David Andolfatto and Larry White have been having an interesting debate on the public finance case for having a large (or small) Federal Reserve balance sheet. In this post I'll make the case that American taxpayers are better off having a large Fed balance sheet, perhaps not as big as it is now, but certainly larger than in 2008. To explain why, we're going to have to go into more detail on some central banky stuff. The chart below illustrates the growth of the Fed's balance sheet. Prior to the 2008 credit crisis, the Fed owned around $900 billion worth of assets (green line), these being funded on the liability side by $800 billion worth of banknotes (red line), a slender $10-15 billion layer of reserves (blue line), and a hodgepodge of other liabilities. The Fed now owns an impressive $4.5 trillion in assets. These are funded by around $1.5 trillion worth of banknotes and $2.3 trillion worth of reserves. So the lion's share of the increase in the Fed's assets i...