Financial Crisis

"There is nothing like crisis that focus people's mind." I love this quote. Crisis force us to find out what's been not working, for most people stick the rule of don't-fix-it-if-it-works.

The financial crisis has generated tons of discussion in econ blogsphere, and it's been never a more exciting time for economists, especially Macroeconomists. A lot of established economic models or a whole school of thought are called into question. Here are some topics I am interested in:

1. How much regulation is optimal in financial system?
2. Is financial engineering the biggest scam ever in history?
3. Is monetary policy still effective when facing zero interest rate?
4. Is Keynesian or New Keynesian school coming back?
5. Is Real Business Cycle dead?