Williamson P. (1998)  ‘Estimating and projecting private household water demand for small areas’, International workshop on microsimulation in the new millenium: challenges and innovations, Cambridge, 22-23 August

 Williamson P. (1998)  ‘Household projection in a static microsimulation context’, International Geographical Union Conference on Models, Methods and Theory in Population Geography, Dundee, 26-28 August.

 Williamson P. (1999) ‘Microsimulation: an idea whose time has come?’, 39^th European Congress of the European Regional Science Association and the Regsional Science Association International, Dublin, 6-8 September 1999.

 Voas D. and Williamson P. (1999) ‘The diversity of diversity: a critique of geodemographic classification’, British Society for Population Studies Annual Conference, Dublin, September 1999.

 Voas D. and Williamson P. (2000) ‘An evaluation of the combinatorial optimisation approach to the creation of synthetic microdata’, RGS-IBG Annual Conference, University of Brighton, Sussex, January 2000.

 Voas D. and Williamson P. (2000) ‘An evaluation of the combinatorial optimisation approach to the creation of synthetic microdata’, paper presented at the conference Census of Population: 2000 and beyond, University of Manchester, Manchester, June 2000.

 Williamson P. and Voas D. (2001) ‘Geodemographic profiles: a re-evaluation in the light of data from the Census Rehearsal’, Quantitative Methods Study Group, RGS-IBG Annual Conference, University of Plymouth, Plymouth 2-5 January 2001.

 Williamson P. and Huang Z. (2001) ‘Adding spatial detail to Public Use Microdata – a synthetic approach’, Spatial Analysis and Modelling Special Interest Group, American Association of Geographers Annual Conference, New York, 27 Feb. to 3 March 2001.

 Williamson P. (2001) ‘Spatial microsimulation: adding geography to microdata’, Seminar presentation to SAGE/Dept. of Social Security, London School of Economics, October 2001.

 Williamson P. (2001) ‘Taking account of place when imputing income in the SARs’, What have we learned from the SARs?: a one day conference to showcase some of the most important and innovative research findings based on the 1991 SARs, Cathy Marsh Centre for Social Survey Research, University of Manchester, 16 November 2001.

 Williamson P. (2002) ‘Small area population estimates: micro and macro approaches’, Producing national sets of small area population estimates: where are we now, and where are we going.  Workshop organised by the Royal Statistical Society and the British Society for Population Studies, Royal Statistical Society, London, 15 March 2002.