Research is about observation, not opinion.
Public Opinion Research was created in 1976.
Opinion Research Corporation was created in 1938.
American Association for Public Opinion Research was created in 1947.
World Association for Public Opinion Research was created in 1947.
Roper Center for Public Opinion Research was created in 1947.
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surveys
The singular possessive form for the noun opinion is opinion's.Example: My opinion's foundation is a lot of research.
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Not at all. An essay is often an opinion much like a speech. While a research paper is very carefully reported and done. There is going to be references and annotations.
It should be a research work by work on all aspect of the topic and reporter should be unbiased but don't insert his own opinion in the story.
It is a matter of opinion, but you would need to eat a sample of all of them to find out. Research is the great pleasure here