Law Of Supply And Demand Curves Examples Effect On Price . A given good as determined by supply and demand curves. In microeconomics, supply and demand is an economic model of price determination in a market.it postulates that, holding all else equal, in a competitive market, the unit price for a particular good, or other traded item such as labor or liquid financial assets, will vary until it settles at a point where the quantity demanded (at the current price) will equal the quantity. from venturebeat.com A given good as determined by supply and demand curves. The law of supply and demand explains the interaction between the supply of and demand for a resource, and the effect on its price. In microeconomics, supply and demand is an economic model of price determination in a market.it postulates that, holding all else equal, in a competitive market, the unit price for a particular good, or other traded item such as labor or liquid financial assets, will vary until it settles at a poi...