Frank A. Wolak, "Quantifying the Supply-Side Benefits of Forward Contracting
in Wholesale Electricity Markets", Journal of Applied Econometrics, Vol. 
22, No. 7, 2007, pp. 1179-1209.

There are three ASCII files that contain the data used in this paper. All
three files, which are in DOS format, are zipped in the file wolak-data.zip.

The first file is called macfile2.asc. This file has the bid and output data
for firm A.  Each row of the file contains the following columns: date, gen
period, band, pbid, qbid, disp, totdisp, sysdem, sysdemmod, poolp, ind.

date:  The date of the observation
gen: The generation unit identifier for that observation
     (firm A owns seven units) 
period:  The half hour of the day (1-48) (Recall that period 1 is 4:00 am
         to 4:30 am and period 48 is 3:30 am to 4:00 am the following day)
band:  Step in the bid increment (1-10)
pbid:  Price bid for that band for that half-hour period
qbid:  Quantity increment bid for that band for that half-hour period
disp:  Quantity produced in MW by a specific generator for that day and
       half-hour period
totdisp: Total production in MW by firm A during half-hour period
sysdem:  System demand in MW for that half-hour period
sysdemmod: Modified system demand in MW for that half-hour period
poolp: Market price for that  period
ind:  Indicator variable not used in analysis

The second file is called otherfile1.asc. This file contains the bidding
information for all of the other firms that make up SO(p) in the notation of
the paper.  Each row of the file contains the following columns:
date/period/band/pbidfa/qbidfa.

date:  The date of the observation
period: Half-hour period of the day (1-48)
band:  Step in the bid increment (1-10)
pbidfa: Price bid for that half-hour associated with that increment
qbidfa: Corresponding increment quantity bid for that half-hour associated
        with that increment

The third file is maccover.dat. This file contains fixed-price forward
contract position of firm A. Each row of the file contains the following
columns: covdate/period/coverq/coverp.

covdate:  The date of the observation
period: The half hour of the day (1-48) 
coverq:  The forward contract quantity for that day and half-hour period
coverp: The forward contract price for that day and half-hour period