driving.des

year          minage        wkndfat       vehicmiles    d82           d90           d98
state         zerotol       totfatpvm     unem          d83           d91           d99
sl55          gdl           nghtfatpvm    perc14_24     d84           d92           d00
sl65          bac10         wkndfatpvm    sl70plus      d85           d93           d01
sl70          bac08         statepop      sbprim        d86           d94           d02
sl75          perse         totfatrte     sbsecon       d87           d95           d03
slnone        totfat        nghtfatrte    d80           d88           d96           d04
seatbelt      nghtfat       wkndfatrte    d81           d89           d97           vehicmilespc

obs:         1,200                          
 
year                        1980 through 2004
state                       48 continental states, alphabetical
sl55                        speed limit == 55
sl65                        speed limit == 65
sl70                        speed limit == 70
sl75                        speed limit == 75
slnone                      no speed limit
seatbelt                    =0 if none, =1 if primary, =2 if secondary
minage                      minimum drinking age
zerotol                     zero tolerance law
gdl                         graduated drivers license law
bac10                       blood alcohol limit .10
bac08                       blood alcohol limit .08
perse                       administrative license revocation (per se law)
totfat                      total traffic fatalities
nghtfat                     total nighttime fatalities
wkndfat                     total weekend fatalities
totfatpvm                   total fatalities per 100 million miles
nghtfatpvm                  nighttime fatalities per 100 million miles
wkndfatpvm                  weekend fatalities per 100 million miles
statepop                    state population
totfatrte                   total fatalities per 100,000 population
nghtfatrte                  nighttime fatalities per 100,000 population
wkndfatrte                  weekend accidents per 100,000 population
vehicmiles                  vehicle miles traveled, billions
unem                        unemployment rate, percent
perc14_24                   percent population aged 14 through 24
sl70plus                    sl70 + sl75 + slnone
sbprim                      =1 if primary seatbelt law
sbsecon                     =1 if secondary seatbelt law
d80                         =1 if year == 1980
d81                             
d82                            
d83                           
d84                          
d85                         
d86                          
d87                           
d88                        
d89                        
d90                        
d91                           
d92                           
d93                       
d94                           
d95                         
d96                          
d97                       
d98                       
d99                      
d00                        
d01                            
d02                             
d03                            
d04                          =1 if year == 2004
vehicmilespc                 vehicle miles per capita
