Taxi and Limo czar David Yassky commissioned a study this year that confirmed a fact that New Yorkers have known for decades: It’s harder to catch a cab between 4 and 5 p.m., because drivers are changing shifts. Thanks, Yassky. [NYT] Related: Mark Jacobson’s 1975 New York story “Night-Shifting for the Hip Fleet,” which inspired the hit TV show Taxi.