We present and discuss the padé z-transform method for the identification of a transfer function model; an application is given with the geometric lag model, the ratios of which can be real and/or complex numbers. The method consists first in considering the z-transform of the transfer function...

The general purpose of this paper is to develop a linear response formalism for stochastic multiperiodic systems; these systems being obtained by letting some stochastic perturbation act on deterministic multiperiodic systems. Such a formalism is then applied to the absorption coefficient of the...

Recently it has been proposed a modification of the Wigner function which consists in smoothing it by convolution with a phase-space gaussian function; this smoothed Wigner function is non-negative if the gaussian parameters Δ and δ satisfy the condition Δδ ⩾ ħ. We analyze in this paper...

We discuss the conditions under which a generalized Brownian motion exhibits symmetry with respect to time reversal. We show that such a property is closely related to a property we call ‘radiative balance’, which implies the existence of a state in which both the mechanical system and the...

The paper studies a behavioral learning process where an agent plays, at each period, an action with a probability which is proportional to the cumulative utility he got in the past with that action. The so-called CPR learning rule and the dynamic process it induces are formally stated and...

MIMOSA, modèle macroéconomique de l'économie mondiale, construit en commun par le CEPII et l'OFCE est maintenant opérationnel. Le présent article en présente les principales caractéristiques ainsi que quelques propriétés variantielles. Les économies des six plus importants pays...