More than three-quarters of medium-to-large companies have adopted policies on shared economy services such as Uber, Lyft and Airbnb, according to Chrome River, an expense management company.  A survey of 100 finance executives at companies with 1,000 or more employees showed that 78% allow employees to use ride-sharing services, and 68% allow employees to use shared accommodation services. The number of companies which mandate their use is still low. Thirteen percent of companies overall currently mandate the use of ride-sharing for their employees, with slightly fewer (12 percent) requiring shared accommodations. Among companies whose policies explicitly permit sharing economy services, 21 percent mandate their use for ground transportation and 23 percent for lodging. “Corporate travel and expense policies should be agile enough to address the ever-changing nature of business travel,” said Alan Rich, CEO of Chrome River. “It’s refreshing to see that larger organizations have already incorporated sharing economy services into their policies.”