However, demand is the willingness and ability of a consumer to purchase a good "under the prevailing circumstances"; so, any circumstance that affects the consumer's willingness or ability to buy the good or service in question can be a non-price determinant of demand.
However, demand is the willingness and ability of a consumer to purchase a good "under the prevailing circumstances"; so, any circumstance that affects the consumer’s willingness or ability to buy the good or service in question can be a non-price determinant of demand.