1,552 research outputs found
Some forgotten equilibria of the Bertrand duopoly!?
No full textThis note analyzes the Bertrand duopoly with constant but asymmetric marginal costs on a market with homogenous products. It is shown that there exist some equilibria that are ignored in the literature on IO. In addition, in this setting (perfectly or nearly perfectly) competitive equilibria exist.
Predicting the results of the REF using departmental h-index: A look at biology, chemistry, physics, and sociology.
No full textCan metrics be used instead of peer review for REF-type assessments? With the stakes so high, any replacement would have to be extremely accurate. Olesya Mryglod, Ralph Kenna, Yurij Holovatch and Bertrand Berche looked at two metric candidates, including the departmental h-index, and four subject areas: biology, chemistry, physics and sociology. The correlations are significant, but comparisons with RAE indicate that while the departmental h-index is the best metric, it would not have been good enough to replace the peer review exercise. A more important question is whether we should seek to measure research quality using metrics at all
Heterogeneous Behavioral Rules in the Oligopolistic Case
No full textIn a static symmetric duopoly the set of behavioral rules is extended to different types of markup pricing. Using an equilibrium concept suggested in Pasche (2001), it is shown that dependend on the markup neither pure Cournot nor pure Bertrand behavior is a behavioral equilibrium profile. Instead, there is a rationale for the usage of simple heuristics. The presence of markup rules leads to Stackelberg outcomes. Furthermore, pure markup behavior is more competitive than in Cournot case but less competitive than in Bertrand case. It is shown, that multiple behavioral equilibria and heterogeneous behavior may arise, where at least one player uses price setting strategies.oligopoly, markup rules, heterogeneity, behavioral equilibrium.
Bertrand Berche's 50th birthday
No full textA story from scientific folklore mentions two principal types of scientists. Scientists of the first type follow a ballistic approach in their research: they go far in a chosen direction, but the area they cover is negligibly small. Scientists of the second type follow a diffusive approach: they try to look in different directions covering a broad area but they go nowhere. Fortunately, such categorizations have exceptions. Indeed, amongst our colleagues there are those who manage to go far in their studies, searching answers to different puzzles put by nature, no matter to which specific sub-field of physics these puzzles are traditionally attributed. Bertrand Berche, who this year celebrates his first jubilee is one of them. Statistical physics, conformal field theory, gauge fields in condensed matter physics, cosmology, complex networks, sociophysics, history and philosophy of physics, these are the fields in which he works. At this point on behalf of his friends, colleagues and the community at large, it is appropriate to celebrate Bertrand Berche’s jubilee and to wish him continued success on his way
Bertrand Berche's 50th birthday
No full textA story from scientific folklore mentions two principal types of scientists. Scientists of the first type follow a ballistic approach in their research: they go far in a chosen direction, but the area they cover is negligibly small. Scientists of the second type follow a diffusive approach: they try to look in different directions covering a broad area but they go nowhere. Fortunately, such categorizations have exceptions. Indeed, amongst our colleagues there are those who manage to go far in their studies, searching answers to different puzzles put by nature, no matter to which specific sub-field of physics these puzzles are traditionally attributed. Bertrand Berche, who this year celebrates his first jubilee is one of them. Statistical physics, conformal field theory, gauge fields in condensed matter physics, cosmology, complex networks, sociophysics, history and philosophy of physics, these are the fields in which he works.
At this point on behalf of his friends, colleagues and the community at large, it is appropriate to celebrate Bertrand Berche’s jubilee and to wish him continued success on his way
Bertrand Berche's 50th birthday
No full textA story from scientific folklore mentions two principal types of scientists. Scientists of the first type follow a ballistic approach in their research: they go far in a chosen direction, but the area they cover is negligibly small. Scientists of the second type follow a diffusive approach: they try to look in different directions covering a broad area but they go nowhere. Fortunately, such categorizations have exceptions. Indeed, amongst our colleagues there are those who manage to go far in their studies, searching answers to different puzzles put by nature, no matter to which specific sub-field of physics these puzzles are traditionally attributed. Bertrand Berche, who this year celebrates his first jubilee is one of them. Statistical physics, conformal field theory, gauge fields in condensed matter physics, cosmology, complex networks, sociophysics, history and philosophy of physics, these are the fields in which he works.
At this point on behalf of his friends, colleagues and the community at large, it is appropriate to celebrate Bertrand Berche’s jubilee and to wish him continued success on his way
A Bertrand-Edgeworth-oligopóliumok (Bertrand-Edgeworth oligopolies – a survey of the literature)
No full textAz irodalomban az olyan oligopolmodellek, amelyekben mind az ár, mind a mennyiség döntési változó, Bertrand-Edgeworth-oligopóliumok néven ismertek. E tanulmányban a Bertrand-Edgeworth-oligopóliumokkal kapcsolatos érdekesebb eredményeket tekintjük át. Tárgyaljuk a Bertrand-Edgeworth-típusú oligopolmodellek specifikációját, a Nash-egyensúly létezését, a Nash-egyensúly meghatározását és a Bertrand-Edgeworth-oligopóliumok alkalmazásait. / === / Oligopoly models in which both price and quantity are decisive variables are known in the literature as Bertrand-Edgeworth oligopolies, the most interesting results with which are surveyed in this paper. The author assumes the existence of the Nash equilibrium, as the specification of Bertrand-Edgeworth-type oligopoly models, the determination of the Nash equilibrium, and the application of Bertrand-Edgeworth oligopolies
Data used for the spatio-temporal analysis of the climatic debt observed in understory plant communities
No full textDetails about the variables' computation and definition are provided in Bertrand 2018 and Bertrand et al. 2016. References: Bertrand, R.et al. (2016) Ecological constraints increase the climatic debt in forests. Nature communications 7: 12643. Bertrand, R. (2018) Unequal contributions of species’ persistence and migration on plant communities’ response to climate warming throughout forests. Ecography. Accepted Author Manuscript
La constante cosmologique et le déploiement de l’espace
No full textOn discute dans cette note le rôle joué par la constante cosmologique dans le modèle cosmologique standard et quelques scénarios alternatifs proposés dans la cosmologie moderne depuis la découverte de l’accélération de l’expansion cosmique.In this contribution we discuss the role of the cosmological constant in the standard cosmological model as well as some alternative scenarii proposed in modern cosmology since the discovery of the acceleration of the Universe expansion
Le origini del liberalsocialismo di Bertrand Russell
No full textIl saggio prende in esame le origini del liberalsocialismo di Bertrand Russell. Afferma che tutte le tesi maggiori dell'autore inglese sono presenti nelle prime opere politiche che pubblica.The essay deals with the origins of the liberal socialism of Bertrand Russell. The thesis is that all major ideas of the english author are present in first political books he publish
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