Spiller, Pablo T. and Rafael Gely (1992), "Congressional Control or Judicial Independence: The Determinants of U.S. Supreme Court Labor-Relations Decisions, 1949-1988", The RAND Journal of Economics, Vol. 23, No. 4 (Winter), pp. 463-492. [http://www.edegan.com/pdfs/Spiller%20Gely%20(1992)%20-%20Congressional%20Control%20or%20Judicial%20Independence.pdf pdf]