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Table 1
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| Dependent variables | |
|---|---|
| Ttlge60 | Total crashes involving drivers > 60 years of age |
| Fatge60 | Fatal crashes involving drivers > 60 years of age |
| Injrge60 | Injury crashes involving drivers > 60 years of age |
| Pdoge60 | Property damage only crashes involving drivers > 60 years of age |
| Ttllt60 | Total crashes involving drivers < 60 years of age |
| Fatlt60 | Fatal crashes involving drivers < 60 years of age |
| Injrlt60 | Injury crashes involving drivers < 60 years of age |
| Pdolt60 | Property damage only crashes involving drivers < 60 years of age |
| Explanatory variables | |
|---|---|
| Rpcinc | County real per capita income: 1982-84 US $ |
| Cpigas | Regional consumer price index for gasoline: 1982-84 = 100 |
| Cpialc | Regional consumer price index for alcohol: 1982-84 = 100 |
| Uerate | County unemployment rate |
| Vmtge60 | County vehicle-miles traveled (vmt): drivers > 60 years old |
| Vmtlt60 | County vmt: drivers < 60 years old |
| Totvmt | Total county vmt |
| Popden | Persons per square mile in the county |
| Pctge60 | Share of the county population > 60 years old |
| Alclic | Number of retail alcohol licenses in the county |
| AB541 | Dummy variable for an omnibus DUI prevention law (effective Jan. 1, 1982), which equals 0 for 1981 and 1 for 1982-98 |
| APS | Dummy variable for an administrative per se license suspension law (effective July 1, 1990), which equals 0 for 1981-89 and 1 for 1990-98 |
| Slmt_65 | Dummy variable for 65 mph speed limits on rural Interstate highways (effective May 1987), which equals 0 for 1981-86 and 1 for 1987-98 |
| Slmt_70 | Dummy variable for 70 mph speed limits on portions of the state's Interstate highways (enacted in January 1997), which equals 0 for 1981-96 and 1 for 1997-98 |
| Pc_dui | Per capita DUI arrests in the county |
| Pcmcyc | Per capita motorcycle registrations in the county |