Growth and Spatial Dependence - The Mankiw, Romer and Weil model revisited

The aim of this paper is to analyze the theoretical and econometric implications of omitting spatial dependence in the Mankiw, Romer, and Weil model. Indeed, the international distribution of income levels and growth rates suggests the existence of large international disparities, and therefore the important role of location on economic performance. However, taking spatial dependence into account requires resorting to the methods of Spatial Econometrics, not only for a valid statistical inference, but also for revaluating the impact of the variables generally considered as crucial in the growth phenomenon and finding the processes underlying growth rates and income levels.

Fiscalité et secteur informel au Sénégal

This paper deals with informal firms’ behavior regarding tax registration and compliance. Data from the Investment Climate Assessment (ICA) survey in Senegal, conducted by the World Bank in 2004, were used within a microeconometric framework. Results reveal that taxes owed by unregistered firms are relatively low, roughly amounting to 3% of their returns. The study also shows that visibility indicators, information, as well as tax control and firms’ assessment of the Government’s fiscal policy are likely to increase the probability of tax registration. However such variables as education, age, the tax rate, size and the turnover indicate a behavior close to anticipation and profit maximization

Fiscalité et secteur informel au Sénégal

This paper deals with informal firms’ behavior regarding tax registration and compliance. Data from the Investment Climate Assessment (ICA) survey in Senegal, conducted by the World Bank in 2004, were used within a microeconometric framework. Results reveal that taxes owed by unregistered firms are relatively low, roughly amounting to 3% of their returns. The study also shows that visibility indicators, information, as well as tax control and firms’ assessment of the Government’s fiscal policy are likely to increase the probability of tax registration. However such variables as education, age, the tax rate, size and the turnover indicate a behavior close to anticipation and profit maximization

Croissance, capital humain et interactions spatiales : une étude économétrique.

The aim of this paper is to analyze the theoretical and econometric implications of omitting spatial dependence in the Mankiw, Romer, and Weil (1992) model. Indeed, the international distribution of income levels and growth rates suggests the existence of large international disparities, and therefore the important role of location on economic performance. However, taking spatial dependence into account requires resorting to the methods of Spatial Econometrics, not only for a valid statistical inference, but also for revaluating the impact of the variables generally considered as crucial in the growth phenomenon and finding the processes underlying growth rates and income levels. / L'objectif de cet article est d'analyser les implications économétriques et théoriques de l'omission de la dépendance spatiale dans le cadre de l'estimation du modèle de Mankiw, Romer et Weil (1992). En effet, la distribution internationale des taux de croissance et des niveaux de revenu suggère l'existence de bassins de croissance et de récession, et donc un rôle important de la localisation dans les performances économiques. Cependant, la prise en compte de l'autocorrélation spatiale dans l'estimation nécessite de recourir aux méthodes de l'économétrie spatiale afin, non seulement d'obtenir une inférence statistique valide, mais également d'élucider les processus qui sous-tendent la détermination des rythmes de croissance et des niveaux de revenu.Economic growth ; Human capital ; convergence ; spatial econometrics ; Croissance économique ; capital humain ; convergence ; économétrie spatiale