Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Hilarious spelling mistakes that completely change the meaning. Trump officials restrict top ratings for staff across federal agencies Men’s lazy habit fueling millennial "dating crisis" revealed ...

Abstract: The problem of sequential anomaly identification is considered, where multiple data sources are simultaneously monitored and the goal is to identify in real time those, if any, that exhibit ...

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 ...

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 Michelson interferometer is the optical core of the Fourier Transform Spectrometer. In order to obtain the spectrum, one needs to sample the interferogram and then conduct Fourier ...