According to James A Funk's Human Action Theory written in 1932

Depression produces Thrift
Thrift produces Confidence
Confidence produces Investment
Investment produces Activity
Activity produces Prosperity
Prosperity produces Easy Credit
Easy Credit produces Overproduction
Overproduction produces Fictitious Sales
Fictitious Sales produces Fictitious Collateral
and these produce Panic
Panic produces Depression, and
The more things change, the more they are the same.