The goods for which demand increases when income increases, and falls when income decreases but price remains constant, i.e. with a positive income elasticity of demand are known as:
An inferior good is a good whose quantity demanded decreases when consumer income rises (or quantity demanded rises when consumer income decreases). In economics, a luxury good (or upmarket good) is a good for which demand increases more than proportionally as income rises Necessity Goods are those goods for which demand increases proportionally less than income.
