Impetus and Switching

We thank the anonymous reviewers, Harald Biong, and Myles Shaver for their very helpful comments, Kim Vasant Nielsen for excellent research assistance, and Vibeke Henriksen for editorial assistance. Previous versions of this paper have been presented at the Academy of Management Annual Meeting, San Diego, August 1998, the 23rd EIBA Annual Conference, Stuttgart, December 1997, and in seminars at University of Vaasa, Swedish School of Economics, Norwegian School of Economics and Business Administration, Norwegian School of Management BI, and at the University of Melbourne. We thank participants at these meetings and seminars, in particular Ingmar Björkman, Andrew Delios, Carl Fey, Karin Fladmoe-Lindkvist, Mats Forsgren, Jean-Francois Hennart, Jan Johanson, Heli Korhonen, and Stephen Nicholas for their many comments and suggestions

Insights for International Strategic Management

Companies’ choice of foreign operation modes (FOM) has been a core subject of international business studies basically from its beginning (Hymer, 1960 [1976]; Root, 1964). A halfcentury of research has brought us a set of established perspectives on companies’ foreign operation mode choices; the most important being the economics based approaches of internalisation and transaction cost theories (Anderson and Gatignon, 1986; Buckley and Casson, 1976; Hennart, 1982), evolutionary and resource based approaches (Andersen, 1997; Kogut and Zander, 1993; Madhok, 1997), institutional approaches (Kostova and Zaheer, 1999; Meyer and Peng, 2005), and process models based on learning and decision behaviour theories (Johanson and Vahlne, 1977, 2009)...

A theoretical perspective

Internalisation theory informs us about why and when multinational enterprises (MNEs) internalise foreign operations, but has less to say about how the internalisation should be prepared and exercised when foreign market operations initially are carried out by local, outside agents. Drawing on insights from managerially-oriented literature, this paper explores the role of management in situations where the market transaction costs of using outside agents are negligible at market entry, but grow over time. A key question pertaining to this situation is: what management instruments may ensure persistent concurrence between changing pressure for internalisation in a foreign market and the effectuated internalisation of an MNE in that market? Management instruments and strategies that potentially support ‘staged internalisation’ include appropriation of the local outside agent’s financial assets (including equity) as well as non-financial assets in relation to user rights, customer relations, and value added activities

Limiting Carleman weights and anisotropic inverse problems

In this article we consider the anisotropic Calderon problem and related inverse problems. The approach is based on limiting Carleman weights, introduced in Kenig-Sjoestrand-Uhlmann (Ann. of Math. 2007) in the Euclidean case. We characterize those Riemannian manifolds which admit limiting Carleman weights, and give a complex geometrical optics construction for a class of such manifolds. This is used to prove uniqueness results for anisotropic inverse problems, via the attenuated geodesic X-ray transform. Earlier results in dimension $n \geq 3$ were restricted to real-analytic metrics.Comment: 58 page

Optimal designs for rational function regression

We consider optimal non-sequential designs for a large class of (linear and nonlinear) regression models involving polynomials and rational functions with heteroscedastic noise also given by a polynomial or rational weight function. The proposed method treats D-, E-, A-, and $\Phi_p$-optimal designs in a unified manner, and generates a polynomial whose zeros are the support points of the optimal approximate design, generalizing a number of previously known results of the same flavor. The method is based on a mathematical optimization model that can incorporate various criteria of optimality and can be solved efficiently by well established numerical optimization methods. In contrast to previous optimization-based methods proposed for similar design problems, it also has theoretical guarantee of its algorithmic efficiency; in fact, the running times of all numerical examples considered in the paper are negligible. The stability of the method is demonstrated in an example involving high degree polynomials. After discussing linear models, applications for finding locally optimal designs for nonlinear regression models involving rational functions are presented, then extensions to robust regression designs, and trigonometric regression are shown. As a corollary, an upper bound on the size of the support set of the minimally-supported optimal designs is also found. The method is of considerable practical importance, with the potential for instance to impact design software development. Further study of the optimality conditions of the main optimization model might also yield new theoretical insights.Comment: 25 pages. Previous version updated with more details in the theory and additional example

Abuse-related post-traumatic stress during the childbearing year

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75405/1/j.1365-2648.2004.03051.x.pd

Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy

We review HB stars in a broad astrophysical context, including both variable and non-variable stars. A reassessment of the Oosterhoff dichotomy is presented, which provides unprecedented detail regarding its origin and systematics. We show that the Oosterhoff dichotomy and the distribution of globular clusters (GCs) in the HB morphology-metallicity plane both exclude, with high statistical significance, the possibility that the Galactic halo may have formed from the accretion of dwarf galaxies resembling present-day Milky Way satellites such as Fornax, Sagittarius, and the LMC. A rediscussion of the second-parameter problem is presented. A technique is proposed to estimate the HB types of extragalactic GCs on the basis of integrated far-UV photometry. The relationship between the absolute V magnitude of the HB at the RR Lyrae level and metallicity, as obtained on the basis of trigonometric parallax measurements for the star RR Lyrae, is also revisited, giving a distance modulus to the LMC of (m-M)_0 = 18.44+/-0.11. RR Lyrae period change rates are studied. Finally, the conductive opacities used in evolutionary calculations of low-mass stars are investigated. [ABRIDGED]Comment: 56 pages, 22 figures. Invited review, to appear in Astrophysics and Space Scienc

Measurement of the Atmospheric Muon Spectrum from 20 to 3000 GeV

The absolute muon flux between 20 GeV and 3000 GeV is measured with the L3 magnetic muon spectrometer for zenith angles ranging from 0 degree to 58 degree. Due to the large exposure of about 150 m2 sr d, and the excellent momentum resolution of the L3 muon chambers, a precision of 2.3 % at 150 GeV in the vertical direction is achieved. The ratio of positive to negative muons is studied between 20 GeV and 500 GeV, and the average vertical muon charge ratio is found to be 1.285 +- 0.003 (stat.) +- 0.019 (syst.).Comment: Total 32 pages, 9Figure