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De l'impact du progrès technique sur la croissance dans un modèle à générations de capital

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  • Marc Germain
  • Alphonse Magnus

Abstract

[eng] This paper focuses on the impact of technical progress on growth in the framework of a vintage capital model. This structure of capital allows for creative destruction, in the sense that the obsolescence of capital results from embodied technical progress in new equipments. The rate of growth is endogenous in Harrod-Domar's way and depends on a rate of technical progress which remains exogenous, contrary to what happens in endogenous growth theory. The model reduces to a system of linear differential-difference equations. Under a certain level of technical progress, the rate of growth is asymptotically constant. Above it, the model oscillates around a stationary state. Even if its impact is positive in a partial equilibrium context, an increase in the rate of technical progress has a negative impact on growth in a general equilibrium framework. [fre] Le but de ce papier est d'étudier l'impact du progrès technique sur la croissance au moyen d'un modèle à générations de capital. Une telle structure du capital permet d'intégrer l'idée schumpéterienne de création destructrice, au sens où l'obsolescence du capital existant résulte de l'incorporation du progrès technique à travers l'investissement en nouveaux équipements. Le taux de croissance est endogène à la manière d'Harrod-Domar et dépend d'un taux de progrès technique qui demeure exogène, contrairement à ce qui se produit dans le cadre de la théorie de la croissance endogène. Le modèle se ramène à un système d'équations différentielles aux différences linéaires. En dessous d'un certain seuil de progrès technique, l'économie tend asymptotiquement vers un sentier de croissance à taux constant. Au delà, le modèle se comporte de façon oscillatoire autour d'un état stationnaire. Même si son impact est positif dans un contexte d'équilibre partiel, une hausse du taux de progrès technique a un impact négatif sur la croissance dans un contexte d'équilibre général.

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  • Marc Germain & Alphonse Magnus, 1998. "De l'impact du progrès technique sur la croissance dans un modèle à générations de capital," Cahiers d'Économie Politique, Programme National Persée, vol. 32(1), pages 99-116.
  • Handle: RePEc:prs:caecpo:cep_0154-8344_1998_num_32_1_1228
    DOI: 10.3406/cep.1998.1228
    Note: DOI:10.3406/cep.1998.1228
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    References listed on IDEAS

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