Tight Margins

Tight Margins

The Matrix beneath the Map

From Cab Driver Unit Economics to the Case for Public Transit

Ashwinikumar Patil's avatar
Ashwinikumar Patil
Mar 10, 2026
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Part I: The Physics, the Baseline, and the Disruption

Prologue - Four Boxes on a Whiteboard

This essay began more than a decade ago, as I was thinking about behaviours of cabs/ rickshaws across various cities - Mumbai, Pune, Bengaluru, Kolkata, Chennai, and more. In the latest avatar, it had four numbered boxes (1, 2, 3A, 3B), some arrows, a density matri…

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