Diamond and Kashyap, professors in finance and economics at the University of Chicago, show how the tax on banks proposed by the Obama administration can be executed. It would raise $90 billon over 10 years and offset the $117 billion in losses expected from the TARP program. They say the tax should be made on the size of each bank before the fall of Lehman Brothers so that banks cannot shrink their way out of the tax by engaging in sham accounting transactions. They say the banks have responded to the crisis by engaging in behaviours that have exacerbated the crisis by becoming reluctant to lend, and not renewing loans. Its like having the banks pay for the insurance policy that keeps them from sinking.