UK Prime Minister Theresa May’s election campaign has run into a spot of bother. Less than a month ago the Tories were leading Labour by more than 20 percentage points and heading, it seemed, for a landslide victory on June 8. One recent poll has cut that lead to just five points. The setback is May’s fault — and, oddly …

If Donald Trump and Barack Obama agree on something, does that mean it’s true? In the case of Europe’s woeful support of its collective defense, yes: Member states need to contribute their “fair share” toward the North Atlantic Treaty Organization, a phrase both men used in speeches in European capitals. The question is what “fair share” means. Instead of measuring …

Economists, to put it mildly, are not known for their communication skills. The typical economics paper is written in a formal, stilted style, laden with phrases like ‘in the following subsection’ and ‘it has been shown that.’ Jargon flies thick and fast, interspersed with highly formalized mathematical definitions and propositions. For a non-economist to hack through the verbal jungle of …