The phrase "authoritative study" is correct and usable in written English.
It can be used to refer to a research study that is considered reliable and credible, often due to the reputation of the authors or the rigor of the methodology.
Example: "The findings of the authoritative study on climate change have been widely accepted by the scientific community."
Alternatives: "definitive research" or "reliable analysis".
After the most authoritative study ever carried out, that's what we're going to implement".
A graceful and authoritative study of the siblings' 27-year partnership.
He wrote three books about the island, as well as an authoritative study of the shearwater species of seabird.
According to one authoritative study, the Asian financial crisis of 1997 pushed 22m people in the region into poverty.
One authoritative study has found that up to £2bn has already been cut from adult social services.
Nevertheless, this is a work to be strongly recommended as a challenging and for the most part authoritative study.
In such instances, the community supported its findings with National Intelligence Estimates or authoritative studies that led American policymakers astray.
Several independent analyses, including authoritative studies from the Department of Energy's Argonne National Laboratory in Illinois, suggest that ethanol releases significantly less greenhouse gas emissions than gasoline.
But one of the few authoritative studies of the method, conducted in California from 1985 to 2001, found that those who entered relapse prevention treatment were slightly more likely to offend again than those who got no therapy at all.
Admiring articles were written, and he was among the central figures in two authoritative studies of southern soul, Guralnick's Sweet Soul Music and Hoskyns's Say It One Time For The Broken Hearted.
Dallas L. Salisbury, president of the Employee Benefits Research Institute, which conducts authoritative studies of pensions, calculated that the average 401(k) portfolio probably shrank by only about 10percentt in the third quarter.
