Listed below are letters since 2009 explain to institutions of organizations – with respect to the recipients’ own analyses of demographic differences, analyses by others that pertain to the recipients, or guidance on analyses of demographic differences that the recipients have given or should give to others – the ways analyses of demographic differences are undermined by failure to recognize patterns by which measures tend to be affected by the prevalence of an outcome. The letters listed below also appear on the Institutional Correspondence subpage of the Measuring Health Disparities page of jpscanlan.com. Links to the letters are included here to make them more accessible. Some more recent items have explanatory information in parentheses. Such information may eventually be added to all letters.
(Letter explains that obligations to generally reduce discipline rates pursuant to an April 2016 agreement with Department of Education will tend to increase racial disparities in discipline rates according to measures employed by the Department of Education.)
(Letter explains the premise underlying July 2016 suit brought against school district – that generally reducing suspension rates will tend to reduce proportion African Americans make up of suspended students is opposite of reality.)
(Letter, which may deemed a follow up to the letter of October 5, 2016, urges the ASA to explain the President of the United States statistical beliefs reflected in a speech on July 7, 2016) are the opposite of reality. See also “Things the President Doesn’t Know About Racial Disparities,” Federalist Society Blog (Aug. 5, 2016).)
(Letter explains to recipients, with respect to 2015 report they issued on discipline practices of Eureka (CA) City Schools, that generally reducing adverse discipline outcomes tends to increase, not decrease, relative differences in discipline rates and proportions more susceptible groups make up of persons experiencing the outcome.