_dta:
  1.  by Jean Roth , jroth@nber.org , 22 May 2014

  obs:        44,018                          
 vars:             4                          22 May 2014 09:50
 size:       308,126                          (_dta has notes)
-------------------------------------------------------------------------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------------------------------------------------------------------------
state           byte    %8.0g                 State Number
st_case         long    %12.0g                Consecutive Number
veh_no          byte    %8.0g                 Vehicle Number
mdrdstrd        byte    %8.0g                 Driver Distracted By
-------------------------------------------------------------------------------------------------------------------------------------------------
Sorted by: st_case  veh_no  mdrdstrd