Norman Offstein, "An Extortionary Guerrilla Movement",
Journal of Applied Econometrics, Vol. 22, No.6, 2007, pp. 995-1011.

The data on pipeline attacks, oil production and other variables related
to the guerrilla behavior were created from data provided the Colombian
oil company Ecopetrol.  The oil price information was collected online
from the United States Department of Energy website.  The data span from
January 1986 to December 1997.

All data files are contained in the zip file guerrdat.zip. Text files
are ASCII files in DOS format. With the variables, all of the tables and
results in the paper can be reproduced. 


File: atkdata.txt

This file contains three variables, source Ecopetrol
Number = numbered attack sequence, 1 to 498
Date = date of the attack
Spill = spill size in barrels, where zero indicates
the attack did not spill


File: oilprod.txt

This file contains monthly oil production information for wells on the
Caño-Limón oil field from January 1986 to December 1997.  Quantity in
barrels.


File: estdata.txt

This file contains the variable names and definitions of 144 monthly
observations from January 1986 -- December 1997

nomwop = nominal monthly oil price (from USDOE)
wop = real monthly oil price in 1982 US dollars
rep = guerrilla reputation, as defined in the paper
totatk = total monthly pipeline attacks
binatk = binomial pipeline attack decision, 0 = no
attack, 1 = attack
ocpay = oil company pay decision vector, 0 = not pay
extortion demand, 1 = pay


File: allvarsdata.xls

This file contains all of the variables of the above three files, but in
one file.  This may easier for those interested in manipulating the date
format of the attack information.