Table S4.

Balance test, unattrited sample

IndicatorControlPlaceboTreatmentPlacebo vs. controlTreatment vs. controlTreatment vs. placebo
Vehicle attributes
 Share with license KA…0.5540.5380.530−0.016−0.024*−0.008
(0.012)(0.014)(0.007)(0.018)(0.014)(0.015)
 Share with license KB…0.4460.4620.4690.0160.023*0.007
(0.012)(0.014)(0.007)(0.018)(0.014)(0.015)
 Share with license KBK-N0.1230.1300.1280.0060.005−0.002
(0.008)(0.009)(0.004)(0.012)(0.009)(0.010)
 Share with license KBP-S0.0070.0080.0100.0010.0030.002
(0.002)(0.002)(0.001)(0.003)(0.003)(0.003)
Claims data
 Any previous claim0.1550.1730.1830.0180.028***0.010
(0.009)(0.010)(0.005)(0.013)(0.010)(0.012)
 Any previous injury claim0.0800.0780.083−0.0020.0030.005
(0.007)(0.007)(0.004)(0.010)(0.008)(0.008)
 Any previous fatality claim0.0150.0180.0170.0030.002−0.002
(0.003)(0.004)(0.002)(0.005)(0.003)(0.004)
 Number previous claims per accident2.3491.9131.710−0.436−0.639***−0.203
(0.207)(0.161)(0.066)(0.267)(0.168)(0.160)
 Annualized accident rate0.0790.0980.1060.018**0.026***0.008
(0.005)(0.007)(0.003)(0.008)(0.007)(0.008)
N1,7261,3565,7123,0827,4387,068
  • Table covers only phase 1 vehicles that were found in phase 2. SEs in parentheses. Significant differences at *10%, **5%, and ***1% levels.

  • Vehicle license plates are of the form KXX NNNX, where X represents a letter and N a number. KA… license plates were issued before KB… plates, and among KB… plates, KBK-N were issued before KBP-S.

  • Previous claims refer to claims recorded before recruitment.