Contrarian reader Wallace McLean noticed something else about those maps: [T]he US Census Bureau seems to generate unemployment data for the 3,140 counties and "county-equivalent" units of geography below state level, with an average population of under 100,000. Statistics Canada only provides (roughly) comparable data for 73 "economic regions" within Canada, with no sub-provincial/territorial data for PEI or the territories. The 73 regions have an average population of over 450,000. Even if you could get free and up-to-date data out of Statscan, it's not nearly as fine-grained as what they seem to have in the States. There would seem to be some fundamental...

04 August, 2010

Contrarian reader Gus Reed has found a mistake in Census Canada's long form questionnaire — or at least in the sample that appears on the agency's website. It seems to me that at the top of page 5 the columns should be labeled "Person 3," "Person 4," and "Person 5" - continuing the logic of page 4. Is it my PDF reader that's wrong, or did StatsCan send out 2.4 million errors? StatsCan hasn't sent out anything yet, and there's still time to fix the error, along with the much more serious mistake of making the long form voluntary. But Gus...

28 July, 2010

Harper spokespeople argue that sending the voluntary census long form to a larger number of people will compensate for any loss of data quality due to the newly voluntary nature of the form. Milan Ilnyckyj explains the fallacy. One of the biggest challenges in statistics is collecting a representative sample: finding a subset of the population that will do a good job of approximating the whole group. When a dataset contains a lot of sampling bias and is not reflective of the general population, it is essentially worthless as a guide. That cannot be fixed by using a larger sample size, nor...

23 July, 2010

The libertarian devotion to individual freedom that led the Harper Government to kill Statistic Canada's mandatory long form census questionnaire apparently did not extend to the Chief Statistician of Canada's letter of resignation. Munir A. Sheikh posted a note about his resignation on the agency's website late Wednesday night. The Harper Libertarians redacted it Thursday morning, replacing it with an uninformative generic message. Here, for the record, thanks to Kady O'Malley, is the full text of the Chief Statistician's censored message to Canadians: July 21, 2010 OTTAWA -- There has been considerable discussion in the media regarding the 2011 Census of Population. There...

23 July, 2010