Mergers and Business Model Assimilation: Evidence from Low-Cost Airlines Takeovers

This paper examines mergers that lead to an almost immediate replacement of the target firm’s business model in favor of that of the acquiring firm. We examine the post-merger behavior of the two leading European dedicated low-cost airlines, EasyJet and Ryanair, each acquiring another low-cost airline, respectively Go Fly and Buzz. We find that both takeovers had an immediate and sustained impact on both the pricing structures and the extent of inter-temporal price schedules used on the acquired routes, with early booking fares noticeably reduced and only very late booking fares increased. The analysis suggests that the takeovers had a net beneficial effect as a consequence of the introduction of the acquiring firms’ business models and associated yield management pricing systems. .merger policy; Business model; Low-cost airline; Price discrimination; Yield management .

Collisionless hydrodynamics for 1D motion of inhomogeneous degenerate electron gases: equivalence of two recent descriptions

Recently I. Tokatly and O. Pankratov (''TP'', Phys. Rev. B 60, 15550 (1999)) used velocity moments of a semiclassical kinetic equation to derive a hydrodynamic description of electron motion in a degenerate electron gas. Independently, the present authors (Theochem 501-502, 327 (2000)) used considerations arising from the Harmonic Potential Theorem (Phys. Rev. Lett. 73, 2244 (1994)) to generate a new form of high-frequency hydrodynamics for inhomogeneous degenerate electron gases (HPT-N3 hydrodynamics). We show here that TP hydrodynamics yields HPT-N3 hydrodynamics when linearized about a Thomas-Fermi groundstate with one-dimensional spatial inhomnogeneity.Comment: 17p

Governing Human Interactions with Migratory Animals, with a Focus on Humans Interacting with Fish in Lake Erie: Then, Now, and in the Future

Lake Erie fisherie

Correlation energies of inhomogeneous many-electron systems

We generalize the uniform-gas correlation energy formalism of Singwi, Tosi, Land and Sjolander to the case of an arbitrary inhomogeneous many-particle system. For jellium slabs of finite thickness with a self-consistent LDA groundstate Kohn-Sham potential as input, our numerical results for the correlation energy agree well with diffusion Monte Carlo results. For a helium atom we also obtain a good correlation energy.Comment: 4 pages,1 figur

Options for the ATLAS Level 2 Trigger

The high rate of interactions in future LHC experiments places stringent demands on the trigger and data acquisition systems. The first-level trigger for the ATLAS experiment is based on special-purpose processors designed to reduce the trigger rate from the 40 MHz beam-crossing rate to below 100 kHz. Higher-level triggers are required to reduce the data flow to about 100 MB/s (100 Hz with full data) for permanent storage. Processing for the second-level trigger uses data from regions of interest (RoIs) defined by the first-level trigger, whereas full event data (about 1 MB per event) is used at Level-3. The present paper presents options for the ATLAS Level-2 trigger

Exchange and Correlation Kernels at the Resonance Frequency -- Implications for Excitation Energies in Density-Functional Theory

Specific matrix elements of exchange and correlation kernels in time-dependent density-functional theory are computed. The knowledge of these matrix elements not only constraints approximate time-dependent functionals, but also allows to link different practical approaches to excited states, either based on density-functional theory, or on many-body perturbation theory, despite the approximations that have been performed to derive them.Comment: Submitted to Phys. Rev. Lett. (February 4, 1999). Other related publications can be found at http://www.fhi-berlin.mpg.de/th/paper.htm

A longitudinal study of the bi-directional relationship between tobacco smoking and psychological distress in a community sample of young Australian women

Background. Tobacco smoking and poor mental health are both prevalent and detrimental health problems in young women. The temporal relationship between the two variables is unclear. We investigated the prospective bidirectional relationship between smoking and mental health over 13 years

Multipole strength function of deformed superfluid nuclei made easy

We present an efficient method for calculating strength functions using the finite amplitude method (FAM) for deformed superfluid heavy nuclei within the framework of the nuclear density functional theory. We demonstrate that FAM reproduces strength functions obtained with the fully self-consistent quasi-particle random-phase approximation (QRPA) at a fraction of computational cost. As a demonstration, we compute the isoscalar and isovector monopole strength for strongly deformed configurations in $^{240}$Pu by considering huge quasi-particle QRPA spaces. Our approach to FAM, based on Broyden's iterative procedure, opens the possibility for large-scale calculations of strength distributions in well-bound and weakly bound nuclei across the nuclear landscape.Comment: 5 pages, 3 figure