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Nowcasting US GDP: The Role of ISM Business SurveysKajal LahiriState University of New York (SUNY) at Albany, College of Arts and Sciences, Economics George MonokroussosState University of New York at Albany, College of Arts and Sciences, Economics November 2011 International Journal of Forecasting, Forthcoming Abstract: We study the role of the well-known monthly diffusion indices produced by the Institute for Supply Management (ISM) in nowcasting current quarter U.S. GDP growth. In contrast to the existing literature on ISM surveys, we investigate their marginal impact on these nowcasts when large unbalanced (jagged edge) macroeconomic data sets are used in real time to generate them. We find evidence that these ISM indices are helpful in improving the nowcasts when new ISM information becomes available in the beginning of the month, ahead of other monthly indicators. Furthermore, and while the existing literature has focused almost exclusively on manufacturing information, here we establish the increasingly significant role of the recently created non-manufacturing ISM diffusion indices in such nowcasting contexts.
Number of Pages in PDF File: 33 Keywords: Forecasting, ISM, PMI, NMI, factor models, Kalman filter, Real time data JEL Classification: C33, C53 Accepted Paper SeriesDate posted: May 30, 2012Suggested CitationContact Information
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