Macroeconomics 20th Edition by Campbell McConnell ,Stanley Brue ,Sean Flynn

تمرين 29

Go to the Web site of the Energy Information Administration,http://www.eia.doe.gov , and follow the links to find the current retail price of gasoline. How does the current price of regular gasoline compare with the price a year ago? What must have happened to either supply, demand, or both to explain the observed price change?