Duality theory for robust utility maximisation

In this paper, we present a duality theory for the robust utility maximisation problem in continuous time for utility functions defined on the positive real line. Our results are inspired by – and can be seen as the robust analogues of – the seminal work of Kramkov and Schachermayer (Ann. Appl. Probab. 9:904–950, 1999). Namely, we show that if the set of attainable trading outcomes and the set of pricing measures satisfy a bipolar relation, then the utility maximisation problem is in duality with a conjugate problem. We further discuss the existence of optimal trading strategies. In particular, our general results include the case of logarithmic and power utility, and they apply to drift and volatility uncertainty.

     

Going abroad to play: Motivations,challenges, and support of sports expatriates

Professional athletes moving abroad for their career is a novel phenomenon in international human resource management (IHRM). This exploratory article charts the motivations of sports expatriates to move abroad to play, as well as adjustment challenges and sources of support. A survey was conducted with 77 professional athletes in 10 different sports. The main motivations to move abroad were interest to experience life abroad, followed by the search for new challenges. In terms of challenges, different coaching style and communication issues were most often mentioned. Support was mainly informal, through team mates rather than professional providers. Our article contributes to the literature because it is one of the first studies focusing on sports expatriates from an international HR perspective. Our study provides information on a vulnerable group of expatriates; they are young in age and under extreme performance pressure. Sports expatriates need all the support they can get, and yet, little professional support is offered.     

Reconciling Alternative Theories for the Safety of Owner–Operators

Motor carrier safety is an important concern of shippers, carriers, policy makers, consignees, insurance providers, and the motoring public. One aspect of carrier safety that has garnered substantial attention is whether carriers making greater use of owner–operators are more or less safe vis‐à‐vis carriers making greater use of employee drivers. Currently, conflicting theoretical predictions exist regarding the direction of this relationship. In this article, we offer a reconciliation of the alternative theoretical predictions by developing a coherent theory that merges sociological rational choice theory and theory regarding motor carrier safety. We subject our theory to empirical testing by fitting a series of seemingly unrelated regression models to a vector of safety measures tracked as part of the Federal Motor Carrier Safety Administration's Compliance, Safety, and Accountability program. Our results are consistent with our proposed theory of owner—operator safety and provide meaningful theoretical and managerial implications and directions for future research.     

Bargained Equality: The Strengths and Weaknesses of Workplace Gender Equality Agreements and Plans in France

‘Bargained equality’ reflects wider characteristics of French employment relations whereby state‐driven collective bargaining is a major mode of regulation but is based on weak workplace bargaining cultures outside the largest firms. This article focuses on duties on French employers to bargain on gender equality. It presents findings of a project evaluating workplace agreements and plans on gender equality, based on a sample of 186 agreements submitted in 2014–2015, in 10 sectors, and in‐depth interviews in 20 companies. Despite a rise in formal compliance due to stronger enforcement since 2012, our analysis shows that most companies submitting plans or agreements do not systematically address quantitative measurement of pay or other gender gaps. As well as sectoral differences, the analysis also identifies ‘generational effects’: processes of change which occur as collective agreements expire and are replaced are dependent on local dynamics of bargaining. Based on this analysis, we argue that attention should be paid to the resources available to local bargaining actors, in order to promote an equality agenda.     

School foodservice employees’ beliefs about local produce use at work and home

Sustainability practices are becoming an essential part of foodservice businesses. Schools often purchase local produce and use it in school meals as part of their sustainability efforts. School foodservice employees play an important role in the effectuation of these efforts and understanding their perceptions is important. A questionnaire was used to assess foodservice employees’ beliefs regarding the quality and benefits of local produce use in schools. Results indicate differences in employees’ perceptions regarding benefits and quality of local produce based on their perception of the importance of purchasing local produce for home use.     

Complementors as connectors: managing open innovation around digital product platforms

In the digital age, open innovation is increasingly organized around platform ecosystems. This paper investigates how firms can coordinate open innovation as a platform strategy for the development of complementary products by independent third parties. We draw on a qualitative case study of Philips Hue – a connected lighting platform for consumers with its variety of complementary products. We identify three increasingly complex ways in which independent complements connect to a focal platform. Our findings show that managing these connections requires a hybrid open innovation approach that combines arm’s length coordination, with a large number of complementors through open interfaces, and intensive bilateral collaboration, with a selected number of partners. Our findings demonstrate that complex interconnections across digital platforms and products lead to the management challenge of navigating an ‘ecology of platforms’, which warrants future research.     

Anticipating independence,no premonition of partition. The lessons of bank branch expansion on the Indian subcontinent, 1939 to 1946

We examine investment in bank branches on the Indian subcontinent in 1939 and 1946. In 1947, the states of India and Pakistan were created from the erstwhile colony of British India. Partition was destabilizing to both economies. We use branch expansion as a proxy for entrepreneur's pre‐partition predictions of the future of these regions. Our results indicate there were no premonitions of economic dislocation. Banks tended to deepen their presence in regions which were already developed. But controlling for the level of 1931 development, branch placement was highest in exactly those regions, Bengal and the Punjab, which were to experience the greatest negative consequences from political division. After 1947, multiple banks failed; most failing banks were registered in the Punjab or Bengal region. In United India, businessmen saw as much promise in regions which were to become Pakistan as in regions which were to become India. After partition, the Pakistan regions were immediately more economically fragile. This event provides a general lesson. Economic integration had intensified over the years of British rule. The abrupt stop to integration harmed especially the smaller, less diversified region. Politicians should be wary of politically dividing regions which have evolved to function as integrated economic units.     

Attracting Long‐Term Shareholders

Corporate CEOs often say they don't hear enough from shareholders about strategic issues related to long‐term value creation. At the same time, they claim to hear with predictable regularity from short‐term investors about their success (or failure) in hitting consensus earnings targets. But as the authors of this article begin by noting, there is mounting evidence that companies get the shareholders they deserve—that companies that provide quarterly earnings guidance and otherwise focus investor attention on near‐term earnings targets tend to attract more transient investors. The authors go on to argue that companies with a compelling long‐term vision can expect to benefit not only from more farsighted managerial decision‐making, but also from building a base of longer‐term investors who share management's view of success, and how it can and ought to be achieved. Such a shift in strategic focus and disclosure toward longer‐run performance creates a virtuous cycle—one in which companies that gain the interest and backing of investors with longer horizons end up reinforcing management's confidence to undertake value‐adding investments in their company's future. Even if most companies can't pick their shareholders, they can develop an investor engagement strategy designed to attract long‐term investors. In this article, the chairman and president of FCLTGlobal outline the underlying strategy behind long‐term investor relations and the four key components of such an approach.     

Perceptions of Power Within a Membership-based Seniors' Community Center

As opportunities for citizenship diminish in everyday life amid increasing consumption and privatization, there is a growing realization of the importance of participation and citizen power, particularly for older adults. Gaventa's (1980) Gaventa, J. (1980). Power and powerlessness: Quiescence and rebellion in an Appalachian Valley. Urbana, IL: University of Illinois Press. [Google Scholar] concepts of visible, invisible, and hidden power and Arnstein's ladder of citizen power (1969) framed this study, which used participatory methods, including creation and facilitation of a members' group at a small seniors' center, to address the question: What are the factors that undermine or cultivate citizen power at a small community center for seniors? The data were organized under three power-related themes: powerlessness, reluctance to claim power, and claiming power. Findings suggest that negative social constructions associated with aging act as instruments of invisible power. Further, community center membership, to be considered meaningful, should be imbued with visible power, so that seniors can be involved in decision making and leadership.     

An evaluation of ecotourism in Amazonas, Brazil

Registered “ecotour” lodges were studied using observation and interviews with visitors, employees, and local people. Findings were evaluated using proposed ecotourism principles. Besides providing employment, lodges improve access, stimulate new services (health utilities, etc.), and make valued but limited local purchases. In other ways, lodges fall short of the ideals inherent in the principles. They contribute little to conservation education, resource protection, or the involvement and empowerment of local people. Tourists wish to see and would support conservation and community development programs both financially and via their future selection of ecotour operators. Numerous implications for concessions, protected area management, and rural development in Amazonas are discussed.