What Do We Learn from Unit Roots in Macroeconomic Time Series?
AbstractIt is often argued that the presence of a unit root in aggregate output implies that there is no "business cycle": the economy does not return to trend following a disturbance. This paper makes this notion precise, but then develops a simple aggregative model where this relation is contradicted. In the model output both has a unit root, and displays repeated short-run fluctuations around a deterministic trend. Some summary statistical evidence is presented that suggests the phenomena described in the paper is not without empirical basis.
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Bibliographic InfoPaper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 2450.
Date of creation: Nov 1987
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Other versions of this item:
- Danny Quah, 1987. "What Do We Learn from Unit Roots in Macroeconomic Time Series?," Working papers 469, Massachusetts Institute of Technology (MIT), Department of Economics.
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