Table 3.

Balance test

Indicator	Control	Placebo	Treatment	Control vs. placebo	Control vs. treatment	Placebo vs. treatment
Vehicle attributes
Share with license KA...†	0.583	0.567	0.566	0.017	0.017	0.000
	(0.011)	(0.012)	(0.006)	(0.016)	(0.012)	(0.013)
Share with license KB...	0.416	0.433	0.433	−0.016	−0.016	0.000
	(0.011)	(0.012)	(0.006)	(0.016)	(0.012)	(0.013)
Share with license KBK-N	0.113	0.122	0.117	−0.009	−0.005	0.004
	(0.007)	(0.008)	(0.004)	(0.010)	(0.008)	(0.009)
Share with license KBP-S	0.006	0.009	0.009	−0.002	−0.003	−0.001
	(0.002)	(0.002)	(0.001)	(0.003)	(0.002)	(0.003)
Phase 1 attrition rate	0.175	0.229	0.276	−0.054***	−0.100***	−0.046***
	(0.008)	(0.010)	(0.005)	(0.013)	(0.011)	(0.012)
N	2,093	1,759	7,885	3,852	9,978	9,644
Claims data
Any previous claim‡	0.152	0.170	0.181	−0.018	−0.029***	−0.011
	(0.008)	(0.009)	(0.004)	(0.012)	(0.009)	(0.010)
Any previous injury claim	0.078	0.077	0.084	0.001	−0.005	−0.007
	(0.006)	(0.006)	(0.003)	(0.009)	(0.007)	(0.007)
Any previous fatality claim	0.015	0.016	0.016	−0.001	−0.001	0.001
	(0.003)	(0.003)	(0.001)	(0.004)	(0.003)	(0.003)
Number previous claims	2.563	1.938	1.775	0.626**	0.789***	0.163
	(0.211)	(0.141)	(0.062)	(0.256)	(0.167)	(0.151)
Annualized accident rate	0.079	0.097	0.104	−0.018**	−0.025***	−0.007
	(0.005)	(0.006)	(0.003)	(0.007)	(0.006)	(0.007)
N	2,093	1,759	7,885	3,852	9,978	9,644

Table covers only phase 1 vehicles, including both those that were found in phase 2 and those that were not. SEs in parentheses. Significant differences at **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.