Video · ~20 min

Kunal Shah on the Delta 4 Theory (TechSparks talk)

Kunal Shah · YouTube (YourStory TechSparks) Free Beginner India

This is Kunal Shah laying out the Delta 4 rule in his own words, the exact framework behind our short answer. You get the core test straight from the source: score your product against the status quo on a ten point scale, and only a gap of four or more creates irreversible switching. It is short, concrete, and built on Indian examples he studied firsthand.

  • A four point or larger efficiency gap is what makes a switch stick
  • Irreversible behaviour is the real signal of a great idea, not marginal preference
  • Big deltas create a brag worthy proposition that spreads by word of mouth

The question it answers

  1. What makes an Indian startup idea work when the market is so price-sensitive?

Read with it

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  3. The essay that put 'product-market fit' into the startup vocabulary. Read it for the gut-level description of what PMF feels... pmarchive.com Essay · ~15 min read The Only Thing That Matters Marc Andreessen
  4. Video · ~15 min Companies That Grow Without Ads (Delta-4 Theory) Kunal Shah (Founder, CRED)
  5. The definitive framework for building products people return to without paid nudges, the Hook Model, backed by a million-plus... Portfolio / Penguin (nirandfar.com) Book · Book (~256 pages) Hooked: How to Build Habit-Forming Products Nir Eyal (with Ryan Hoover)
  6. When you are the only one selling something like your product, cost-plus and competitor benchmarks give you nothing to anchor... Wiley (2016) Book · Book, ~240 pages Monetizing Innovation: How Smart Companies Design the Product Around the Price Madhavan Ramanujam and Georg Tacke
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