CONTINUOUSLY MONITORED BARRIER OPTIONS UNDER MARKOV PROCESSES

In this paper, we present an algorithm for pricing barrier options in one‐dimensional Markov models. The approach rests on the construction of an approximating continuous‐time Markov chain that closely follows the dynamics of the given Markov model. We illustrate the method by implementing it for a range of models, including a local Lévy process and a local volatility jump‐diffusion. We also provide a convergence proof and error estimates for this algorithm.     

House price risk and the hedging benefits of home ownership

Using a repeat-sales methodology, this paper finds that estimates of house price risk based on aggregate house price indices substantially underestimate the true size of house price risk. This is the result of the fact that aggregate house price indices average away the idiosyncratic volatility in house prices. Additional results show that the idiosyncratic risk exceeds the hedging benefits of home ownership. These results imply that for many home owners, owning a house may well add more price risk than it hedges away. These findings are based on a detailed dataset of individual housing transactions in the Netherlands.     

Tight LP-based lower bounds for wavelength conversion in optical networks

With the introduction of optical switching technology in telecommunication networks, all-optical connections, so-called lightpaths, can be established. Lightpaths have to be assigned a wavelength in such a way that no two lightpaths sharing a fiber use the same wavelength. The wavelength of operation can only be exchanged by the deployment of a wavelength converter. In this paper, we study the minimum converter wavelength assignment problem. We develop three integer programming formulations to minimize the number of converters and study their properties. Where the first two formulations lack the power to provide non-trivial lower bounds, tight lower bounds can be computed by solving the linear relaxation of the third formulation by delayed column generation. In fact, the lower bound equals the best known solution value for all realistic instances at our disposal. In a computational study, we compare different strategies to enhance the column generation algorithm.     

Nothing ventured,nothing gained! How and under which conditions employers provide employability-enhancing practices to their older workers

Employability-enhancing practices usually refer to training or courses, but also practices directed towards older workers to sustain their work capability can be embraced by this term. In the context of an ageing population and workforce, older workers' labour market participation gains an increasingly important role. Therefore, the importance of employability-enhancing practices is noted as a solution to sustain their employment. In this study, we focus on employer-provided employability practices for older workers. We answer the following research question: which practices do employers use to enhance their older workers' employability and under which conditions are these practices adopted. Analyses on Dutch corporate data (N = 860) show that employers mainly provide employability-enhancing practices that are easily implemented and not expensive. This finding replicates prior research and clarifies that job redesign should be considered as a possibility to keep older workers in the labour market. Furthermore, our study shows that both organizational and labour market characteristics affect employers' decisions whether to provide employability-enhancing practices for their older workers. This suggests that policy measures might be necessary to assimilate investments in employability-enhancing practices across organizations.     

Serial solidarity: the effects of experiences and expectations on the co-operative behaviour of employees

Two contrasting theoretical perspectives are frequently mentioned in discussions concerning the effects of temporary employment relationships on the co-operative behaviour of employees. According to the first perspective, temporary employees show less co-operative behaviour than permanent employees because they have a narrowly defined exchange relationship with the organization. The other approach holds that temporary employees are motivated to achieve a permanent contract and hence show more co-operative behaviour than permanent employees. In this paper, we argue that both theoretical approaches can be incorporated by focusing on the ‘temporal embeddedness’ of the relationships employees have with their co-workers. Temporal embeddedness refers to the experiences employees have had with co-workers in the past and the likelihood of future encounters with co-workers. We use two studies – a survey and a vignette study – to examine these temporal effects. The findings show that the co-operative behaviour of employees can indeed be explained by the temporal embeddedness of the relationships they have with their co-workers.     

Learning ahead of time: how evaluation of foresight may add to increased trust,organizational learning and future oriented policy and strategy

Evaluation of futures research (foresight) consists of three elements: quality, success, and impact of a study. Futures research ought to be methodologically and professionally sound, should to a certain extent be accurate, and should have a degree of impact on strategic decision making and policy-making. However, in the case of futures studies, the one does not automatically lead to the other. Quality of method does not ensure success, just as quality and success do not guarantee impact. This article explores the new paths for understanding evaluating of futures studies that are provided by the various articles in this special issue and sets out an agenda for next steps with regard to evaluation of futures research. The more structural and systematic evaluation can result in an increased level of trust in futures research, which may in turn lead to more future oriented strategy, policy and decision making. Therefore, evaluation should be seen as more than a burden of accountability – albeit important as accountability is – but as an investment in the credibility and impact of the profession. It may set in motion a cycle of mutual learning that will not only improve the capacity of futures-researchers but will also enhance the capacity and likeliness of decision-makers to apply insight from futures research.     

Life satisfaction and self-employment in different types of occupations

In this research, we investigate whether a positive relationship between life satisfaction and self-employment (versus paid employment) exists while simultaneously considering two occupational dimensions: white-collar versus blue-collar work and high-skilled versus low-skilled work. Using Eurobarometer data for a large number of European countries (2008–2012), our findings confirm that self-employed workers are more satisfied with their lives than paid employees are. A life satisfaction premium is also found when the self-employed and paid employees are compared within similar occupations in terms of collar type and skill level. Finally, self-employment can help to overcome low life satisfaction scores associated with blue-collar and low-skilled work.     

Urbanization and start-up rates in different geographies: Belgium,the Netherlands,and Sweden

This study addresses the mediating role of settlement patterns in the relationship between urbanization and start-up activity. Places do not operate in a vacuum and to understand the effect of “own” density on start-up patterns, we need to account for the urban spillovers or borrowed size that they may experience from other places nearby. The results can explain the empirical ambiguity in the relationship between urbanization and start-up patterns: the relationship between urbanization and start-up rates becomes more similar between countries when controlling for country-specific settlement patterns by including a spatially lagged urbanization variable and variables measuring the distance to urban centers. Accounting for the relative location of places and relevant sorting effects, we find that “own” density has a consistently negative effect on start-up activity. Yet, access to other places has a generally positive effect. This implies that nearby regions profit from the advantages offered by urban environments without having to deal with the costs involved.