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Journal Article
Residual seasonality and monetary policy
Much recent discussion has suggested that the official real GDP data are inadequately adjusted for recurring seasonal fluctuations. A similar pattern of insufficient seasonal adjustment also affects the published data for a key measure of price inflation. Still, such residual seasonality in the published output and inflation statistics is unlikely to mislead Federal Reserve policymakers or adversely affect the setting of monetary policy.
Journal Article
Seasonal revisions
Report
Periodic linear-quadratic methods for modeling seasonality
Optimal linear regulator methods are used to represent a class of models of endogenous equilibrium seasonality that has so far received little attention. Seasonal structure is built into these models in either of two equivalent ways: periodically varying the coefficient matrices of a formerly nonseasonal problem or embedding this periodic-coefficient problem in a higher-dimensional sparse system whose time-invariant matrices have a special pattern of zero blocks. The former structure is compact and convenient computationally; the latter can be used to apply familiar convergence results from ...
Working Paper
A neoclassical model of seasonal fluctuations
Working Paper
Forecasting and seasonal adjustment
An examination of whether one should seasonally adjust data before developing multivariate time series models to provide forecasts.
Journal Article
The problem of seasonally adjusted money
An essay on the effect that seasonal money supply fluctations have on the measurement of M1 and on Federal Reserve money supply management, with a discussion of the X-11 adjustment method and suggestions for improving it.
Working Paper
Rational seasonality
Seasonal adjustment usually relies on statistical models of seasonality that treat seasonal fluctuations as noise corrupting the `true' data. But seasonality in economic series often stems from economic behavior such as Christmas-time spending. Such economic seasonality invalidates the separability assumptions that justify the construction of aggregate economic indexes. To solve this problem, Diewert(1980,1983,1998,1999) incorporates seasonal behavior into aggregation theory. Using duality theory, I extend these results to a larger class of decision problems. I also relax Diewert's assumption ...
Journal Article
A problem of seasonal adjustment
A discussion of how new financial instruments have made accurate seasonal adjustment of monetary data more difficult since 1980.
Working Paper
Institutional investors, analyst following, and the January anomaly
Studies have documented that average stock returns for small, low-stock-price firms are higher in January than for the rest of the year. Two explanations have received a great deal of attention: the tax-loss selling hypothesis and the gamesmanship hypothesis. This paper documents that seasonality in returns is not a phenomenon observed only for small firms' stock or those with low prices. Strong seasonality in excess returns is reported for a sample of widely followed firms. Sample firms have unusually low excess returns in January, and returns adjust upward over the remainder of the year. ...