The microprocessor readsa one or zero by detecting the flow of electrons between the magnetic layers of each sandwich.

FORBES: Total Recall

But Cochrane finds that cash flow variation accounts for approximately zero percent of market variation.

FORBES: John Cochrane's Unpleasant Fiscal Arithmetic

This simple double entry book keeping shows that the net cash flow into the economy produced by government spending is zero, nada, nothing.

FORBES: Job Creation, Economic Growth And Social Justice