those 31k are something completely different though (normalised, purchasing power, disposable income, household) the median income in sf/nyc is closer to 45k (

those 31k are something completely different though (normalised, purchasing power, disposable income, household) the median income in sf/nyc is closer to 45k (http://project.wnyc.org/acs2011/income.html#12.00/40.7310/-73.9809 http://project.wnyc.org/acs2011/income.html#12.00/40.7310/-7...)