The phrase "authoritative estimate" is correct and usable in written English.
It can be used when referring to a reliable and credible assessment or evaluation of a particular situation, data, or value.
Example: "The report provided an authoritative estimate of the project's costs, ensuring stakeholders had accurate information for decision-making."
Alternatives: "reliable assessment" or "credible evaluation."
The survey provides the first authoritative estimate of the extent of data mining by the government.
Cal Hill, the executive manager of the Alberta energy board's resources branch, said a new, more authoritative estimate would be completed next year.
An authoritative estimate is expected by the end of this year and the Swiss banks have committed themselves to pay in full.
In recent years, EDF has been conducting 16 studies with industry and academics to produce an authoritative estimate of leaks all along the natural gas supply chain.
The latest authoritative estimate on the health of polar bear populations comes from the Polar Bear Specialist Group at the International Union for Conservation of Nature (IUCN).
Even a 2016 authoritative estimate listed its GWP as 'NA'.1 This lack of GWP might be due to ozone's secondary status.
I can't find any authoritative estimates for the cost of today's action.
According to the authoritative estimates of Angus Maddison, the United States was the world's largest economy throughout the twentieth century.
The cost to society is enormous, with authoritative estimates ranging from $20 billion annually, as calculated by the N.I.M.H., to $48 billion reported by the Institute of Medicine of the National Academy of Sciences.
There is no accurate census of the number of computers connected to the Internet, but authoritative estimates run into the hundreds of thousands.
Authoritative estimates for the UK market underline the Kindle's power, with Amazon believed to account for nine out of 10 ebook sales – an indication of the Kindle's penetration.
