Search Unemployment and New Economic Geography

This paper develops a general equilibrium geographical economics model which uses matching frictions on the labor market to generate regional unemployment disparities alongside the usual core-periphery pattern of industrial agglomeration. In the model, regional wage differentials do not only influence migration decisions of mobile workers, but also affect the bargaining process on local labor markets, leading to differences in vacancies and unemployment as well. In a setting with two regions, both higher or lower unemployment rates in the core region are possible equilibrium outcomes, depending on transport costs and the elasticity of substitution. Stylized facts suggest that both patterns are of empirical relevance.Regional labor markets; New Economic Geography; job matching; unemployment

The C-Numerical Range in Infinite Dimensions

In infinite dimensions and on the level of trace-class operators $C$ rather than matrices, we show that the closure of the $C$-numerical range $W_C(T)$ is always star-shaped with respect to the set $\operatorname{tr}(C)W_e(T)$, where $W_e(T)$ denotes the essential numerical range of the bounded operator $T$. Moreover, the closure of $W_C(T)$ is convex if either $C$ is normal with collinear eigenvalues or if $T$ is essentially self-adjoint. In the case of compact normal operators, the $C$-spectrum of $T$ is a subset of the $C$-numerical range, which itself is a subset of the convex hull of the closure of the $C$-spectrum. This convex hull coincides with the closure of the $C$-numerical range if, in addition, the eigenvalues of $C$ or $T$ are collinear.Comment: 31 pages, no figures; to appear in Linear and Multilinear Algebr

Integrating content-based language learning and intercultural learning online: An international eGrops collaboration

Learning language through content in the tertiary context presents a challenge in that language teachers, particularly in EAP/ESP contexts, are not necessarily experts in their students’ speciality subject areas, while subject experts might lack language teaching methodology. Furthermore, intercultural awareness, a key qualification in today’s global work environment, tends to take a back seat in a content-based approach. This paper reports on a didactic concept which integrates subject-based language learning with intercultural experience through online collaboration in an international eGroups set-up. The creation of a collaborative learning space aimed to bring together learners from different cultural contexts (New Zealand and Germany) and with different target languages (German and English) towards shared learning outcomes. Data from student interactions will help illustrate to what extent the eGroups model promoted interactive, communicative and intercultural competence through content-related bilingual collaboration

Value-oriented process modeling - towards a financial perspective on business process redesign

To date, typical process modeling approaches put a strong emphasis on describing behavioral aspects of business operations. However, they often neglect value-related information. Yet, such information is of key importance to strategic decisionmaking, for instance in the context of process improvement or business engineering. In this paper we propose a valueoriented approach to business process modeling based on key concepts and metrics from operations and financial management. A simple case study suggests that our approach facilitates managerial decision-making in the context of process re-design

CMB and matter power spectra with non-linear dark-sector interactions

An interaction between dark matter and dark energy, proportional to the product of their energy densities, results in a scaling behavior of the ratio of these densities with respect to the scale factor of the Robertson-Walker metric. This gives rise to a class of cosmological models which deviate from the standard model in an analytically tractable way. In particular, it becomes possible to quantify the role of potential dark-energy perturbations. We investigate the impact of this interaction on the structure formation process. Using the (modified) CAMB code we obtain the CMB spectrum as well as the linear matter power spectrum. It is shown that the strong degeneracy in the parameter space present in the background analysis is considerably reduced by considering \textit{Planck} data. Our analysis is compatible with the $\Lambda$CDM model at the $2\sigma$ confidence level with a slightly preferred direction of the energy flow from dark matter to dark energy.Comment: 22 pages, 8 figures, analysis enlarged, comments and references added, accepted for publication in JCA

Ueber die Fortpflanzung der Diplopoden (Chilognathen)

Während über die Entwickelungsgeschichte der Crustaceen und Insecten schon eine ansehnliche Literatur vorhanden ist und beständig nene Arbeiten erscheinen, haben sich nur sehr wenige Autoren (vorzüglich NEWPORT, METSCHNIKOW und in letzter Zeit HEATHCOTE) mit der Embryologie der Myriapoden beschäftigt. Diese relative Vernachlässigung dürfte zum Theil in der ungenügenden Kenntniss der Biologie der Tausendfüssler eine Erklärung finden, da ohne genaiie Eenntniss der Lebensgewohnheiten dieser Thiere zur Zeit der Fortpflanzung die Beschaffung der Eier (und vor allem der frisch befruchteten) so gut wie unmöglich ist. Manche der diesbezüglichen Angaben der Literatur sind ungenau oder geradezu falsch, und viele richtige und schätzenswerthe Angaben älterer Autoren, von denen ich STEIN, NEWPORT, GERVAIS und besonders FABRE hervorheben will, sind nahezu in Vergessenheit gerathen. Der Zweck dieser Arbeit geht dahin, eine zusammenhängende Reihe von eigenen sorgfältigen Untersuchungen über die Biologie,insbesondere die Fortpflanzung der einheimischen Diplopoden bekannt zu geben. Dem biologischen Theil will ich eine kurze allgemeine anatomische Beschreibung des Geschlechtsapparates der Diplopoden voranschicken, und bei der Besprechung der einzelnen Familien werde ich auf den Bau des Geschlechtsapparates etwas näher eingehen. ..

A systematic literature review of the use of social media for business process management

In today’s expansion of new technologies, innovation is found necessary for organizations to be up to date with the latest management trends. Although organizations are increasingly using new technologies, opportunities still exist to achieve the nowadays essential omnichannel management strategy. More precisely, social media are opening a path for benefiting more from an organization’s process orientation. However, social media strategies are still an under-investigated field, especially when it comes to the research of social media use for the management and improvement of business processes or the internal way of working in organizations. By classifying a variety of articles, this study explores the evolution of social media implementation within the BPM discipline. We also provide avenues for future research and strategic implications for practitioners to use social media more comprehensively