The phrase "a report estimates" is correct and usable in written English.
You can use it when referring to the findings or projections made by a report regarding a specific subject or data point.
Example: "According to a report, it estimates that the population will increase by 10% over the next decade."
Alternatives: "a report suggests" or "a report predicts".
Still, Merrill Lynch analysts in New York released a report estimating that print and broadcast ad sales had stabilized at lower levels.
On Monday, a South Korean human rights group released a report estimating that China was forcibly repatriating 100 refugees to North Korea a week.
In June 2005, the London School of Economics released a report estimating the cost over 10 years at between £10.6bn and £19.2bn, a figure dismissed by Clarke as "complete nonsense".
Researchers at the Chinese Academy of Governance have just released a report estimating the costs at over 1.8 trillion renminbi.
Last week the Pentagon released a report estimating that 26,000 people in the military were sexually assaulted in the 2012 fiscal year, up from 19,000 in 2010.
In September the Institute for Social and Economic Research released a report estimating that licensing the sale of cannabis could reduce the government deficit by between £0.5bn and £1.25bn pounds.
The hearing came as the government issued a report estimating that national health spending totaled $2.5 trillion last year, or 17.3 percent of the economy.
Sabel began his career in the building as an intern in 2008, when he wrote a report estimating that NT Live would need to reach 500 screens worldwide to cover average costs of £200,000.
Michael L. Mayo, an analyst with Prudential Financial, released a report estimating legal and regulatory liabilities of $10 billion for Citigroup as a result of its business with the two bankrupt companies along with other corporate scandals.
