Build the One Key event study when people join while booking
Causal inferenceHardProblem. You want to estimate how much One Key membership increases bookings, using membership data and booking histories. Most travelers join One Key in the middle of making a booking. How do you build the analysis, and what are the traps?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.