Firstly, the Great Depression of the 1930s has helped prove the importance of government’s intervention on the economy in the past. The Great Depression started with a decrease in stock prices in America and then quickly spread to most parts of the world (McElvaine, 1993, p 59). There was a tremendous decrease on the demand and global trade, followed by high unemployment rate. As a result, various measures were taken by governments worldwide in an attempt to accelerate the economy’s recovery and reduce the unemployment rate including stimulation on demand by spending much more than they took in (Fox, 2008, p 1).
At the final several years of the Great Depression, Keynesian macroeconomic theory, which shows the importance of government’s role on the economy, has played an impact on interventionists’ policies. In Keynesian economics, when inefficient economic outcomes aroused from decisions of private sector, public sector needs to take active measures. By fiscal policy adjusting taxes and government spending and monetary policy which deals with the amount of money supplied and credit, government could help stabilize the economic growth rate, and then plays an impact on price level and employment rate in the process (Congdon, 2007, p 169). In the case of the Great Depression, Keynes said the low unemployment rate were the result of