Elasticity refers to the sensitivity of demand or supply for a particular good or service to changes in its price, income, or other factors. The determinants of elasticity of demand or supply are the factors that affect the degree of responsiveness of demand or supply to changes in these factors. The most important determinants of price elasticity of demand include price, time, and availability of alternatives. The price elasticity of demand tends to be higher when there are close substitutes for the good or service, when consumers have more time to adjust to price changes, and when the price represents a larger portion of the consumer's income. Other factors that may influence the elasticity of demand include the availability of credit, advertising, and changes in tastes and preferences. The determinants of elasticity of supply are similar to those of demand and include price, time, and technology changes. When prices are high, producers have an incentive to increase production, but this response depends on the time needed to adjust production levels and the availability of resources and technology.