Construction of Global Solutions to the Linearized Field Equations for Causal Variational Principles

We give a novel construction of global solutions to the linearized field equations for causal variational principles. The method is to glue together local solutions supported in lens-shaped regions. As applications, causal Green's operators and cone structures are introduced.Comment: 19 pages, LaTeX, 3 figures, smaller improvements (published version

Curvature Estimates in Asymptotically Flat Lorentzian Manifolds

We consider an asymptotically flat Lorentzian manifold of dimension (1,3). An inequality is derived which bounds the Riemannian curvature tensor in terms of the ADM energy in the general case with second fundamental form. The inequality quantifies in which sense the Lorentzian manifold becomes flat in the limit when the ADM energy tends to zero.Comment: 15 pages (published version

The Theoretical Embedding Of Born Globals: Challenging Existing Internationalization Theories

This article examines the embedding of the phenomenon of Born Globals into three existing theories of the firm. The model of Born Globals deals with young companies that begin shortly after their foundation to internationalize. The Uppsala Internationalization Model helps to delimit the concept of Born Globals from existing internationalization models and to highlight their special features. The resource-based view takes up the integration of knowledge as the key resource of Born Globals and explains the underlying mechanism with which a company achieves a sustainable competitive advantage from a bundle of resources. The knowledge-based view is concerned with the generation of knowledge and explains the learning processes that are performed by the entrepreneur. A recurring theme could be identified and contains the following elements which interconnect the three theories of the firm with the concept of Born Globals - knowledge as a key resource, learning, and integration of knowledge into organizations

Drivers of internationalization success:a conjoint choice experiment on German SME managers

Internationalization is a common growth strategy for small and medium-sized enterprises (SMEs). However, SMEs face several challenges within the internationalization process. As SMEs are characterized by limited resources, managers are constantly involved in a decision-making process concerning the allocation of the SMEs' resources. Therefore, internationalization can be understood as a complex, multidimensional decision process. Based on a set of 2244 internationalization decisions made by German SME managers, the present study examines how eight strategic and structural factors drive the perceived international success of SMEs. When applying conjoint choice analysis, the results suggest that especially equity financing in the internationalization process, an appropriate market selection as well as proactive motives, and a long-term scope can drive SMEs' international success. Moreover, it becomes evident that strategic factors are more relevant for successful internationalization than structural factors

How Does De‐Globalization affect location decisions? A Study of managerial perceptions of risk and return

Our understanding of how managers take international location decisions is still scarce. Building on the microfoundations view, we explore managers’ perceptions of risk and return in a discrete choice experiment with 2,618 decisions in 2013 (a globalizing world) and 2017 (a de‐globalizing world). While managerial perceptions vary over time due to economic and political changes, such as the current de‐globalization trend, decision heuristics remain remarkably stable: locations perceived as least risky offer the highest expected returns. We also find that distance is a good proxy for managerial perceptions. Investigating the microfoundations of decision‐making we show that international experience, risk‐taking propensity and shareholder status affect heuristics. In sum, our study provides novel insights into the microfoundations of location decisions and extends the behavioral perspective on internationalization

Europium cyclooctatetraene nanowire carpets: A low-dimensional, organometallic, and ferromagnetic insulator

We investigate the magnetic and electronic properties of europium cyclooctatetraene (EuCot) nanowires by means of low-temperature X-ray magnetic circular dichroism (XMCD) and scanning tunneling microscopy (STM) and spectroscopy (STS). The EuCot nanowires are prepared in situ on a graphene surface. STS measurements identify EuCot as an insulator with a minority band gap of 2.3 eV. By means of Eu M5,4 edge XMCD, orbital and spin magnetic moments of (−0.1 ± 0.3)μB and (+7.0 ± 0.6)μB, respectively, were determined. Field-dependent measurements of the XMCD signal at the Eu M5 edge show hysteresis for grazing X-ray incidence at 5 K, thus confirming EuCot as a ferromagnetic material. Our density functional theory calculations reproduce the experimentally observed minority band gap. Modeling the experimental results theoretically, we find that the effective interatomic exchange interaction between Eu atoms is on the order of millielectronvolts, that magnetocrystalline anisotropy energy is roughly half as big, and that dipolar energy is approximately ten times lower