Financial contracts are complicated and consumers often do not grasp them in their entirety. This may lead to financial mistakes. We develop a quantitative theory of unsecured credit and equilibrium default in a market with sophisticated and naïve borrowers who sometimes misunderstand their...

"Collateral damaged" explains how America had turned from a nation of savers into a nation of consumers addicted to debt. Wall Street then used that addiction to create "toxic securities" that threaten to bring about the collapse of the global economy. How can America get its fiscal house in...