Exchange Traded Funds 101

I have written some short articles on ETFs trying to discuss potential liquidity problems, some inappropriate structures, and trading costs (as opposed to buying and holding) and I have some more articles planned as I have time to write.

The newest edition of the Journal of Economic Perspectives has an interesting article, which is linked in my Daily Research Links available to subscribers, entitled "Exchange-Traded Funds 101 for Economists".  While the article addresses structure and types of funds, liquidity, trading implications,

Estimating Potential GDP and Output Gap

 I have been very interested  in output gap estimating and researching the issue, because there are economic theory conflicts which muddy what governmental fiscal policy should be.  While I have not had the time to pull my research together in an article, I continue to follow the subject and add to my research.

The CBPP has a new paper out entitled "Real-Time Estimates of Potential GDP: Should the Fed