---
id: books/urban-dynamics
about:
  label: Urban Dynamics
  description: >-
    Jay Forrester's 1969 system-dynamics model of a city as feedback loops among
    population, housing and industry, the first computer model to simulate a
    whole city's life cycle.
  tags:
    - system dynamics
    - cities
    - feedback
    - policy
    - history
book:
  authors:
    - Jay W. Forrester
  publisher: M.I.T. Press
  year: 1969
  isbn: '9780262060264'
  url: 'https://openlibrary.org/works/OL4504424W'
domains:
  - places
  - people
provenance:
  origin: agent
  sources:
    - title: 'Open Library: Urban dynamics'
      url: 'https://openlibrary.org/works/OL4504424W'
    - title: 'Open Library: Urban dynamics (M.I.T. Press, 1969)'
      url: 'https://openlibrary.org/books/OL5687158M'
    - title: 'Urban Dynamics - Jay W. Forrester, Jay Wright Forrester - Google Books'
      url: 'https://books.google.com/books?vid=ISBN0262060264'
  created: '2026-10-17'
  reviewed: '2026-10-17'
  reviewed_by: 'Claude, from the sources listed'
  status: draft
---
Forrester applied the system dynamics method developed at MIT to a city. The model treats an urban area as a closed system of stocks and feedback loops linking population, housing and industry, simulates a city through growth, maturity and decline over long periods, and then tests the proposed remedies of the day against it. Many of the results ran against accepted policy, which made the book controversial and started a research programme that reached into government urban policy.

It is the first whole-city computer model and the one most later efforts react to. A twin builder will find in it the discipline of stating a system's boundary, stocks and rates explicitly, the habit of testing policies inside the model before outside it, and a clear example of how a model's assumptions decide its conclusions.