"doctoral study" is correct and usable in written English.
You can use it to refer to a study at the doctoral (Ph.D.) level. For example, "My doctoral study was on the effects of climate change."
What they are hiding in that claim is that it simply doesn't pay for an American student (i.e. U.S. citizen or permanent resident) to pursue doctoral study, as the salary premium for a doctorate is too small.
Talk story about a doctoral study of N.Y.
The New Yorker, December 25 , 1943P. 11 Talk story about a doctoral study of N.Y.
His doctoral study explores the digital literacy practices arising when adult learners complete writing assignments for a course.
By Jess Stein, Spencer Klaw, and Brendan Gill The New Yorker, December 25, 1943 P. 11 Talk story about a doctoral study of N.Y.
Soon after, Congress enacted the National Defense Education Act, which enabled almost 27,000 students to pursue doctoral study in fields of national need.
Talk story about a doctoral study of N. Y. dialect, made by Allan Hubbell, an instructor in English at Columbia.
Few funding opportunities, an overwhelming lack of role models, and alternative opportunities to work in cultural and creative industries or on a freelance basis means that doctoral study is not always the most attractive option.
"Maybe I've been in school too long; doctoral study has a way of turning your head into a never-ending seminar, and I'm now capable of having complicated, inconclusive thoughts about nearly any subject".
By S. Stein, Spencer Klaw, and Brendan Gill The New Yorker, December 25 , 1948P. 11 Talk story about a doctoral study of N. Y. dialect, made by Allan Hubbell, an instructor in English at Columbia.
Trapped in Czechoslovakia until the Velvet Revolution made migration to the United States for doctoral study possible, Dr. Fridrich, self-taught in differential and integral calculus, sketched out a solution to the Rubik's Cube in a tattered notebook even before owning one.
