00676nam0-22002531i-450-990003234570403321000323457FED01000323457(Aleph)000323457FED0100032345720000920d--------km-y0itay50------baitaITWhat Is ProductivityCapacity or Welfare Measurement?Charles R. HultenWorking paper seriesNBER3970Hulten,Charles R.ITUNINARICAUNIMARCBK990003234570403321PaperSESSESWhat Is Productivity448783UNINAING01