Using data from 2006-09, Prof Nolan concludes that the number of globally dominant businesses in the manufacture of large commercial aircraft and carbonated drinks was two; of mobile telecommunications infrastructure and smart phones, just three; of beer, elevators, heavy-duty trucks and personal computers, four; of digital cameras, six; and of motor vehicles and pharmaceuticals, 10. In these cases, dominant businesses supplied between half and all of the world market. Similar degrees of concentration have emerged, after consolidation, in many industries