If you’ve got a lazy four grand to spare, Roy Morgan provides subscribers with complete computer tabulations of the questions asked analysed by a range of demographics. This isn’t much use to most of us, so it’s pleasing to learn that for the rest of the campaign, Crikey will be working with Roy Morgan Research to mine the data deeper. Today we are given cumulative two-party results for the pre-Rudd (January to December 2006) and Post-Rudd (January to June 2007) eras in seats that make the top 25 by numbers of public servants, self-employed, professionals/managers and unemployed. With due caution given to Morgan’s traditional skew to Labor, the early year Rudd honeymoon period and the general quirkiness of many of the results, here is a table showing Labor’s two-party preferred vote in each period from electorates of particular interest. By my reckoning, the sample sizes for any given electorate would be about 300 pre-Rudd and 150 post-Rudd. Also from Morgan: an alternative debate worm.