Peter Dietsch

RÉSUMÉ: La notion de propriété de soi présuppose la définition des droits de propriété sur les ressources externes que le libertarisme de gauche limite habituellement aux ressources naturelles. Or, dans une économie spécialisée, la propriété de soi doitégalement être complétée par une définition des droits de propriété sur le surplus coopératif. S'il est cohérent, pour un libertarien de gauche, de considérer le surplus coopératif comme ressource externe et de le distribuer d'une manière égale, on doit en outre observer qu'une théorie de la justice doit se prononcer sur les questions distributives dans plusieurs contextes. Articuler les différences entre ces contextes nous permet de préciser la relation que le libertarisme de gauche entretient avec d'autres théories de la justice.ABSTRACT: Any substantive notion of self-ownership presupposes well-defined property rights over external resources. Left-libertarians usually limit this category to natural resources. I argue that in a specialized economy, substantive self-ownership equally needs to be complemented by a definition of property rights to the cooperative surplus. The natural way for left-libertarianism to provide such a definition is to view the cooperative surplus as an external resource and to distribute it equally. The second part of the article makes the general point that a complete theory of justice needs to take a stance on distribution in various contexts. Articulating the differences between these contexts allows us to gain a better understanding of how left-libertarianism relates to other theories of justice

How much inequality does market interaction generate? The answer to this question partly depends on the level of competition among economic agents. Yet, in their normative analysis of the market, theories of distributive justice focus on individual characteristics such as talents as determinants of income, and tend to ignore structural features such as competition. Economists, on the other hand, dispose of the conceptual tools to assess the distributive impact of competition, but their analysis is usually limited to allocative efficiency. Part I of the article distinguishes my argument from conventional perspectives on income inequality and redistribution. Whereas the latter propose either to redistribute income once the market interaction has taken place or to adjust the initial holdings of market participants, I focus on the distributive impact of the institutional structure of the market itself. Part II outlines the ways in which various forms of competition affect distribution. My objective here is descriptive in nature, but shows that a normative evaluation of the market has to take seriously the distributive impact of competition. This impact can be broken down into the analysis of three overlapping groups of economic agents, namely consumers, workers, and capital owners. Consumers potentially gain from competition in the form of lower prices, but these gains are only realized if competition does not put pressure on their work income at the same time. Unless competition squeezes profits unusually hard, capital owners tend to benefit from competition