Evidence for the OECD countries show that the “great ratios”, such as the unemployment rate, factor shares, Tobin’s q and the investment-capital ratio, fluctuate significantly on medium-term frequencies of 10-40 years duration. To explain these medium-term fluctuations, we establish a...

Empirical tests of the Fisher hypothesis give conflicting results, regardless of whether income growth is accommodated in the estimates. This paper shows theoretically and empirically that standard methods of testing the Fisher hypothesis give biased results and that the bias depends on the...

The sharp increase in equity prices over the 1990s was widely attributed to permanently higher productivity growth derived from the New Economy. This paper establishes a rational expectations model of technology innovations and equity prices, which shows that under plausible assumptions,...