One of Engel's laws says the percentage spent on housing, household operations, and clothing remains constant. In recent years, however, this has been challenged. In fact, the percentage of income spent on these items has increased over the years.

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Engel's law states that the percentage of income spent on housing, household operations, and clothing decreases as income increases. However, the passage states that this law has been challenged in recent years, and that the percentage of income spent on these items has actually increased.

One of Engel's Laws Says the Percentage Spent on Housing