@TechReport{pearl:18-r483,
  author = 	 "Pearl, J.",
  title = 	 "Does Obesity Shorten Life? Or is it the Soda? 
  		  On Non-manipulable Causes",
  institution =  "Department of Computer Science, University of California, 
                  Los Angeles",
  address = 	 "CA",
  year = 	 2018,
  number =	 "R-483, {$<$http://ftp.cs.ucla.edu/pub/stat\_ser/r483.pdf$>$}",
  note =	 "Forthcoming, {\em Journal of Causal Inference}"
}