transport.def

autotime  bustime   dtime  auto
  
	Obs:   21 
	
	autotime	commute time via auto, minutes
	bustime		commute time via bus, minutes
	dtime		bus time - auto time
	auto		= 1 if auto chosen
	
Data source: Ben-Akiva and Lerman, Discrete choice analysis, 1985, MIT Press 



    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
    autotime |        21    49.34762    32.43491         .2       99.1
     bustime |        21    48.12381    34.63082        1.6       91.5
       dtime |        21   -1.223809    56.91037      -90.7         91
        auto |        21    .4761905    .5117663          0          1