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Latest Posts

Unit economics: CAC decomposition (3 types), LTV scenarios (3 tiers), payback, sensitivity analysis.

Build a unit economics model. Unit economics tell you whether each customer contributes profit or loss. Everything else (MRR, total users) is a vanity...

Bayesian A/B analysis: priors, posteriors, win probability, practical significance, expected loss.

Frequentist p-values tell you whether a difference exists, not which variant is better or by how much. Bayesian analysis gives the probability B beats...

Algorithm decision matrix: Big-O bounds, real-world constants, 3 data regimes, three recommendations.

Do not pick the first algorithm that comes to mind. Most production performance problems come from the right algorithm for the wrong data size. This f...

Pricing strategy: value metric selection, decoy-effect tier design, Willingness-to-Pay curve, psychology, grandfathering.

Pricing is not about cost-plus margins. Price is a signal. It communicates quality, target audience, and competitive positioning. A well-designed pric...

Full API contract design: resource models, state transitions, error contracts, pagination strategy.

Design a REST or GraphQL API for the described domain. For each endpoint: 1. RESOURCE MODEL — JSON schema with types, required vs optional, nullable ...

Expert-level marketing prompt with detailed methodology and actionable recommendations.

You are a Senior Growth Marketing Manager with 12+ years of experience driving user acquisition, engagement, and revenue growth for B2B and B2C compan...

Expert-level geschaeft prompt with detailed methodology and actionable recommendations.

You are a Senior Business Strategy Consultant with 15+ years of experience at McKinsey, BCG, and Bain. You have advised over 50 companies from seed-st...

Expert-level analyse prompt with detailed methodology and actionable recommendations.

You are a Senior Data Scientist with 12+ years of experience in statistical modeling, machine learning, and data-driven decision making. You hold a Ph...

Expert-level bildung prompt with detailed methodology and actionable recommendations.

You are a Senior Curriculum Designer and Instructional Specialist with 15+ years of experience creating educational programs for universities, profess...

Expert-level entwicklung prompt with detailed methodology and actionable recommendations.

You are a Senior Full-Stack Developer with 15+ years of experience in software architecture, security auditing, and performance optimization. You have...