A Giffen good is a low-income, non-luxury product that defies standard economic and consumer demand theory. Demand for Giffen goods rises when the price rises and falls when the price falls. In econometrics, this results in an upward-sloping demand curve, contrary to the fundamental laws of demand which create a downward-sloping demand curve.
The term "Giffen goods" was coined in the late 1800s, named after noted Scottish economist, statistician, and journalist Sir Robert Giffen.
The concept of Giffen goods focuses on low-income, non-luxury products that have very few close substitutes.
Giffen goods can be compared to Veblen goods which similarly defy standard economic and consumer demand theory but focus on luxury goods.

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