Search results for " externalities"
showing 10 items of 13 documents
Spatial Localization in Manufacturing: A Cross-Country Analysis
2009
This paper employs a homogenous firms' database to investigate industry localiza- tion in European countries. More specifically, we compare, across industries and countries, the predictions of two of the most popular localization indices, i.e., the Ellison and Glaeser index (Ellison and Glaeser, 1997) and the Duranton and Over- man index (Duranton and Overman, 2005). We find that, independently from the index used, localization is a pervasive phenomenon in all countries studied, but the degree of localization is very uneven across industries in each country. Furthermore, we find that the two indices significantly diverge in predicting the intensity of the forces generating localization with…
Morphological similarities between DBM and a microeconomic model of sprawl
2010
JEL classification : C61; C63; D62; R21; R40; International audience; We present a model that simulates the growth of a metropolitan area on a 2D lattice. The model is dynamic and based on microeconomics. Households show preferences for nearby open spaces and neighbourhood density. They compete on the land market. They travel along a road network to access the CBD. A planner ensures the connectedness and maintenance of the road network. The spatial pattern of houses, green spaces and road network self-organises, emerging from agents individualistic decisions. We perform several simulations and vary residential preferences. Our results show morphologies and transition phases that are similar…
Justice et inégalités: un amendement à la théorie de John Rawls
1992
National audience; On se demande si les principes de justice de Rawls ne sont pas exagérément inégalitaires, malgré leur côté "juste". On examine donc ce qu'il advient de l'optimum de Rawls, le maximin, quand de l'aversion pour l'inégalité" apparaît. Le maximin consiste à se placer sur un certain point de la courbe d'efficience, en admettant une certaine dose d'inégalité, pourvu que l'on donne le maximum possible aux plus défavorisés. On tient compte d'externalités en reprenant la notion d'envie sous la forme d'une aversion pour l'inégalité, essentiellement de la part des plus défavorisés. On ne peut plus raisonner sur la courbe frontière des rémunérations possibles et on démontre la validi…
The impact of corruption on sport demand
2020
PurposeThe article presents an empirical analysis that evaluates the effects of a systemic corruption scandal on the demand in the short and the long run. In 2006, the Calciopoli scandal uncovered the match rigging in the Italian soccer first division. The exemplary sportive sanction of relegating the primary culprit to the second division imposed further negative externalities on the other clubs. Should we prefer the sportive sanction on the team or the monetary fines for the club?Design/methodology/approachWe estimated two log-linear models of the demand side (stadium attendance) using a fixed effect estimator, on two panel data set made of all the Italian soccer clubs in the first and se…
Prices and Pareto optima
2006
We provide necessary conditions for Pareto optimum in economies where tastes or technologies may be nonconvex, nonsmooth, and affected by externalities. Firms can pursue own objectives, much like the consumers. Infinite-dimensional commodity spaces are accommodated. Public goods and material balances are accounted for as special instances of linear restrictions.
The marketplace of ideas and its externalities: Who pays the cost of online fake news?
2023
Since the nineteenth century, thanks to J.S. Mill, an argument against limiting the freedom of expression has been gaining ground, namely that the truth of an argument is the result of free competition between different ideas in a “marketplace of ideas” and that this competition can yield an approximate form of the truth or a robust argument. In this paper I will argue that Mill’s model of the marketplace of ideas is an “idealised” model because it assumes that there is a subject who seeks to know in a detached manner, without being influenced by his or her expectations, needs, ideologies, or biases. However, the metaphor of the marketplace of ideas is still relevant because it also harbour…
Do agglomeration economies are lower for polluting sectors?
2019
This article explore how the relation between productivity and local city-size can be mitigated by pollution. More specifically, we estimate agglomeration economies considering a new source of heterogeneity among industries: the degree of pollution. Due to pollution perception acting as a dispersion force, we expect net agglomeration economies to be lower for polluting firms. In fact, polluting firms may anticipate that households and other firms are reluctant to locate near sources of pollution. In this paper, we exploit spatial data on sectoral emissions for a large number of air pollutants. We define a continuous variable of pollution that varies across sectors and employment zones. Our …
Agglomeration Externalities and the Productivity of Italian Firms
2015
Despite the richness of contributions on the effects of agglomeration on economic activity, the empirical evidence still falls short, especially at the microeconomic level, where they should matter the most. This paper adds to this literature by performing an empirical exploration of the role of Marshallian, Jacobian, and Porterian externalities for the productivity of Italian firms. In particular, a large dataset of small and medium enterprises is first employed to estimate firm-level total factor productivity (TFP). Then dynamic panel and instrumental variables estimation methods are used to assess the effects of agglomeration externalities. The findings seem to suggest that these effects…
Le développement des médias sociaux. Proposition d'un modèle de diffusion intégrant les externalités de réseau dans un cadre concurrentiel
2011
International audience; La fréquentation des médias sociaux est très concentrée. L’intérêt de ce type de sites résidant dans la richesse du contenu élaboré par les participants, ce phénomène peut être en partie expliqué par les externalités de réseau. Afin de démontrer cet effet dans un cadre concurrentiel, cette recherche propose un modèle de diffusion intégrant le principe de l’attachement préférentiel issu des recherches en réseaux complexes. Ce modèle est analysé au travers d’une simulation et appliqué à 51 médias sociaux dans trois secteurs différents. Les résultats montrent que l’ajout de l’effet d’attraction menée par la taille relative du réseau social explique mieux la diffusion qu…
An Economic Definition of the City
1998
International audience