Unbalance of trade: China-America talks

Negotiations to end the trade war have been ruffled as the Trump administration again ramped up tariffs. But even if a deal is struck, that won’t address serious systemic troubles in the countries’ relationship. Many diets rely on simply counting calories, but the truth is that the scientific-sounding measure is mightily misleading. And, as Uber goes public, we take an instructive ride through historic disruptions of the taxi industry.