A neat little discussion occurring at Brad DeLong’s Semi Daily Journal, regarding the question whether Sen’s paradoxon – which basically says that it is possible to dream up utility functions which would allow liberalism and the pareto principle to be in conflict – is actually a paradoxon. And it is evolving into a real debate about the different meanings of liberalism/libertarianism. Be sure to check read the comments, at least flip through them if you don’t have two hours to spare…