29,141 research outputs found
Connected innovation: an international comparative study that identifies mixed modes of innovation
This paper offers a new angle on innovation modalities by adopting a recently emerging approach towards identifying innovation typologies via exploratory data analysis techniques with the aim to tease out some underlying latent variables that represent coherent innovation strategies for groups of firms. Mixed modes of innovation include aspects of both user and open innovation, and are employed to inform on such concepts. The modes of innovation are developed by exploring micro-level innovation survey data across 18 countries. The contributions of the paper lie in (a) the identification of five core innovation modes that are found in almost all countries; and (b) examining – via regression analysis – the role of different modes in firm performance
Price-setting behavior in the presence of social interactions
We argue in this paper that a more active market for corporate control may weaken the takeover threat. We show that an increase in the number of potential raiders tends to decrease the probability of a takeover. This in turn weakens managerial incentives. The lower managerial effort level that results in equilibrium negatively affects the ex ante value of the firm.
Calibrations, Monopoles and Fuzzy Funnels
We present new non-Abelian solitonic configurations in the low energy
effective theory describing a collection of N parallel D1--branes. These
configurations preserve 1/4, 1/8, 1/16 and 1/32 of the spacetime supersymmetry.
They are solutions to a set of generalised Nahm's equations which are related
to self-duality equations in eight dimensions. Our solutions represent
D1--branes which expand into fuzzy funnel configurations ending on collections
of intersecting D3--branes. Supersymmetry dictates that such intersecting
D3--branes must lie on a calibrated three-surface of spacetime and we argue
that the generalised Nahm's equations encode the data for the construction of
magnetic monopoles on the relevant three-surfaces.Comment: 19 pages. Latex. v2: added references and acknowledgmen
Crossed conductance in FSF double junctions: role of out-of-equilibrium populations
We discuss a model of Ferromagnet / Superconductor / Ferromagnet (FSF) double
junction in which the quasiparticles are not in equilibrium with the condensate
in a region of the superconductor containing the two FS contacts. The role of
geometry is discussed, as well as the role of a small residual density of
states within the superconducting gap, that allows a sequential tunneling
crossed current. With elastic quasiparticle transport and the geometry with
lateral contacts, the crossed conductances in the sequential tunneling channel
are almost equal in the normal and superconducting phases, if the distance
between the FS interfaces is sufficiently small. The sequential tunneling and
spatially separated processes (the so-called crossed Andreev reflection and
elastic cotunneling processes) lead to different signs of the crossed current
in the antiparallel alignment for tunnel interfaces.Comment: 8 pages, 4 figure
Price-setting behavior in the presence of social interactions
We argue in this paper that a more active market for corporate control may weaken the takeover threat. We show that an increase in the number of potential raiders tends to decrease the probability of a takeover. This in turn weakens managerial incentives. The lower managerial effort level that results in equilibrium negatively affects the ex ante value of the firm.
Entanglement in quantum catastrophes
We classify entanglement singularities for various two-mode bosonic systems
in terms of catastrophe theory. Employing an abstract phase-space
representation, we obtain exact results in limiting cases for the entropy in
cusp, butterfly, and two-dimensional catastrophes. We furthermore use numerical
results to extract the scaling of the entropy with the non-linearity parameter,
and discuss the role of mixing entropies in more complex systems.Comment: 7 pages, 3 figure
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