Article published in Chaos: An Interdisciplinary Journal of Nonlinear Science – September 2017
Common dynamical properties of business cycle fluctuations are studied in a sample of more than 100 countries that represent economic regions from all around the world. We apply the methodology of multivariate singular spectrum analysis (M-SSA) to identify oscillatory modes and to detect whether these modes are shared by clusters of phase- and frequency-locked oscillators. An extension of the M-SSA approach is introduced to help analyze structural changes in the cluster configuration of synchronization. With this novel technique, we are able to identify a common mode of business cycle activity across our sample, and thus point to the existence of a world business cycle. Superimposed on this mode, we further identify several major events that have markedly influenced the landscape of world economic activity in the postwar era.
Under non-exponential discounting, we develop a dynamic theory for stopping problems in continuous time. Our framework covers discount functions that induce decreasing impatience. Due to the inherent time inconsistency, we look for equilibrium stopping policies, formulated as fixed points of an operator. Under appropriate conditions, fixed-point iterations converge to equilibrium stopping policies.
Cette thèse a pour objectif d'étudier l'influence des nouveaux classiques sur la macroéconomie dans les années 1970 en mobilisant un appareil historiographique qui met au coeur de l'étude le rôle joué par la stagflation, et de confronter les résultats de cette étude avec l'histoire conventionnelle de la macroéconomie.
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