Conceptualizing Economic Marginalization

What exactly is 'economic marginalization'? How should one conceptualize it, and what are the implications of such conceptualization? Economic marginalization can be conceptualized as outcome or as process (or structure). On outcomes, marginalization can be a static description, or a dynamic characterization of how things are moving. On process or structure, two important dimensions are integration into market structures, and integration into state structures. These notes for the Living at the Margins Conference are an attempt to put forward some ideas for debate and discussion.