Since at least Engle (1982) and Stock and Watson (2002), we know that the conditional variance of future output and inflation evolves over time. However, in these seminal contributions, the risk of real activity and inflation is implicitly considered as symmetric. In this paper, we investigate the time evolution of the conditional distribution of macroeconomics variables with a special interest...

The identical agent, identical good Bertrand game is associated with prices at marginal cost the Bertrand Paradox. If consumers make occasional mistakes I show that the standard Bertrand game gives rise to positive profits and prices above marginal cost. Some firms charge low prices to capture the bulk of the sales while others charge high prices selling to mistaken consumers. Furthermore, with...

The Bertrand-Darboux integrability condition for a certain class of perturbed harmonic oscillators is studied from the viewpoint of the BirkhoffGustavson(BG)-normalization: In solving an inverse problem of the BGnormalization on computer algebra, it is shown that if the perturbed harmonic oscillators with a homogeneous cubic-polynomial potential and with a homogeneous quartic-polynomial potenti...

Achieving software reliability takes many complementary techniques, directed at the process or at the products. This survey summarizes some of the most fruitful ideas. Cite as follows: Bertrand Meyer, Dependable Software, to appear in Dependable Systems: Software, Computing, Networks, eds. Jürg Kohlas, Bertrand Meyer, André Schiper, Lecture Notes in Computer Science, Springer-Verlag, 2006.