The first global financial bubble in stock prices occurred 1720 in Paris, London and the Netherlands. Explanations for these linked bubbles primarily focus on the irrationality of investor speculation and the corresponding stock price behavior of two large firms: the South Sea Company in Great...

There is a demand for safe assets, either government bonds or private substitutes, for use as collateral. Government bonds are safe assets, given the government's power to tax, but their supply is driven by fiscal considerations, and does not necessarily meet the private demand for safe assets....

We document that the percentage of all U.S. assets that are "safe" has remained stable at about 33 percent since 1952. This stable ratio is a rare example of calm in a rapidly changing financial world. Over the same time period, the ratio of U.S. assets to GDP has increased by a factor of 2.5,...

Short-term collateralized debt, such as demand deposits and money market instruments - private money, is efficient if agents are willing to lend without producing costly information about the collateral backing the debt. When the economy relies on such informationally-insensitive debt, firms...

Privately-produced safe debt is designed so that there is no adverse selection in trade. This is because no agent finds it profitable to produce private information about the debt's backing and all agents know this (i.e., it is information-insensitive). But in some macro states, it becomes...

"After the financial crisis of 2007-2008, analysts continue to question the security of banking sectors in nations in Europe, Latin America, Asia, and Africa. Why do such crises recur? What is it about the accumulation of bank debt that potentially jeopardizes national and global banking...

Measured over long horizons, the correlation between stocks and commodities is close to zero. However, it varies widely over time. Using historical data extending back to 1960 we study the stock-commodity correlation and show: (1) Stock-commodity correlation has a business-cycle component: it is...

Measured over long horizons, the correlation between stocks and commodities is close to zero. However, it varies widely over time. Using historical data extending back to 1960 we study the stock-commodity correlation and show: (1) stock-commodity correlation has a business cycle component: it is...