|aSt. Catharines, Ont. ; |aNew York : |bCrabtree Pub., |c2009
|a32 p. : |bill. (chiefly col.) ; |c29 cm.
|aEconomics in action
|aWhat is supply and demand? -- Needs and wants -- Prices : the law of demand -- Prices and quantity : the law of supply -- The role of competition -- Big picture : the global market -- Things change -- Finding a balance -- The government steps in