The five-year mean global temperature has been flat for the last decade, which we interpret as a combination of natural variability and a slow down in the growth rate of net climate forcing.

FORBES: Yes! We Should Defund The U.N.'s Intergovernmental Panel On Climate Change

Theory and practice both tell us that printing money cannot generate economic growth or lower the natural rate of unemployment, but it can cause inflation.

FORBES: The Limits Of Monetary Policy Call For Moral, Sound Money

In theory the natural rate will tend towards the expected nominal growth rate of the economy, so you want to keep that at zero.

FORBES: How To Keep Zero Interest Rates Forever

My good friend and sometime mentor, Brian Wesbury, argues that the natural rate of interest is the same as the nominal GDP growth rate.

FORBES: What Is the Liquidity Premium? What Does It Mean?