Of interest to those involved in either the debate over free-market anarchism or the debate over the relation between government intervention and economies/diseconomies of scale (or both):

In a recent article titled “Do Economies of Scale Exist in Private Protection? Evaluating Nozick’s ‘Invisible Hand’,” Brian Meehan argues that contrary to those (like Nozick) who think that even in the absence of violent conflict a competitive market for security firms in a stateless society would tend to evolve toward monopoly, state regulation of private security firms actually tends to result in an increase in firm size and a decrease in number of firms.