Finding money, stocks, and inflation too restrictively well-documented, the authors fled to subjects the principles of the dismal science were never before bent to fit. Thanks to this shrewdness, no one could safely call them foul for their predictions on the fluctuations in value of prison cigarettes against the knife standard, or rebut their theories on how the fear of AIDS infection affects army enlistment. Free from the assaults of critics, the authors were free to promulgate their ideas, not to mention make bank-loads of money.