I've heard of Hayek(heard him mentioned on biz channel here LOL, they probably don't know his beliefs

) and Friedman.
I used to support the classic school of economics, i.e. keep the govt out of the economy in bad times, and let the prices and wages and so on adjust so that the economy will recover and be in full employment again.
The Free-ed videos made me think a bit. John Maynard Keynes's theories do make some sense. In one of the videos, it talked about the Aggregate Demand curve(AD), the Short Run Aggregate Supply curve(SRAS), the Long Run Aggregate Supply curve(LRAS). The SRAS and AD adjust like regular supply and demand curves. The LRAS is a straight line in the long term, which symbolizes the long term production capacity of the economy.
When the SRAS and AD are NOT at equilibrium, a recessionary gap or something is caused. When aggregate supply moves to the left corner and aggregate demand stays still, then a recessionary gap is created(think 1930s Great Depression). When it moves towards the upper left corner, then something like the 1970s stagflation is seen.
Keynes thought that during these difficult times, the government should intervene with the economy.
Well, Roosevelt surely did a very poor job. He fixed wages etc. Normally, when there is an inflation, wages and prices fall. But by doing so, he made more people lose jobs etc.
The Federal Reserve also doubled the reserve requirement for banks in the early 1930s, when 1/3 of the US banks were failing. Perhaps a better idea would be to increase liquidity and add money to the system.(But they refused to do that)
Note that the US govt didn't act on Keynes recommendations(Keynes actually wrote a letter to the FDR on that topic)
It does indeed seem that during different times, different policies are needed. When aggregate demand falls short, if the govt can increase that demand then, it will avert a recession. Yet big govt doesn't seem like a good option either.
Anyways, economics does seem intriguing. I'll probably read more on that... Watched like 2 hrs of those videos yesterday, finished my homework at 1 AM ROFL.(Very addictive site Scott)