traffic2: traffic2
In jcpernias/ec1027: Data and Functions for the course EC1027 - Econometrics I

Description Usage Format Details Notes Source

Speed limits and highway safety.

1	data("traffic2")

A data frame with 108 observations.

year: 1981 to 1989
month: 1 to 12
totacc: statewide total accidents
fatacc: statewide fatal accidents
injacc: statewide injury accidents
pdoacc: property damage only accidents
ntotacc: noninterstate total acc.
nfatacc: noninterstate fatal acc.
ninjacc: noninterstate injur acc.
npdoacc: noninterstate property acc.
rtotacc: total acc. on rural 65 mph roads
rfatacc: fatal acc. on rural 65 mph roads
rinjacc: injury acc. on rural 65 mph roads
rpdoacc: property acc. on rural 65 mph roads
ushigh: acc. on U.S. highways
cntyrds: acc. on county roads
strtes: acc. on state routes
unem: state unemployment rate
spdlaw: =1 after 65 mph in effect
beltlaw: =1 after seatbelt law
wkends: number of weekend days in month

Data used in: P.S. McCarthy (1994), “Relaxed Speed Limits and Highway Safety: New Evidence from California,” Economics Letters 46, 173–179. Professor McCarthy kindly provided the data.

Many states have changed maximum speed limits and imposed seat belt laws over the past 25 years. Data similar to those in traffic2 should be fairly easy to obtain for a particular state. One should combine this information with changes in a state’s blood alcohol limit and the passage of per se and open container laws.

Jeffrey M. Wooldrige (2006): Introductory Econometrics: A Modern Approach, 3rd ed., Thomson South-Western.

jcpernias/ec1027 documentation built on Dec. 20, 2021, 10:03 p.m.