When are some examples of free market fails?

What did Roosevelt did for economy? Do houses get more modern as you move towards the central business district? What was a reason that businesses moved to the South? The law of increasing opportunity costs exists because? What are changes in irrigation in last 30 years? What is the name for a time when the economy is flourishing also referred to as a period of prosperity? What are some examples of commodities in economics? What is the value of a 1939 one ounce fine silver walking liberty silver dollar? What was the Dow at Jan 1 2010? What business models creates a market structure that most closely approximates a market structure of pure competition? What type of researcher studies the relationship between the supply of things we want to buy and the prices we have to pay? How important the phases of business cycle is? What are the four major types of economically based interest groups? Why would you increase supply in labor? What is a macroeconomics question? What is the act of a company concentrating on just a few goods or services called? What is a positive effect of high tariffs? What does outside spending mean? Who was the founder of mixed economy? Why are policy makers more concerned about the financial market than other markets such as the automobile or computer markets?