@TechReport{shpitser:pea09-r349L,
  author =       "Shpitser, I. and Pearl, J",
  title =        "Effects of Treatment on the Treated: Identification 
                  and Generalization",
  institution =  "Department of Computer Science, University of California,
                  Los Angeles",
  address =      "CA",
  year =         2009,
  number =       "R-349L, {$<$http://ftp.cs.ucla.edu/pub/stat\_ser/r349-ett-long.pdf$>$}",
  note =         "Extended version of paper that appeared in UAI-09"
}