text: For more information on multifactor productivity , see Productivity Business Sector and Major Subsectors , BLS Handbook of Methods , Bureau of Labor Statistics ( April 1997 ) , pp. 89-98 ; and Edwin R. Dean and Michael J. Harper , The BLS Productivity Measurement Program , Bureau of Labor Statistics ( July 5 , 2000 ) , paper presented to the NBER Conference on Research in Income and Wealth on New Directions in Productivity Analysis , March 20-21 , 1998 .
  
  ###
  
  A paper on multifactor productivity was presented by Edwin Dean and Michael Harper .