The definition you just gave is actually the definition of poverty in the law, and the law, if I remember correctly.... I'm not even sure the law defines “social exclusion”. I work with the Centre for the Study of Poverty and Exclusion in Quebec, and we've come up with various recommendations for indicators of poverty—indicators of inequality also, because one thing we had just last week was a presentation by Jean-Michel Cousineau, who is an economist at the University of Montreal who was able to show that, of course, poverty and inequality are not the same thing, but the more unequal your society becomes, the more poverty you have. There is a connection.
So we're working on indicators of poverty, and we have good indicators for poverty, for inequality—but social exclusion, we're working on it. That's a concept that's.... Personally, I'm not convinced it would be the best avenue for you to use this concept, because there's no international consensus on what it means. The Europeans have gone through the same process as part of the open method of coordination. Each country in Europe has to produce national action plans against social exclusion, and at the European level they asked groups of social scientists to develop indicators, and they did. But most of the indicators they developed were really poverty indicators or deprivation indicators. For social exclusion, I think the British are coming up with some definitions. It's extremely difficult to reach a consensus on what it means. If you're not sure what it means, then of course measuring it is difficult.
I'm not saying we should not think about it, but given the state of knowledge on this question, it may not be the concept that's most helpful.