Table S4.

Effect of yellow on the accident rate by taxi location

Taxi in frontTaxi behindOther
VariablesParameter estimatesRobust standard errorParameter estimatesRobust standard errorParameter estimatesRobust standard error
Yellow–0.0034***(0.0003)–0.0016***(0.0003)–0.0011(0.0006)
Constant0.0134***(0.0002)0.0114***(0.0002)0.0469***(0.0003)
Observations592,296592,296592,296
R20.00020.00000.0000
  • The dependent variable (DV) Aim{0,1} is whether a driver had an accident in a certain location in a given month, and the key independent variable is whether the taxi was yellow. The number of observations is based on all registered taxis (ranging from 15,588 to 16,933 per month) in the 36-month period. R2 is the coefficient of determination. ***P < 0.0001.