Question

If consumer has rational, monotonic and convex preferences, which of the following is true concerning the substitution effect of a decrease in price of good X.
A) It always will lead to an increase in consumption of good X.
B) It will lead to an increase in consumption of good X only if X is a Giffen good.
C) It will lead to an increase in consumption of good X only if X is an inferior good.
D) It will lead to an increase in consumption of good X only if X is a normal good.

Answer 1

Answer:

It will lead to an increase in consumption of good X only if X is a normal good ( D )

Explanation:

If consumer has rational, monotonic and convex preference the decrease in price of good X will lead to an increase in consumption of good X only if X is a Normal good .

This is because the demand for Normal goods increases with increase in consumers income. therefore a decrease in price will automatically lead to an increase in demand because of the increase in the purchasing power of the consumer's income.