Cognitive Scaffold

Preparing your thinking workspace

arrow_back_ios_new
MENTAL MODEL · M3697

Downs-Thomson Paradox

Downs-Thomson Paradox
BusinessHigh supportStrategic Management
Included
account_tree

Updated 2026-07-31

Loading revision record…

INTRODUCTION

English translation pending.

CORE DEFINITION

A transport economics result associated with Anthony Downs and J. M. Thomson: in equilibrium the speed of private car travel is set by the average speed of the competing public transport mode. If transit is slow, drivers switch to cars until road congestion makes driving just as slow. It assumes travelers can substitute between modes and that road capacity is not the only binding constraint on the system.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Substitute constraint: identify the substitute alternative that sets your real performance ceiling. - Infrastructure order: improve the slow fallback option before expanding the main channel. - Equilibrium check: ask where users will migrate once you add capacity to the system.

anchor

Anchor fast decisions

Travelers choose between car and transit by comparing door-to-door times. If road expansion shortens car trips, transit riders switch to cars until congestion pushes car times back up toward the transit time, so the improvement is absorbed rather than banked. The equilibrium travel time is pinned by the slower mode, which means the ceiling on road performance is set by transit quality.

MINIMUM ACTION

In progress 0/1

Practice this model in one real situation:

Check to track your progress (stored locally)
Learning progress0%
account_treeGenealogyexpand_more
menu_bookReferencesexpand_more

Source support: Explicit

  • link
    en.wikipedia.orghttps://en.wikipedia.org/wiki/Downs%E2%80%93Thomson_paradoxZH · Explicit
    verified

RELATED MODELS

Related model

Competency Trap

Organizations become so proficient and efficient in a particular skill that they continuously reinforce it, neglecting to explore other more promising alternatives.

arrow_forwardRelated model

Gap Analysis

Gap analysis in management refers to the difference between ideal performance (or potential performance) and actual performance. It can be conducted for an organization or a product. Organizational gap analysis identifies the gap between optimal resource allocation and current allocation, revealing areas for improvement. It involves identifying the gap between business needs and current capabilities, documenting it, and making improvements. As long as expectations for performance in an industry are known, the gap between a company's current performance and ideal performance can be compared; this difference is gap analysis. Similar analysis can be conducted at strategic or operational levels. Gap analysis can be applied at various levels, such as: organization (e.g., human resources), operational direction, business processes, information technology, and compliance with specific standards. Gap analysis can be used to determine the time, money, and manpower needed to achieve a specific goal (e.g., transitioning a payroll process from paper-based to paperless electronic workflow).

arrow_forwardRelated model

Bastiat's Broken Window Fallacy

Mistakenly believing that destruction stimulates the economy, when in fact it is a net loss.

arrow_forward