process-tracing in two cases – LoAS and the Caribbean Community (CARICOM).
Ultimately, ROs use human rights in their legitimation because they strive for congruence. When norms, values, and moral principles purported and embodied by the RO are congruent with those of its core constituency and all relevant audiences, I observe human rights legitimation. I argue that the degree of congruence combines with different degrees of delegitimation stemming from the distinct constellation of agents and audiences of legitimation. I circumscribe this via four types of human rights legitimisers. Testing existing theories on legitimacy, legitimation, and human rights, the QCA suggests that ‘Self-containing Legitimisers’ are ROs with a status quo of congruence between the RO and its core constituency. ‘Signalling Legitimisers’ irregularly use human rights legitimation as a signal to respond to additional audiences. Thanks to the case studies, I further refine existing theory. CARICOM constitutes a case of a ‘Reviving Legitimisers’ where delegitimation towards their core constituency occurs to which it reacts by reviving what it embodies which entails including human rights in its legitimation. With LoAS, I observe a ‘Brokering Legitimisers’ in which case delegitimation is on the verge of a legitimacy crisis, but its Secretary General manages to broker human rights to two diverging audiences thanks to localisation. Thus, this book contributes to existing research first by providing an explanation of how a distinct norm is used in self-legitimation, second by nuancing our understanding of agents and audiences of legitimation, and third by introducing the concept of localisation to the study of legitimation.
Key words: Human Rights, Self-Legitimation, Regional Organisations, Legitimacy, International Authority, Norm Diffusion, League of Arab States, Caribbean Community, Global South, International Institutions
Due to the financial markets disturbances of 2007/2008, a considerable number of financial intermediaries such as banks, credit institutions and asset management companies noticed substantial liquidity shortages, difficulties to refinance their operations as a result of a drying out of appropriate refinancing sources, and withdrawals of deposits by consumers. These turbulences in the financial markets forced governments and central banks to increase liquidity provisions to ensure a sufficient aggregate liquidity of the financial industry. Furthermore, policy-makers decided on bailouts of banks or on supporting financial intermediaries by governmental warranties or liquidity provisions to avoid a substantial number of insolvencies of banks and other financial institutions that may have rapidly deteriorated the global financial industry. In the aftermath of the crisis, politicians and economists discussed these decisions controversially because interventions by governments and central banks appear to have a deep impact on the global economy particularly in the financial industry. Moreover, legislative and regulatory authorities decided on increasing their vigilance, particularly with focus on principal-agent problems within certain sectors of the financial industry. A considerable amount of recent research papers has focused on the dynamics of liquidity shortages that suggest the recent crisis being related to both an increasing funding liquidity risk and an emerging market liquidity risk. Self-amplifying interdependencies appear to connect these two dimensions of liquidity risk that during the period 2007 to 2008 have led to the contagion effects in the global financial industry. Only little research work so far has provided evidence from the financial crisis in 2007/2008 while focusing on the German financial industry. Thus, my doctoral dissertation covers three research papers that address the occurrence of substantial liquidity risk and default probability within the German financial industry over the course of the financial crisis of 2007/2008. My first publication co-authored with Daniel Schmidt, Leuphana University of Lüneburg, entitled ‘Consumer reaction to tumbling funds - Evidence from retail fund outflows during the financial crisis 2007/2008’ focuses on funding liquidity risk of German retail funds. Contrary to the findings reported in some of the extant literature, our study indicates that over the past few years a change in investors’ behavior patterns means that investment decisions are made at short notice, and that shares are redeemed in a discriminatory manner when funds perform poorly. By using data assembled from 1672 retail funds in Germany over the period March 2008 to April 2010, we are able to show that in general, both the prior fund performance and prior net redemptions have a statistically significant influence on fund outflows. Moreover, there are indications that in recent crises situations that have resulted in the withdrawal of shares investors react fast to market signals. My second research paper entitled ‘Leveraging and risk-taking within the German banking system: Evidence from the financial crisis in 2007 and 2008’ examines the risk-taking attitudes of distinguishable German banking sectors. This study intends to examine whether the German banking system displays pro-cyclical behavior during 2000 to 2011, and to what extent specific sectors of the German banking system show significant balance sheet operations to increase their leverage during years of booming asset prices. The results of this study demonstrate that different sectors of the German banking system did operate their business more or less pro-cyclical. It also provides empirical evidence that certain banking sectors did favor refinancing their assets by short-term borrowing in the interbank market to increase their leverage during periods of extraordinary high returns in financial markets. Moreover, this study shows that banks, which operate above average leverages, tend to report a high volatility of return on assets and low distances-to-default. Finally, my third paper entitled ‘Are private banks the better banks? An insight into the ownership structure and risk-taking attitudes of German banks.’, and co-authored with Thomas Wein, Leuphana University of Lüneburg, tries to enlighten the influence of the different principal-agent relationships on the risk-taking attitudes of German banks. In this study, we propose our hypothesis that the distinguishable principal-agent relationships of German banks are significantly influencing the risk-taking attitudes of bank managers. Particularly, we intend to substantiate the theory that banks owned by dispersed shareholders or federal state authorities face a higher relevance of principal-agent problems than other banking sectors due to a missing ability to monitor bank managers. Our results underline that these problems appear to mislead bank managers showing an unreasonable risk-taking behavior. In a first stage, we rely on a theoretical model explaining that from the bank owners’ viewpoint three factors of the principal-agent relationships are determining the probability of choosing the optimal portfolio of risky assets. These factors cover the ability to control bank managers, the risk pooling capabilities of bank owners and bank managers, and the incentives of seeking high returns. To support our hypothesis we apply an empirical study to the distances-to-default of different German banking sectors. This demonstrates that risk-taking attitudes of banks are closely related to banks’ ownership. Consequently, our findings offer evidence, that legislative and regulatory authorities should increase their vigilance in terms of principal-agent problems within certain sectors of the banking industry.
In recent years, both scientists and practitioners have become interested in the affectivemotivational concept of work engagement and research on work engagement has strongly accumulated. Engaged people invest physical, affective, and cognitive resources in their work tasks and activities (Sonnentag, Dormann, & Demerouti, 2010) and high levels of work engagement involve positive consequences both for the individual and the organization (Rich, Lepine, & Crawford, 2010). The objective of this dissertation is twofold. The first and second empirical studies help to advance knowledge on antecedents of work engagement and to extend theoretical models in which work engagement is embedded. The third study aims at expanding present knowledge of the role of specific work events as proximal antecedents of distinct affective states and as distal antecedents of job attitudes and affective consequences such as work engagement by developing a taxonomy of work events. This dissertation suggests ideas for future research and provides practical implications regarding work design and human resource practices that are based on the empirical findings reported. Study 1 investigates the cognitive-motivational concept of focus on opportunities (i.e. the number of goals, plans, and possibilities employees believe themselves to have in their future) as a predictor of work engagement and a personal resource that buffers for low levels in employee’s job control. By using a cross-sectional survey study based on a sample of bluecollar workers (N = 174), and a daily diary study based on a sample of administrative employees (N = 64), this study revealed that job control was less strongly related to work engagement when people’s focus on opportunities was reported to be high. Employees with a high focus on opportunities compensated for low job control. This finding refines theoretical models of antecedents of work engagement by supporting the role of focus on opportunities as a motivational resource. The goal of Study 2 was to examine self-efficacy regarding a person‘s work role as a personal resource that helps employees to effectively regulate affective states in a way to show high levels of work engagement. The study was conducted based on a sample of 111 full-time employees who completed daily online questionnaires on affective experiences and work engagement twice a day over ten working days. Results of multilevel linear regression analysis showed that self-efficacy acted as a moderator on the relationship between daily negative affect and daily work engagement. Self-efficacy enabled people to show high levels of work engagement on days when they experience negative affective states. Moreover, the relationship between self-efficacy and work engagement was mediated by an increase of positive affect during the day. Through the mechanism of up-regulating positive affect, people high in self-efficacy succeed in maintaining daily work engagement. These results extend existing theoretical frameworks of work engagement by indicating that self-efficacy is an important personal resource that enables people to effectively regulate affective states and show high levels of work engagement. Study 3 addresses the development of a comprehensive taxonomy of daily work events that provides a frame of reference for future studies to more systematically test propositions of Affective events theory (AET) (Weiss & Cropanzano, 1996). AET provides a theoretical framework that emphasizes the role of work events as proximal antecedents of affect but does not formulate specific propositions about which kind of work events elicit distinct affective states. Based on 559 positive and 383 negative work events mentioned in three daily diary studies by an overall of 218 employees, the qualitative concept mapping methodology was used to establish the taxonomy on work events. Explorative statistical analyses resulted in four positive and seven negative work events clusters. The study provides evidence for the validity of the taxonomy by testing the relationships of the events clusters with distinct positive and negative activating and deactivating affective states.
Considering the recent success of right-wing populist candidates and parties in the United States and across Europe, there has for some years now been talk among scholars (and the wider public) about a worldwide democratic recession. Levitsky and Ziblatt paint a very gloomy picture when they write that democracy is at risk of dying. Others are not as pessimistic, but they still argue that democracy is in a state of serious disrepair. The younger generations appear to be especially unsupportive of democracy’s liberal principles and more willing to express support for authoritarian alternatives. What these authors overlook, however, is that the publics of advanced industrial societies have experienced an intergenerational value shift. In fact, populations in industrial democracies have become more liberal overall, but not everyone’s mindset is changing at the same speed. It is mainly – but not exclusively – the members of the lower classes that do not keep up. While societies have generally become more liberal, there is increasing alienation between the social classes over these liberal values. Drawing on a more recent trend in social class research with a social cognitive approach, this dissertation contributes to the study of growing anti-democratic tendencies around the world by analyzing the interplay between inequality dynamics and value orientations. The focus lies on investigating the effect socio-cultural polarization (i.e., ideological polarization between social classes) has on civic culture in the mature democracies of the West. The findings suggest that it is not ideological polarization between the social classes that has the greatest negative effect on civic culture, or general civic attitudes and behavior, for that matter. It is the increasing dissent in society about whether the country’s elites are still to be trusted with making the right decisions to increase the average citizen’s quality of life. This difference in opinion manifests itself in a decline in some civic attitudes.
This cumulative dissertation "Corporate Social Responsibility (CSR) Communication: Four empirical studies on the German banking industry" presents how commercial banks in Germany communicate their ambitions and commitment regarding corporate responsibility - i.e., CSR. The results of the first article show that the quality of mandatory non-financial reporting needs to be improved and that certain characteristics (e.g., previous reporting experience, reporting format and standard) have a positive influence on reporting quality. The second article shows that the CSR reporting scope on bank websites also has room for improvement and that various banking characteristics such as size, capital market orientation, media visibility or public ownership have an influence on communication. The third article illustrates that credit institutions in Germany are increasingly using social media for CSR communication, but that CSR communication strategies differ (Facebook vs. Twitter). The fourth article discusses CSR communication using advertisements and shows that the conceptual design of advertisements should be in line with the credit institution's business model and is therefore beneficial.
This study examines the perspective of German venture capitalists on the success factors of digital startups and follows an explorative three-dimensional research approach that integrates the micro perspective on the entrepreneurial personality, the macro perspective on the entrepreneurial context, and the meso perspective on the business model. Thus, the study operates in a very young field of entrepreneurship research.
One of the purposes of this research project is to work out the significance of particular characteristics at each research level for the economic success of a digital start-up from the perspective of German venture capitalists. Furthermore, the study sheds light on the view of this group of experts on the relevance of an entire group of characteristics.
To answer the central research questions, qualitative research methods and a mixed-methods approach are pursued, with quantitative and qualitative primary data being collected by means of theory-driven semi-structured expert interviews. As a result, a total of four articles have been produced: three articles that focus on presenting the results of qualitative research from only one of the three aforementioned research perspectives each, and a fourth article that combines methods from qualitative and quantitative research and derives an integrated, evidence-based working model of the economic success of digital startups from the perspective of German venture capital (VC) investors.