Paul Geroski, Stepana Lazarova, Giovanni Urga, and Chris Walters, "Are Differences in Firm Size Transitory or Permanent?", Journal of Applied Econometrics, Vol. 18, No. 1, 2003, pp. 47-59. The tab-delimited ASCII datafile gluw.data contains 44,041 annual observations on an unbalanced panel of 3,266 UK-registered firms with at least 5 continuous observations from 1955-1985. The data are taken from the well-known DTI-Meeks-Whittington data and are described fully in the appendix to the paper. Missing data are identified only by the presence of tabs. The last line of the file contains the variable names. The data file, which is in DOS format, is zipped in the file gluw-data.zip. Unix users should unzip it with "unzip -a". Each company is identified by its name "comp" and a unique code, "ts". The variables are all taken from each firm's annual financial report and accounts. "oprof" and "sales" are each firm's operating profits and sales turnover: Data on these variables are very limited, and they are not used in the analysis. "asset" is each firm's total net assets, taken from its annual balance sheet. When normalised on an implied, seasonally-adjusted deflator ("gdfcfpi") - the Gross Domestic Fixed Capital Deflator, Price Index - taken from the UK CSO's Blue Book, "asset" is the measure of firm size used in our analysis. Each firm's industry (according to the UK 1980 Standard Industrial Classification) is given in "industry". These variables are in 4 columns ordered by "ts" and "year".