@TechReport{pearl:14-r431-L,
  author = 	 "Pearl, J.",
  title = 	 "Causes of Effects and Effects of Causes",
  institution =  "Department of Computer Science, University of California, 
  		  Los Angeles",
  address = 	 "CA",
  year = 	 2014,
  number =	 "R-431-L, {$<$http://ftp.cs.ucla.edu/pub/stat\_ser/r431-L.pdf$>$}",
  note =         "Short version forthcoming, Journal of Sociological Methods and Research"
}