Economics is not a morality play.

You really have to go searching desperately to find any contemporary examples of good, old-fashioned runaway inflation.

Europe is often held up as a cautionary tale, a demonstration that if you try to make the economy less brutal, to take better care of your fellow citizens when they're down on their luck, you end up killing economic progress. But what European experience actually demonstrates is the opposite: social justice and progress can go hand in hand.

So, very early reports are that Obamacare exchanges are, as expected, having some technical glitches on the first day - maybe even a bit worse than expected, because it appears that volume has been much bigger than predicted. Here’s what you need to know: this is good, not bad, news for the program... Lots of people logging on and signing up on the very first day... is an early indication that it’s going to be fine, that plenty of people will sign up for the first year of health reform.

It should be possible to emphasize to students that the level of employment is a macroeconomic issue, depending in the short run on aggregate demand and depending in the long run on the natural rate of unemployment, with microeconomic policies like tariffs having little net effect. Trade policy should be debated in terms of its impact on efficiency, not in terms of phoney numbers about jobs created or lost.

The United States in particular and the West in general should be feeling a little embarrassed about all that lecturing we did to the Third World.

America's political landscape is infested with many zombie ideas - beliefs about policy that have been repeatedly refuted with evidence and analysis but refuse to die. The most prominent zombie is the insistence that low taxes on rich people are the key to prosperity.