Uber Technologies Inc. and Airbnb Inc. have set their sights on global expansion. They are about to face a global response.
Mayors from New York to Paris and Seoul think they have found the trick to coping with so-called "sharing economy" apps — working together. Ten markets are jointly preparing a unified rule book in a bid to leverage their combined size to promote clearer ground rules.
These companies have been used to dealing with regulators, but they have done so mostly on a city-by-city basis.
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