Dick van Dijk, Philip Hans Franses and Andre Lucas, "Testing for ARCH in the Presence of Additive Outliers", Journal of Applied Econometrics, Vol. 14, No. 5, 1999, pp. 539-562. The data which is used in this paper is contained in the file MACROUSA.DAT. The dataset comprises 15 post-World War II US macroeconomic time series. The series, in the order in which they appear in MACROUSA.DAT (by column) and preceded by their CITIBASE code (from which the series were obtained), are: FM1 M1 FM2 M2 FMBASE monetary base FSPCOM S&P 500 stock price index FYAAAC yields on AAA bonds GCQ real consumption GD GNP deflator GIFQ real fixed investment GNPQ real GNP IP industrial production LCPM nominal compensation per hour in manufacturing LHEM civilian non-institutional employment LHUR unemployment rate LOUTM labour productivity in manufacturing PUNEW consumer price index The data are quarterly and generally cover the period 1947Q1-1993Q4, or 188 observations. Exceptions are the unemployment rate and employment series which span 1948Q1-1993Q4, M1 and M2 which span 1959Q1-1993Q4, and real GNP and the GNP deflator which span 1947Q1-1993Q3. Missing values are indicated with dots. All series in MACROUSA.DAT are in logs, except for the unemployment rate which appears in levels. Note that the analysis in the paper is based on the first differences of logs for all series except the unemployment rate, which is analyzed in first differences. The same date have been analyzed in Nathan S. Balke and Thomas B. Fomby (1994) Large shocks, small shocks, and economic fluctuations: outliers in macroeconomic time series, Journal of Applied Econometrics 9, 181-200. Dick van Dijk Email: djvandijk@few.eur.nl Homepage: http://www2.tinbinst.nl/~djvdijk Tinbergen Institute Erasmus University Rotterdam P.O. Box 1738 NL-3000 DR Rotterdam The Netherlands phone: +31-10-4088928 fax: +31-10-4527347