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Multifactor Keynesian Models of the Long-Term Interest Rate

This paper presents multifactor Keynesian models of the long-term interest rate. In recent years there have been a proliferation of empirical studies based on the Keynesian approach to interest rate modeling. However, standard multifactor models of the long-term interest rate in quantitative finance have not been yet incorporated Keynes’s insights about interest rate dynamics. Keynes’s insights about the influence of the current short-term interest rate are introduced in two different multifactor models of the long-term interest rate to illustrate how the long-term interest rate relates to the short-term interest rate, the central bank’s policy rate, inflation expectations, the central bank’s inflation target, volatility in financial markets, and Wiener processes.