A diagrammatic exposition of weak complementarity and the Willig condition

V. Kerry Smith, H. Spencer Banzhaf

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


This article provides a graphical explanation for one of the most important restrictions to utility functions used in revealed preference approaches for measuring the demand for public goods and product quality-weak complementarity. It also describes how the Willig condition is an important element along with weak complementarity in measuring Hicksian consumer surplus for changes in public goods or quality using Marshallian demand curves.

Original languageEnglish (US)
Pages (from-to)455-466
Number of pages12
JournalAmerican Journal of Agricultural Economics
Issue number2
StatePublished - May 2004


  • Consumer surplus
  • Public goods
  • Weak complementarity

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Economics and Econometrics


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