The American economy is still, by most measures, deeply depressed. But corporate profits are at a record high. How is that possible? Itís simple: profits have surged as a share of national income, while wages and other labor compensation are down. The pie isnít growing the way it should ó but capital is doing fine by grabbing an ever-larger slice, at laborís expense.

Wait ó are we really back to talking about capital versus labor? Isnít that an old-fashioned, almost Marxist sort of discussion, out of date in our modern information economy? Well, thatís what many people thought; for the past generation discussions of inequality have focused overwhelmingly not on capital versus labor but on distributional issues between workers, either on the gap between more- and less-educated workers or on the soaring incomes of a handful of superstars in finance and other fields. But that may be yesterdayís story.

More specifically, while itís true that the finance guys are still making out like bandits ó in part because, as we now know, some of them actually are bandits ó the wage gap between workers with a college education and those without, which grew a lot in the 1980s and early 1990s, hasnít changed much since then. Indeed, recent college graduates had stagnant incomes even before the financial crisis struck. Increasingly, profits have been rising at the expense of workers in general, including workers with the skills that were supposed to lead to success in todayís economy.

Why is this happening? As best as I can tell, there are two plausible explanations, both of which could be true to some extent. One is that technology has taken a turn that places labor at a disadvantage; the other is that weíre looking at the effects of a sharp increase in monopoly power. Think of these two stories as emphasizing robots on one side, robber barons on the other.

About the robots: thereís no question that in some high-profile industries, technology is displacing workers of all, or almost all, kinds. For example, one of the reasons some high-technology manufacturing has lately been moving back to the United States is that these days the most valuable piece of a computer, the motherboard, is basically made by robots, so cheap Asian labor is no longer a reason to produce them abroad.

In a recent book,ďRace Against the Machine,Ē M.I.T.ís Erik Brynjolfsson and Andrew McAfee argue that similar stories are playing out in many fields, including services like translation and legal research. Whatís striking about their examples is that many of the jobs being displaced are high-skill and high-wage; the downside of technology isnít limited to menial workers.

Still, can innovation and progress really hurt large numbers of workers, maybe even workers in general? I often encounter assertions that this canít happen. But the truth is that it can, and serious economists have been aware of this possibility for almost two centuries. The early-19th-century economist David Ricardo is best known for the theory of comparative advantage, which makes the case for free trade; but the same 1817 book in which he presented that theory also included a chapter on how the new, capital-intensive technologies of the Industrial Revolution could actually make workers worse off, at least for a while ó which modern scholarship suggests may indeed have happened for several decades.

More at http://www.nytimes.com/2012/12/10/opinion/kru...