Sorry about the paywalled link. Here is one that should be freely accessible. http://www.anderson.ucla.edu/faculty_pages/keith.chen/papers/Final_NBER17.pdf http

Sorry about the paywalled link. Here is one that should be freely accessible. http://www.anderson.ucla.edu/faculty_pages/keith.chen/papers/Final_NBER17.pdf http://www.anderson.ucla.edu/faculty_pages/keith.chen/papers... I agree that the mean and median could in principal be this far apart, but it would require a lot of skew in the data (small number of very high value trips -- seems possible).