“El Mencho” was perhaps Mexico’s most wanted criminal. His death from wounds inflicted in an operation by special forces will surely please Donald Trump, who has been pressing the country’s president, Claudia Sheinbaum, to crack down on drug gangs. The risk, however, is that a wave of violence will ensue.

Recent macroeconomic data might suggest that AI is boosting productivity in America. Not so fast. The evidence so far is still thin. How will economists know when AI is having a market effect? We explain.