Table S4.

Balance test, unattrited sample

Indicator	Control	Placebo	Treatment	Placebo vs. control	Treatment vs. control	Treatment vs. placebo
Vehicle attributes
Share with license KA…†	0.554	0.538	0.530	−0.016	−0.024*	−0.008
	(0.012)	(0.014)	(0.007)	(0.018)	(0.014)	(0.015)
Share with license KB…	0.446	0.462	0.469	0.016	0.023*	0.007
	(0.012)	(0.014)	(0.007)	(0.018)	(0.014)	(0.015)
Share with license KBK-N	0.123	0.130	0.128	0.006	0.005	−0.002
	(0.008)	(0.009)	(0.004)	(0.012)	(0.009)	(0.010)
Share with license KBP-S	0.007	0.008	0.010	0.001	0.003	0.002
	(0.002)	(0.002)	(0.001)	(0.003)	(0.003)	(0.003)
Claims data
Any previous claim‡	0.155	0.173	0.183	0.018	0.028***	0.010
	(0.009)	(0.010)	(0.005)	(0.013)	(0.010)	(0.012)
Any previous injury claim	0.080	0.078	0.083	−0.002	0.003	0.005
	(0.007)	(0.007)	(0.004)	(0.010)	(0.008)	(0.008)
Any previous fatality claim	0.015	0.018	0.017	0.003	0.002	−0.002
	(0.003)	(0.004)	(0.002)	(0.005)	(0.003)	(0.004)
Number previous claims per accident	2.349	1.913	1.710	−0.436	−0.639***	−0.203
	(0.207)	(0.161)	(0.066)	(0.267)	(0.168)	(0.160)
Annualized accident rate	0.079	0.098	0.106	0.018**	0.026***	0.008
	(0.005)	(0.007)	(0.003)	(0.008)	(0.007)	(0.008)
N	1,726	1,356	5,712	3,082	7,438	7,068

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.