What’s the Impact? Experimentation and Causal Inference Get the Playbook
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Questions about the Playbook, coaching availability, pricing outside the US, or something I wrote. This reaches me directly.

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Three things worth knowing

  • How quickly I reply

    I answer everything myself, usually within a couple of days. If you are on a deadline, say so in the first line and I will move you up.

  • If you are asking about coaching

    Tell me what round is coming up and when. I work full time, so my calendar is tight, and I would rather tell you honestly that I cannot fit you in than take a booking that arrives too late to help.

  • If you are asking about a discount

    My digital products — the Data Science Interview Playbook and Master the Case Study — are priced for my core audience: people going for senior roles in tech with total compensation above $250k. If you are outside the US or going for less senior roles, and price is the only obstacle, reach out for a discount code. Discounts are for the digital products only. Coaching is already limited to evenings and weekends, and there are too few of those hours to discount them.

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I post short-form work on TikTok and Instagram, longer pieces on LinkedIn, full tutorials with code on YouTube, and the complete simulation write-ups on Substack. LinkedIn messages reach me, though more slowly than this form.