The phrase "a study concluded" is correct and usable in written English.
It can be used when summarizing the findings or results of a research study.
Example: "A study concluded that regular exercise significantly improves mental health."
Alternatives: "the research found" or "the study determined".
Broadcast and cable television networks devote only minimal attention to public service advertising, a study concluded, amounting to just 0.4percentt of all air time.
"A detectable acceleration is likely to emerge from the noise of internal climate variability in the coming decade," a study concluded in 2016.
Last year, military officials opened numerous job categories to women after a study concluded that the Defense Department was ready for greater inclusion in combat units.
Vindication for his pogonophobia appears finally to have emerged after a study concluded that men's beards harbour more germs than dogs carry in their fur.
A few weeks ago a study concluded that patients needed only one shot of vaccine against swine flu, not two as previously thought.
The inforgraphic was published after a study concluded that fast food and fizzy drinks have been vilified to the possible detriment of public health.
He released a study concluding that Obama was faring worse than McCain on television news.
A Yale psychology professor, Marianne LaFrance, drew attention last year with a study concluding that hair really does matter.
But it also cites a study concluding that one additional conviction per 100 elected officials reduces job growth by 1.1percentt.
A study concludes that independent businesses benefit from "buy local first" campaigns but still face challenges.
In 2006 he published a study concluding that there was an extensive Internet community around such beliefs, and he called 10 sites he studied "likely psychotic sites".
