The phrase "valuable studies" is correct and usable in written English.
It can be used to refer to research or investigations that are useful or important for a particular purpose. For example: "The researchers' valuable studies into the effects of climate change have helped us gain important insights into the future of our planet."
Its investments in tracking patient care had produced scores of valuable studies.
During that time he published his most valuable studies.
Essential sketches were drafted by Nobu Siraisi, and valuable studies of riders' responses were conducted by Arline Bronzaft, a psychologist.
Stola said Duda should bear in mind the broad context of Gross's work, which included valuable studies of the German and Russian occupations of Poland.
In his research on the structure of Earth's crust and Earth's internal constitution, he made valuable studies of radioactive heat generation within Earth and of Earth's thermal history.
It could make more progress if turf-minded state officials were more open to its valuable studies on better ballot design.
Nevertheless, the quality and quantity of the data make this an uncommonly valuable study.
He said: "This valuable study adds to a growing body of evidence strongly suggesting that simple lifestyle changes can help lower our risk of developing dementia.
More enlivening are a valuable study of the Shakespeare portraits and a brilliantly clever chapter on the sexual undertones of "A Midsummer Night's Dream".
Peters said a more valuable study would have included some sense of whether traditional journals have a similar quality control issue.
It has been told before, too, notably by Evan Thomas, in "The Very Best Men," about the early years of the C.I.A., and Hugh Wilford, in his valuable study "The Mighty Wurlitzer".
