Safe assets are demanded to smooth consumption across states (both intertemporally and in cross-section). Some of these assets are supplied publicly (government bonds) and some are created and supplied privately (such as mortgagebacked securities and asset-backed securities). Private assets are...

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...