PhD students of the Department of Management Sciences

Applied research in economics is extremely diverse. In the following, we provide a small insight into the variety of research topics and list who supervises our doctoral students at H-BRS (last update april 2024). Further links lead to research institutes, cooperation partners, publications, etc.

Andrew Boogaards, IZNE
Indigenous Peoples from around the world have been observing a continuous state of rural economic transformation. At a fundamental level, the integration of market-based economic activities into traditional lifestyles has had a profound impact on their culture, environment, and livelihoods. Ph.D. student Andrew Boogaards has been working with Indigenous communities in southern Guyana to study the diverse livelihood strategies that local Indigenous Peoples utilise in order to balance their traditional practices with market-based activities, particularly during a global pandemic. In his study, he will examine how protective measures that were designed to prevent the introduction of COVID-19 to the region have impacted economic relationships between local residents and gold miners, and if a disruption in this relationship has led residents to transition away from market-based activities and towards traditional subsistence activities.
Supervisor: Prof. Dr. Katja Bender

Paul Bossauer
At 45 %, motorized individual transport is still the most frequently chosen means of transport in Germany. At the same time, private vehicles stand unused in public spaces for an average of 23 hours a day. Especially in rural areas, people are dependent on private vehicles because of a lack of mobility alternatives such as sharing services. Missing mobility services is often due to the lack of economic benefits for mobility providers. In his doctoral thesis, doctoral student Paul Bossauer is investigating how new technologies, e.g. the blockchain technology, can be usefully applied to improve the mobility offer in rural areas and especially to promote the sharing of vehicles by municipalities, associations, companies with their own fleets and private individuals. Paul Bossauer is doing his research at the Projekt maas4 at Forschungsgruppe Verbraucherinformatik
Supervisor: Prof. Dr. Dirk Schreiber/ Prof. Dr. Gunnar Stevens

Lena Recki, née Cassens
Dynamic price models are no longer uncommon in some sectors, especially for travel and flight bookings. Due to changing market conditions, prices for identical products are adjusted dynamically over time and now in real time. In her research, Lena Recki  deals with the effects of this pricing policy on consumer behaviour. With her findings she wants to show how customers perceive and accept dynamic prices and what potential the model offers in industries such as food retailing. Since 2019, Lena Recki holds a scholarship of the Graduate Institute (Reiner Clement-scholarship).
Betreuung: Prof. Dr. Gunnar Stevens

Erik Dethier, IVI

Due to the steady advance of digitalisation, it can be commonly observed that all products are increasingly developing into services in runtime contracts (subscriptions). In this context, the term "Everything-as-a-Service" (XaaS) is usually used. As a result, consumers are entering into more and more (term) contracts over which they need to keep an overview (e.g. compare, monitor terms, etc.) and interact with providers (e.g. cancel). To support this, there are already many apps, service providers and emerging start-ups. PhD student Erik Dethier is looking at how information technology can help consumers manage their contracts, finances and thus their providers. Together with his colleagues from the research group Consumer Informatics, he is conducting research on consumers and their acceptance and integration of such IT into their everyday practices, as well as on developers of such IT/apps.
Supervision: Prof. Dr. Gunnar Stevens/ Prof. Dr. Alexander Boden

Silvia Berenice Fischer, IZNE
Cities are highly prone to the impacts of extreme weather events; impacts such as: rise in extreme temperatures, increase in extreme rainfalls and floods, heat-island aggravation, yield decrease and urban food insecurity are expected to increase the vulnerability of urban agricultural systems. In this sense, vulnerability and risk assessments are essential to enable practitioners and decision-makers to identify who are the vulnerable social groups and why, to establish effective adaptation action. Taking the case of Sao Paulo city, from a socio-ecological perspective, PhD student Silvia Berenice Fischer aims to assess the extreme weather events vulnerability of urban and peri-urban agriculture and the current adaptation strategies. Through a mixed-methods approach, she characterizes vulnerability and analyzes the urban farmer´s adaptation strategies. Her study will contribute to the development of policy options to enhance resilience and reduce vulnerability to extreme weather events.
Supervisor: Prof. Dr. Wiltrud Terlau

Alina Gerke
Compared to men, women are much less likely to decide to start their own business. Although both sexes face a number of hurdles in the start-up process, female entrepreneurs in particular are still too often afraid that they will not be able to reconcile starting up a business with having a family. However, the key factor for entrepreneurial success, especially in such an initial phase, is the individual ability to deal with stress effectively and in the long term. Because the issue of health is also becoming increasingly important, healthy (self-) leadership is not only significant for the performance of female founders. As leaders, they also serve as role models. With the aim of increasing women's motivation to start a business and their success in doing so, doctoral student Alina Gerke is developing a gender- and phase-specific support concept based on empirical research that focuses in particular on strengthening the work-life balance and building up health-related resources.

Supervisor: Prof. Dr. Patrizia Ianiro-Dahm

Pascal Görres
Family businesses can be found all over the world in the most diverse forms. Everything is represented, from the smallest company to the internationally operating large enterprise. As different as family businesses are, they all face the great challenge of company succession at some point in time. How can the success of such a business succession be ensured? This is where controlling comes into play. Doctoral student Pascal Görres examines the extent to which controlling can act as an enabler for a successful succession process and what influence it can thus have on a sustainable company survival. In doing so, the special characteristics of the different types of family-owned companies and their individual forms of controlling should also be taken into account.
Supervisor: Prof. Dr. Andreas Wiesehahn

Andreas Hahn
What will mobility look like in the future? In view of climate change, high levels of particulate matter and congested inner cities, this question is currently the subject of social negotiation, and it is a very emotional one. For doctoral student Andreas Hahn, the human being with his or her individual needs is the focus of mobility. One focus of his transport research is on the role of local public transport (ÖPNV) in the context of a necessary shift from motorised private transport, which is still dominant throughout Germany (IV). In this context, he is particularly concerned with the impact of technological developments such as Smart City on future mobility.
Supervisors: Prof. Dr. Dirk Schreiber, Prof. Dr. Gunnar Stevens

Ben Lenk-Ostendorf
Climate change is one of the biggest global threats and challenges. In the coming years, there must be massive social and economic change to meet the goals of the Paris Climate Agreement. To bring about this major transformation, there needs to be broad support from the population. Doctoral student Ben Lenk-Ostendorf is conducting research with the aim of guaranteeing this support and giving the change a positive connotation. To this end, he is dealing with knowledge transfer, calls to action and attitudes towards climate protection and is trying to find out how gamification can help to improve these processes. He tries to spread climate activism in a playful way and develops interdisciplinary software for this purpose. Want to join in? Visit klimapunks.de/app for more information on the current project.

Supervision: Prof. Dr. Christine Syrek

Klaudia Michalek-Kursawe, IZNE
Over the past few years, developing and emerging countries have increasingly tried out new concepts for extending social health insurance to the informal sector. A nationwide insurance of the entire population in the form of universal health insurance is one of them. However, entitlement to insurance benefits can also create incentives to change behaviour. For this reason, Klaudia Michalek-Kursawe's research examines the effects of universal health insurance on labour market variables and human capital in the informal sector. The focus is particularly on workers with a low level of human capital, who are mostly in unskilled work in the agricultural sector. It also examines which policy instruments can promote a transition to formal employment.
Supervision: Prof. Dr. Katja Bender

Cathleen Müller

Rural areas have to deal with many difficulties, such as demographic change, vacant buildings, the migration of residents to the cities and increasingly uninhabited town centres. On the other hand, many jobs are becoming more and more digital and can be done remotely, so that life in the countryside is becoming attractive again for younger people. This is where the concept of rural coworking spaces fits in. Vacant buildings (such as old manor houses or train stations) can be used again, attract young people to the countryside, fill villages with more life again and enable digital working, innovation and start-ups on site. The aim of this dissertation is to research these places and to determine success factors that support and facilitate their operation but also the founding of new businesses.

Supervision: Klaus Deimel

Ana Maria Perez Arredondo, IZNE
Doctoral student Ana Maria Perez Arredondo researches the interconnections of humans and animals with their environment, better known as the "One-Health" approach, and its integration into Ghana's country policy. Her interest lies in the capital of Ghana, Accra, and the inter-sectoral cooperation there, which has enabled various actors to pursue comprehensive health outcomes for all. As the inclusion of the "One-Health" approach in Ghana's political agenda is relatively new, PhD student Ana Maria Perez Arredondo evaluates the processes of policy development and implementation and examines the relationship between different environments (e.g. social, political, economic, built, natural), and their impact on health and poverty.
Supervisor: Prof. Dr. Katja Bender

Anna Röltgen
Digital media are changing the way we communicate and thus also the way we work together within teams and between managers and employees. Doctoral student Anna Röltgen investigates which leadership behaviors have a motivating effect in digital collaboration, which skills are a prerequisite for good digital collaboration and how this can be improved.
Supervisor: Prof. Dr. Christine Syrek

Usha Singh
"War for Talent" is the battle for qualified employees in times of a shortage of skilled workers. Due to globalization and demographic change, German companies are also in the midst of this battle for the best brains. PhD student Usha Singh investigates how areas of personnel planning in companies can be optimized: To what extent can visible features such as facial expressions or generational affiliation be used in application procedures? Do younger generations, in particular Generation Y, have different job ideas than people belonging to older generations? Different older employees may also have different health needs. For this reason, Usha Singh also questions trends in sustainable company health management, especially with regard to the design of breaks. Since 2017, Usha Singh is scholarshipholder of the Graduate Institute (Reiner Clement-Stipendium).
Betreuung: Prof. Dr. Theo Peters

Michelle Walther (IVI)
Online customer reviews on platforms such as Amazon or Ebay are increasingly being used by consumers to make the right decision when choosing online products. But what if they are fake? Fake customer reviews have the intention to mislead customers and influence their purchase decision. They are often written by people who have little or no experience with the product. They can be unfoundedly positive to promote a product or unfoundedly falsely negative to harm competing products. Doctoral student Michelle Walther's research focuses on human detection of these so-called fake reviews to help consumers better defend themselves against them. Michelle Walther is doing her doctorate in cooperation with the University of Twente in the Netherlands.

Supervision: Dr. Steven Watson, Dr. Mariëlle Stel, Prof. Dr. Alexander Boden