Depending on consumer or market indifference curves, the amount of a good bought can either increase, decrease, or stay the same when income increases. The shift in consumer demand for an inferior good can be explained by two natural economic phenomena: The substitution effect and the income effect.
Distinguish between a normal and an inferior good using examples from the leisure and tourism sector. Show the changes in the demand for tourism as the income of a tourist grows when tourism is perceived to be normal good and inferior good.