Vacations in us for Microeconomic analysis. One of the pillars of microeconomic price theory (as developed by Alfred MARSHALL) is the law of supply: all things being equal, the quantity of a good supplied rises as the market price rises, and falls as the price falls. A supply curve of a firm is therefore positively sloped. In standard models of supply (and all other things not being equal), the dependent variable (i.e., the amount supplied) is typically a function of a number of independent variables: the good’s own price; the prices of inputs used in its production; the technology of production; taxes and subsidies; and expectations of future prices and costs. If PRICE changes, the quantity supplied will change along the supply curve; if, however, one of the other determinants changes, the supply curve shifts. Vacations in us 2016.