Paul Krugman is an editorial writer for the New York Times and a winner of the Nobel prize in economics. Yet more than any other economist in the country, he routinely discredits the very profession that has honored him.

Krugman says that Obamacare actually works. He also thinks the entire health care system would work better if government paid all our medical bills. In making these claims, he writes the way a non-economist would. Wherever there are people who think health policy problems can be solved without any knowledge of economics, Krugman is there to give them aid and comfort – week after week, month after month.

Here is a reader alert for some of Krugman’s most egregious errors.