Explain four circumstances that would cause a commodity to have inelastic demand.

Here are four circumstances that would cause a commodity to have inelastic demand:

1. Necessity: Goods that are considered necessities (e.g., basic food, essential medicines) tend to have inelastic demand. Consumers will continue to purchase these items even if their prices increase significantly because they are essential for daily life or well-being.
2. Lack of close substitutes: If there are few or no close substitutes available for a commodity, consumers have limited alternatives when its price changes. This lack of options makes their demand for the original good relatively unresponsive to price fluctuations.
3. Small proportion of income: When a good represents a very small proportion of a consumer's income (e.g., salt, matches), a change in its price will have a negligible impact on their overall budget. Consequently, consumers are less likely to alter their purchasing habits, leading to inelastic demand.
4. Short time period: In the short run, consumers often have less time to adjust their consumption patterns or find substitutes for a good. This limited adjustment period means that demand tends to be more inelastic immediately after a price change, becoming more elastic over a longer period as alternatives are explored.