Antitrust Dust European antitrust officials have been busy, and their latest target is a large but declining giant called Coca Cola. The investigation might be about practices, but it cannot be about market share. Market share alone is a baffling approach. Google is a monopoly, but it must be doing something right because 80 percent of online researchers use it and like it. If Google were to be broken up would the resulting change in competition get us to Mars faster? Coca Cola has so many challenges. Its top product is labeled as empty calories that lead to obesity, sickness, and finally death. In blind taste tests, this product is easily matched by several competitors. The whole soft drink industry is under assault, most notably in Mexic...