th April 1999. We are grateful for the comments and suggestions received from colleagues in the TIPIK Project, although it has not been possible for all of those to be absorbed in the present version. Please do not reproduce or quote without permission of the authors.
* Much of the material in this paper arises from the collaborative work done with Nicolas Jonard, and owes much to him. I also acknowledge the very helpful comments of Muge Ozman and encouraging words of Franco Malerba. Much of modern micro-economics is built from the starting point of the perfectly competitive market. In this model there are an infinite… (More)
In this paper a model for the formation of strategic alliances is studied. Innovation results from the recombination of knowledge held by the partners to the collaboration, and from the history of their collaboration. Innovation brings partners closer together, while at the same time the repetition of partnerships fosters trust and helps improving the… (More)
We model knowledge diffusion in a population of agents situated on a network, interacting only over direct ties. Some agents are by nature traders, others are by nature " givers " : traders demand a quid pro quo for information transfer; givers do not. We are interested in efficiency of diffusion and explore the interplay between the structure of the… (More)
We present a measurement of the time-dependent CP-violating (CPV) asymmetries in B0-->K(0)(S)pi(0) decays based on 124x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. In a sample containing 122+/-16 signal decays, we obtain the magnitudes of the direct CPV asymmetry… (More)
helpful comments in different stages of the work. The usual disclaimers apply. ABSTRACT: This paper aims to understand some of the mechanisms which dominate the phenomenon of knowledge diffusion in the process that is called 'social learning'. We examine how knowledge spreads in a network in which agents interact by word of mouth. The social network is… (More)
We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of Upsilon(4S) decays collected in 2001, bringing the data available to 32 x 10(6) BB macro pairs. We select events in which one neutral B meson is fully… (More)
This paper models the development of consumption when there are interactions among consumers. The consumer recognizes three reference groups: a peer group of similar consumers; a distinction group; and an aspiration group. The interplay of aspiration and distinction can lead to 'waves' in consumption, when, for example, the avant-garde consumption of… (More)