Two weeks ago, I made the case for specifying the global problems you wish to spend years on. Today I want to place these choices at the right altitude, because from arm’s length everything blurs and ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Every survey finding published by Pew Research ...

For-profit hospitals provide most inpatient physical therapy but tend to have worse readmission rates to general hospitals. Medicare doesn’t tell consumers about troubling inspections. By Jordan Rau ...

Targeting matters most. Surveying the wrong audience can lead to misleading data and poor decisions, even if the questions themselves are solid. Weighting shapes reality. Overrepresenting certain ...

Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. A crucial issue in the plastic recycling industry is the loss of quality in recycled ...

Data quality control programs used in the mineral industry normally define tolerance limits based on values considered as good practice or those that have previously been applied to similar deposits, ...

Abstract: The paper presents an analysis of sampling of the measured signal when the number of samples in the measurement interval is small and at the same time the ...