We summarize some methods useful in formulating and solving Hansen-Sargent robust control problems, and suggest extensions to discretion and simple rules. Matlab, Octave, and Gauss software is provided. We illustrate these extensions with applications to the term structure of interest rates, the...

According to the classical view, an economy's lender of last resort should be its central bank. For brief periods of time, the bank might suspend convertibility in order to provide the liquidity needed to support the domestic credit market. Recent experience of financial crises demonstrates the...