@Article{pearl:15-r391,
  author = 	 "Pearl, J.",
  title = 	 "{Trygve Haavelmo} and the emergence of causal calculus",
  journal =  	 "Econometric Theory",
  volume =       "31",
  issue =        "1",
  year =         2015,
  pages =        "152--179",
  note = 	 "Special issue on {Haavelmo} Centennial" 
}