Your question is Incremental Supply Test for Driver Incentives. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You work on a ride-sharing marketplace and are considering a new driver incentive. Early results suggest more drivers are online, but leadership is concerned the incentive may just be paying for trips and hours that would have happened anyway.
How would you determine whether the incentive is creating incremental supply or simply subsidizing existing behavior? Walk through how you would define success, choose the unit of randomization, and decide whether the test is worth shipping.