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A Higher Common Sense

A Higher Common Sense

A place for Writings about Evidence-Based Design

  • CS 177 Human Centered Product Management
    • CS177 Human Centered Product Management Syllabus
      • Lecture 5B- Agile and Storymapping
    • Lecture 1A | Introduction to Human-Centered Product Management
      • What do you want from CS177
      • 1A Welcome to CS 177: Human-Centered Product Management 1
    • Lecture 1B | Human-Centered Product Management
      • 1B Strategy for Human-Centered Product Management
    • Lecture 2A | Human-Centered Product Management
    • Lecture 2B | Human-Centered Product Management
    • Lecture 3A – Markets & Tech Stack
    • Lecture 3B — Guest and Value Proposition
    • Lecture 4B – Participatory Roadmaps & Case Study
    • Lecture 5a– Agile, User Stories and User Story Mapping
  • CS247B Design for Behavior Change
    • 1A Introducing Design for Behavior Change
    • 1B Norms, Models, Brainstorm, Screeners
    • 2A Norms and Study Guide
    • 2B Ethics, Persuasion and B=MAT
    • 3A Secondary Research and Theories of Behavior Change
    • 3B Switch, Fraud,
  • Product Management Library
  • The How and Why of Sketchnotes
    • Glossary for Design Techniques
CS177 Human Centered Product Management

Welcome to A Higher Common Sense

PSP 5: Three North Star Metrics

October 26, 2026

For Airbnb, nights booked was chosen as a core metric since it serves as a proxy for how both parties (hosts and guests) are…

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When Good Metrics Go Bad: Airbnb, Facebook, and Slack

October 25, 2026

The best product metrics measure more than activity. They capture whether users are actually finding value. But what happens when teams start optimizing the…

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PSP 5: Three North Star Metrics

October 25, 2026

AirBnB’s North Star metric (NSM) evolved over time, changing from revenue per booked unit to number of listings. They eventually settled on number of…

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Week 5 PSP: Three North Star Metrics

October 25, 2026

Facebook’s 7 Friends in 10 Days: Facebook’s early growth team found that users who hit this milestone rarely stopped using the service. It was…

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Week 5 PSP: Three North Star Metrics

October 25, 2026

Airbnb, Facebook, and Slack used different metrics because they focused on different growth strategies. Airbnb focused on consumption growth, Facebook on engagement growth, and…

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PSP 5: Three North Star Metrics

October 25, 2026

Airbnb: Nights booked Airbnb’s north star “nights booked” works because it’s a single number that proves both sides of the marketplace are getting value….

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PSP 5

October 25, 2026

Airbnb’s nights booked Airbnb treats a night booked as the single unit of transaction on its platform. Every night means a host got paid…

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Week 5 PSP: Three North Star Metrics

October 24, 2026

Airbnb’s North Star metric, nights booked, correlates with value delivered to both hosts and visitors as a two-sided marketplace and is also tied to…

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Week 5 PSP: Three North Star Metrics

October 24, 2026

Each of these companies were steered by specific threshold metrics to overcome the cold-start problem and drive irreversible user retention. Airbnb tracked nights booked…

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  • Ashley Mujica-Pinto on Product Sense Pushup 2: Three Ways Into a Market
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