The phrase "authoritative estimates" is correct and usable in written English.
It can be used when referring to estimates or assessments that are considered reliable and credible, often based on expert opinion or extensive research.
Example: "The report provided authoritative estimates on the economic impact of the new policy, which were widely accepted by analysts."
Alternatives: "reliable estimates" or "credible estimates".
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.
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.
There is no accurate census of the number of computers connected to the Internet, but authoritative estimates run into the hundreds of thousands.
Though authoritative estimates of the number of people left homeless are not yet available, a preliminary assessment by the American Red Cross shows that more than 31,000 residential buildings were destroyed or made uninhabitable by the storm.
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.
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).
