Keyword: Rivalness

Term to classify goods
• Rival: If consumed by one not available for a second
  • Example: Food
  • Rival goods can be limited
  • Abundance of a rival good makes rivalness less important
• Non-rival: Each consumption is independent of each other
  • Example: Information, sunlight
  • Inherently not limited
  • Scarcity must be imposed by external means
• Anti-rival: The good is more useful if it is consumed by many
  • Happens through network effects
  • Example: Telephone
• Markets of material goods are based on rival goods

Free Software is an anti-rival good