i contents section page 1 0 introduction 2 methodology for constructing a tfp index the food chain 3 productivity analysis of 12 sectoral manufacturing wholesaling 15 retailing 18 4 non residential catering 20 5 total factor 22 identification externalities 27 air 30 water 35 land social 36 integrating within 49 conclusions and further research 59 references 62 ii list figures figure title rpi against 8 uk turnover 1998 to 2003 input use 13 inputs output 14 6 7 16