In a recent speech given at the University of South Alabama, Federal Reserve Bank of Atlanta President Dennis Lockhart added his voice to what is now the general consensus: "I agree with all who are declaring that a technical recovery is under way."

There is still much work to be done, of course, not least the continuing examination of just what led to the recession and how a repeat performance can be avoided. One theme of this examination appeared in last week's Financial Times:

"It is certainly true that the most recent bubble, its bursting and the Fed's actions in the aftermath have inspired existing critics and recruited new ones. The first charge is that interest rates under Alan Greenspan, (current Fed Chairman Ben) Bernanke's predecessor, were kept too low for too long, contributing to a bubble of easy credit."

Here is an exercise that that I find intriguing. Suppose we try to estimate, as closely as we can, the actual interest rate decisions of the Federal Open Market Committee (FOMC) over the period spanning the beginning of Greenspan's tenure to the present. It turns out that by using an approach based not only on measures of inflation and actual output relative to potential but also on the lagged fed funds rate, you can actually get pretty darn close to statistically describing what the FOMC did:

I'm going to resist the temptation to call this approach a "Taylor rule." The estimating "rule" used here does in fact include realizations of inflation and a measure of the output gap (that is, a measure of how different gross domestic product is from its potential). These are the essential ingredients of the Taylor rule, but not the source of the close fit evident in the chart above. Over the period covered by the chart, you could have done a pretty good job mimicking the actual federal funds rate outcomes in any given month using knowledge of the previous month's rate.