Coverage Error in Internet Surveys
With 89% of U.S. adults online, survey research is rapidly moving to the Web. But 89% is not 100%, and surveys that include only those who use the internet run the risk of producing biased results.
Numbers, Facts and Trends Shaping Your World
The aging of populations raises concerns about the affordability of publicly funded pension and health care programs in the future. Many developed economies already expend a sizable share of their GDP on these programs. For example, public expenditures on pensions and health care currently consume about 13% of GDP in the U.S. and in excess […]