51,180 research outputs found
Social identity and competitiveness
Recent experimental results indicate that women do not like competitive environments as much as men do. Another literature is interested in the effect of social identity on economic behaviors. This paper investigates in the lab the impact of social identity on men and women's willingness to compete both individually and as part of a team. To this aim, participants from the Identity sessions had to go through group identity building activities in the lab while participants from the Benchmark sessions did not. The main result is that men are only willing to enter a team competition with a teammate of unknown ability if they share a common group identity with him or her. This change of behavior seems to be caused by high-performing men who are less reluctant to be matched with a possibly less able participant when he or she belongs to his group. On the other hand, group identity does not seem to induce women to take actions more in the interest of the group they belong to. --Social Identity,Gender Effects,Tournament,Teams
The French research system : which evolution and which borders ?
We analyse the French Research System with the study of the contracts between the CNRS (Centre National de la Recherche Scientifique) and the companies and test the hypothesis of small world in science. Our working material is the data base of the contracts of the units of the CNRS with economic partners, which has been collecting information since 1986 to 2006. This first application of Network methods and tools to the CNRS contracts allows us to obtain some results: at first, the major firmsâs scientific network is not "scale-free" as if competition and strategy between the most large firms dominate the behaviour in R&D investments and management of contracts with public research units. However, in second part, we demonstrate that every discipline network is a "small world", i.e. , that it exists several scientific communities in which the diffusion of information is free and easy, even if its forwards through any actors (some labs or some firms). Probably, there are several "small worlds" in this database as in the scientific collaboration networks. Is seems that the industrial research does not disturb too much the properties of scientific network, as itâs well known in the literature of Sciences Studies
Embedding Riemann surfaces with isolated punctures into the complex plane
We enlarge the class of open Riemann surfaces known to be holomorphically
embeddable into the plane by allowing them to have additional isolated
punctures compared to the known embedding results
On the closure of the tame automorphism group of affine three-space
We provide explicit families of tame automorphisms of the complex affine
three-space which degenerate to wild automorphisms. This shows that the tame
subgroup of the group of polynomial automorphisms of \C^3 is not closed, when
the latter is seen as an infinite dimensional algebraic group.tomorphism group
of affine three-spac
Online Sequential Monte Carlo smoother for partially observed stochastic differential equations
This paper introduces a new algorithm to approximate smoothed additive
functionals for partially observed stochastic differential equations. This
method relies on a recent procedure which allows to compute such approximations
online, i.e. as the observations are received, and with a computational
complexity growing linearly with the number of Monte Carlo samples. This online
smoother cannot be used directly in the case of partially observed stochastic
differential equations since the transition density of the latent data is
usually unknown. We prove that a similar algorithm may still be defined for
partially observed continuous processes by replacing this unknown quantity by
an unbiased estimator obtained for instance using general Poisson estimators.
We prove that this estimator is consistent and its performance are illustrated
using data from two models
Affine-ruled varieties without the Laurent cancellation property
We describe a method to construct hypersurfaces of the complex affine
-space with isomorphic -cylinders. Among these hypersurfaces,
we find new explicit counterexamples to the Laurent Cancellation Problem, i.e.
hypersurfaces that are non isomorphic, although their -cylinders
are isomorphic as abstract algebraic varieties. We also provide examples of non
isomorphic varieties and with isomorphic cartesian squares
and
Artistic Identities and Professional Strategies : Francophone Musicians in France and Britain
Funding This work was supported by Arts and Humanities Research Council [grant number AH/E508628/1] and European Commission [grant number HPSE-CT-2002-00133].Peer reviewedPostprin
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