Over the past decades, globalisation dynamics have experienced a shift in regard to their driving economic sectors. At the beginning of the 21st century, the global economy will no longer be primarily driven by manufacturing companies but by companies in the service sector. Among them are large retail companies that, with their demand-driven supply chains, organise the global economy to a significant degree. The retail sector represents a particular case within internationalisation dynamics. With its special characteristics and logics it poses special challenges to internationally expanding companies. This is reflected in the facts that the intensive expansion phase of retail trade began relatively late compared to other sectors and that the sector’s level of internationalisation is still comparatively low. This paper focuses on two aspects of retail internationalisation that are underrepre-sented in research. (1) International expansion is by no means the final stage of international economic integration. Coe and Wrigley (2017) speak of a new era of globalised distribution, characterised by, among other things, the concentration of leading retailers on their strong foreign markets and the withdrawal of their operations from other countries. However, our understanding of these dynamics, their drivers, and their effects is inconsistent. This dissertation contributes to closing this gap and brings a new empirical perspective into the research literature by discussing the perspective of the market of inward for-eign direct investment (FDI). This is novel as, until now, research in this area has largely been based on the view of internationalizing companies’ Western home markets. In addition, this dissertation adds a new level of investigation through the exhaustive examination of a market (for the sub-sector of grocery retailing). (2) Beyond the import of financial capital, potential knowledge transfers into the local economy are an important argument for opening up to FDI. The extent to which the knowledge base of an economy is actually improved and upgrading processes of local companies are driven by the entry of a transnational company (TNC), seems to depend strongly on the degree of a TNC’s local embeddedness. This varies according to the sector and the corporate strategy. We know very little about knowledge transfer and up-grading in the context of internationalisation processes in the retail sector, as the discussion on cross-border knowledge transfer through FDI and the discussion on the internationalisation of the retail sector have so far largely been conducted separately. This dissertation contributes to the connection of these research strands. In this respect, it helps to correct the ‘production bias’, the strong orientation of the scientific discourse on knowledge transfer and upgrading towards the manufacturing, technology-intensive industry. The overall goal of the dissertation is to make an empirically derived contribution to research on retail internationalisation and its local effects in emerging markets from the perspective of relational economic geography. The dissertation addresses the dynamics, drivers, decision-making processes, and traces of FDI in the retail sector. In addition, it examines horizontal and vertical knowledge transfers and the upgrading processes of local suppliers of fresh food triggered by FDI. The study is based on the global production network-approach (Henderson et al. 2002), which conceptualises TNCs as networks whose subsidiaries are embedded in a particular context. The global value chain-approach (Gereffi et al. 2005) and the concept of up-grading, which is discussed in its context, are used as a framework for analysis. This approach is helpful to analyse the mobility of actors within a value chain toward a more advantageous position and the role of buyer companies in these developments. The dissertation combines the GVC research with the literature on (local) knowledge transfer. It uses the distinction between explicit and implicit knowledge developed by Polanyi (1958) to analyze the extent to which knowledge is transferred by FDI across national borders. Thus, the dissertation contributes to the link between GVC/GPN research and research on international knowledge transfer/the local acquisition of skills, which has been largely lacking. The dissertation uses the regional example of Turkey. The country stands as an example for the group of emerging countries. Due to dynamic economic development and significant FDI inflows, it represents a suitable and interesting case in the context of this thesis’s research interest. To gain a deeper understanding of the internationalisation dynamics of the retail sector, including their drivers and effects on local economic development, the study follows a qualitative research approach. The analyses are based on data collected in guideline-based, qualitative interviews. A total of 71 semi-structured interviews were conducted in Turkey between summer 2015 and spring 2016. Among the interviewees are 32 managers of transnational and local food retailers, 28 managers of supplier companies of fresh fruit and vegetables, and 10 experts of the retail and agricultural sector in Turkey. The study shows current dynamics and drivers of the retail sector’s internationalisation processes. At the beginning of the new millennium, the investment trend in Turkey reversed and foreign divestments (FD) started to dominate the sector. In the meantime, all transnational food retailers have divested from the market. This development illus-trates the dynamics of the new era of retail distribution to an extent not previously described. The actors in the (former) host market emphasise the defensive character of this FD. They see the operational challenges and the inability or unwillingness of the TNC to adjust to the market as reasons for the failures in the foreign market. This assessment contradicts the statements of the management in the TNC's home markets and partly also the scientific literature, which is mainly based on interviews with these actors. They emphasise the offensive character of FD. By bringing together the perspec-tives of the host- and the home market a holistic picture of the decision-making process behind FD emerges. It shows that the divestment decision is not only the reversal of an expansion decision, but follows its own logic (see Figure 8 on page 72). The dissertation demonstrates that foreign retailers import company-specific re-sources from their corporate networks into the host market and thus influence the development of the local retail sector. Comparing the results of this work on the channels of horizontal knowledge transfer with the results of the literature subject to a produc-tion bias, it becomes clear that demonstration and imitation effects are of particular importance due to the high visibility of retail practices. However, despite the compara-tively low-tech nature of retail, transfer processes go far beyond demonstration and imitation. All transfer channels discussed in the literature on the manufacturing sector are relevant to retail. The transfer of implicit knowledge takes place in particular through joint ventures/acquisitions and the fluctuation of personnel. The study further reveals vertical knowledge transfers from foreign retailers to local suppliers of fresh fruit and vegetables and shows that TNCs proactively shape the de-velopment of their suppliers in the host market. Motivated by an initial lack of adequate suppliers, transnational retailers are proving to be an important driver for the moderni-sation of this supplying industry. The deep (purchasing) network embeddedness of re-tail favours knowledge transfer through backward integration. In order to remain a permanent part of the modernizing supplier network, suppliers must vertically inte-grate functions up and down the value chain, including agricultural production. This is driven forward by retailers through direct involvement and through the targeted selection of suppliers. After TNCs withdraw their capital from the host market, the knowledge of the subsidiaries, in former employees and incorporated in established practices, remains in the host market. The dissertation shows that local companies that take over the TNCs’ subsidiaries use this knowledge in different ways. The successful among them develop hybrid business strategies. They use the TNCs' company-specific knowledge, in particular purchasing practices. But they also bring their local resources into the company which is particularly expressed in a deep sales-side network embeddedness and speed in decision-making processes. The dissertation makes conceptual contributions at various levels. First, it illustrates the broad spectrum from localisation to internationalisation within which the processes summarised under the term globalisation are classified. Localisation processes seem to overlap with internationalisation processes, especially when internationalisation is driven by market seeking motives, which are often central in the service sector. The dis-sertation further expands the research literature by linking the literature on retail internationalisation with the literature on local knowledge transfer in the context of FDI. It thereby contributes to a better understanding of the role of TNCs in the dissemination of knowledge in global networks or chains and the formation of local capabilities. Detached from the transnational and sectoral context, the study establishes causal links between FDI and local effects by providing insights into mechanisms of knowledge transfer that remain hidden in quantitative research. The work moreover contributes to the literature on upgrading in GVCs by refining the upgrading concept for the specific context of the agri-food sector. The results of the dissertation are of applied relevance for both actors from emerging countries receiving FDI and for managers of transnational retail companies. One of the most important findings for actors from FDI-receiving economies is that FDI in the re-tail sector can also be a constructive force. A certain degree of target compatibility can create advantages for all parties involved. Local retailers can acquire knowledge from international retailers operating in the country. The dissertation shows retail managers how they can make use of this possibility. It also shows managers of local suppliers of fresh food how they can take advantage of upgrading opportunities through cooperation with foreign retailers and how they can secure themselves a place in the supply network in the long term. The dissertation further provides orientation for managers of transnational retailers in their entry into foreign markets. It gives insights into how to actively embed in the host country in the context of cross-border expansion and which factors should be taken into account when deciding on a FD.

The aim of this dissertation is to contribute to a better understanding of highly skilled (re-)migrants as labour force in multinational enterprises (MNEs) and their role in cross-border knowledge transfers. To achieve this goal, an actor-centred research perspective will be adopted, which allows for a detailed examination of both individual employees and strategies of MNEs. The basic conceptual understanding of this work is based on the relational economic-geographical approach (Bathelt and Glückler 2002), on the basis of which research strands and theories of economic geography, international business studies and migration studies were intertwined. The empirical study is based on the example of highly skilled (re-)migrants of Turkish origin who work for German companies in Turkey. The study focuses on (re-)migrants of Turkish origin who have obtained a university degree in Germany. The study follows a qualitative research design based on 95 semi-structured interviews. The interviews were conducted with highly skilled (re-)migrants as well as with company internal and external experts. In addition to the semi-structured interviews, a netnographic collection of data from an online group for (re-)migrants of Turkish origin is conducted. The findings of this thesis show that highly skilled (re-)migrants of Turkish origin who have obtained a university degree in Germany are not to be regarded as a homogeneous group but rather have diverse educational and career paths. In addition to their high level of education, they have excellent language skills (mostly Turkish, German and English). They are also mostly familiar with the cultural and institutional contexts in Germany and Turkey, which, according to Hess (2004), is referred to as dual societal embeddedness. Highly skilled (re-)migrants of Turkish origin are important transnational experts for German companies in Turkey. They are particularly in demand if the companies 1) have a strong orientation towards German-speaking markets and/or 2) are dependent on close cooperation with German company locations. In these companies, highly skilled (re-)migrants of Turkish origin are strategically deployed in central areas of the company, where they often work at interfaces due to their transnational abilities, which require close contact with local employees and employees of German company locations. The empirical results also show that highly skilled (re-)migrants of Turkish origin make a significant contribution to the cross-border knowledge transfers in German companies in Turkey. Highly skilled (re-)migrants of Turkish origin are primarily involved in intra-organisational knowledge transfer with employees of German company locations. Due to their dual societal embeddedness and their profound language skills, highly skilled (re-)migrants are able to bridge the institutional distance between German and Turkish company locations. This is particularly important for the transfer of implicit knowledge, which is based on know-how and experience and is therefore difficult to transfer between different cultural and institutional contexts. In concrete terms, highly skilled (re-)migrants of Turkish origin facilitate cross-border knowledge transfers through three main activities: building knowledge networks, mediating frictions, transmitting knowledge. The results of a case study also show that highly skilled (re-)migrants can play a decisive role in the offshoring of knowledge intensive business services within global production networks Thereby, highly skilled (re-)migrants help to mitigate resistance and facilitate the dis- and re-embedding of knowledge within the offshoring process. Overall, this thesis contributes to the geographical (re-)migration research, to research on the geography of knowledge in MNEs, and to global production network research.

Die im Zentrum der Dissertation stehende Entwicklung eines strategischen Ansatzes zur Kombination von angebotsorientiertem Leerstands- bzw. Flächenmanagement mit nachfrageorientierten Standortplanungs- und -analyseinhalten des Handels zielt auf die Sicherung attraktiver und zukunftsfähiger Einzelhandelsstrukturen. Das Ergebnis stellt einen auf der Seite der Kommunen umzusetzenden gesamtstädtischen Informations-, Management- und Vermarktungsansatz dar, der die Einzelhandelsentwicklung der City-, Stadtteil- und Nebenlagen stützt und die wohnortnahe Grundversorgung sicherstellt. Die Basis des Strategischen Managementansatzes beruht auf der Kopplung von existierenden Ansätzen, Verfahren und Techniken mit den Ergebnissen von drei empirischen Analysen, in denen theoretisch erarbeitete Faktoren der Praxis gegenübergestellt und zusätzliche für die Ansatzerarbeitung und Umsetzung relevante Aspekte empirisch-theoriegeleitet erhoben worden sind. Aus den theoretischen und empirischen Vorarbeiten ist der Strategische Managementansatz anschließend in Form verschiedener, miteinander gekoppelter Bausteine zusammengestellt worden. Der erste Baustein besteht aus organisatorischen, institutionellen und verfahrensspezifischen Festsetzungen. Der zweite Baustein spiegelt Inhalte und Maßnahmen wider, über die der Erhalt bestehender und der Ausbau attraktiver Einzelhandelsstrukturen im Rahmen operativer Tätigkeiten sichergestellt werden soll. Der dritte Baustein stellt die Umsetzung dieses Leistungsspektrums mittels Geoinformationstechnologie dar. Die Dissertation schließt mit einer Überprüfung der Realisierbarkeit des theoretisch erarbeiteten Managementansatzes. Dazu ist eine beispielhafte Entwicklung einschließlich der Umsetzung des angestrebten Leistungs- bzw. Funktionsspektrums am Beispiel der niedersächsischen Gemeinde Bramsche durchgeführt worden.

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Die Untersuchung geht der Fragestellung nach, unter welchen Bedingungen sich auf regionaler Ebene die Innovationspotenziale von kleinen und mittleren Unternehmen (KMU) bestmöglich erschließen lassen. Der Theorieteil identifiziert hierfür zunächst drei wesentliche Bestimmungsgründe der regional unterschiedlichen Innovationstätigkeit und beschäftigt sich anschließend mit den wichtigsten regionalen Förderbereichen zur Steigerung der Innovationstätigkeit von KMU. Die Empirie untersucht die Innovationsförderpraxis anhand von zwei regionalen Fallstudien: die niedersächsische Region Weser-Ems und das ostdeutsche Bundesland Brandenburg. Es werden unterschiedliche Förderkonzeptionen zur Unterstützung der regionalen Innovationstätigkeit in den beiden Regionen analysiert. Eine sekundärstatistische Strukturanalyse überprüft hierzu zunächst die Charakteristika der beiden Untersuchungsregionen. Die zentralen empirischen Erkenntnisse werden durch die Auswertung von Experteninterviews mit regionalen Intermediären gewonnen. Dies ermöglicht ein tiefergehendes Verständnis der regionalen Förderpraxis. Als Ergebnis zeigt die Untersuchung Möglichkeiten zur Optimierung der regionalen Innovationsförderung auf und zielt darauf ab, die vorhandenen Einzelmaßnahmen zu einer integrierten Förderstrategie zusammenzuführen. Hierbei kommt es darauf an, Unterstützungsangebote für den gesamten Innovationsprozess vorzuhalten. Als Kernergebnisse formuliert die Untersuchung sechs Schlussfolgerungen für die Ausgestaltung erfolgreicher regionaler Innovationsförderung. Unter Berücksichtigung dieser Schlussfolgerungen werden regionalwirtschaftliche Implikationen zur Weiterentwicklung der regionalen Innovationsförderung aufgezeigt.

This cumulative dissertation presents an environmental economic geography approach to the study of waste and recycling. Thereby, it introduces the notion of ‘waste economies’, which describes the conjunction of the production of waste with the societal handling as well as the valorisation of waste. Two distinct regional case studies serve to illustrate different aspects of waste economies. The first case investigates the valorisation of surplus manure from intensive livestock farming through biogas production in a highly industrialized rural region in north-western Germany – the example of manure and digestate in the Oldenburger Münsterland. The second case focuses on the recovery and revalorisation of wasted materials in the labour-intensive urban informal economy of a metropolitan area in eastern India – the example of informal plastic recycling networks in Kolkata. On a theoretical level, the conceptualization of waste economies is located at the intersection of environmental economic geography and the interdisciplinary field of waste studies. It draws on the global production networks approach, social metabolism and Marxist political economy to analyse waste as a form of ‘hybrid’ socio-nature. Following a qualitative research methodology, the analysis of the two cases depicts the close entanglement of economic and environmental processes in the production, societal handling and economic valorisation of waste, and reveals how this intersection is conducive for capital accumulation. Three different economic processes and dynamics serve as central analytical dimensions to delineate the characteristics of waste economies with regard to the expanded reproduction of capital accumulation, that is, the continued growth of capitalist economies: processes of externalisation as well as dynamics of expansion and intensification. Through the combined up-scaled analysis of two empirical cases on a higher level of theoretical abstraction, this dissertation offers a better understanding of the economic function of waste in growth-oriented capitalist economies. In this way, it contributes to the global recycling network and global destruction network approaches within economic geography and relates them to scholarly concerns about global environmental change.