Stephen G. Donald, Harry J. Paarsch, and Jacques Robert, "An Empirical Model of the Multi-Unit, Sequential, Clock Auction", Journal of Applied Econometrics, Vol. 21, No. 8, 2006, pp. 1221-1247. Data are in the file dpr-data.txt, which is an ASCII file in DOS format. It is zipped in the file dpr-data.zip. Unix users should use "unzip -a". Our data set contains information on 37 multi-unit auctions held weekly between May 6, 1993 and May 12, 1994. All but three of the weeks had more than one lot supplied. The data are organized as a (308x11) table of data where each row is an auction:unit combination and each column is an identifier or a variable. The variables are in the following order: idate nlot lot code vol res win idw n totvol date where idate = date of auction; nlot = number of lots for sale; lot = lot number; code = product code; vol = volume of lot; res = total reserve price of lot; win = total winning bid of lot; idw = id number of the winner; n = number of participants; totvol = total volume for sale; date = date of lot sale. Below, we describe in detail the identifier and each variable. idate: The calendar date of the auction as a 6-digit number. Thus, 930506 means May 6, 1993. nlot: The number of lots for sale at the specific auction. Thus, 8 would mean that 8 lots were for sale. lot: The lot number of this particular observation. Thus, 2 would mean that this was the second lot sold. code: The product code. 4403 is sawlogs. It is always the same in this data set. vol: The volume in this particular lot. Thus, 1000 would mean that the lot size was 1000 cubic metres of timber. res: The reserve price for this particular lot. Thus, this will be the product of volume per lot and either 1500 or 2500 Roubles. Only two per-unit reserve prices were used. win: The winning bid for this particular lot. Thus, this will be the product of volume per lot and the winning price per cubic metre. idw: The identification number of the winner. Thus, 71 would mean that this is the unique identifier of a bidder at an auction. These are not comparable across the 37 auction observations we have. They are only unique within an auction. n: The number of participants at the auction. Thus, 6 would mean six people purchased the white cards at the auction. totvol: The total volume over all lots for sale at a particular auction. Thus, 30000 would mean that a total of 30,000 cubic metres of permits were sold at that auction. date: The date of the lot sold at auction. This is a generated number, starting with the day number of 1993, and incremented by 0.2 for each lot sold. Thus, May 6, 1993 is day 126, and the first lot sold is 126.2, while the second lot sold is 126.4, and so forth. For additional questions, please contact: Harry J. Paarsch Department of Economics Henry B. Tippie College of Business 108 Pappajohn Business Building University of Iowa 21 East Market Street Iowa City, IA 52242-1000 USA Telephone: (319) 335-0936 Facsimile: (319) 335-1956 e-mail: hjp [AT] paarsch.biz.uiowa.edu