The phrase "a massive study" is correct and usable in written English.
It can be used to describe a research project that is extensive in scope, size, or scale.
Example: "The researchers conducted a massive study to analyze the effects of climate change on biodiversity."
Alternatives: "a large-scale study" or "an extensive study."
A couple of years ago Jack Shaheen, a Lebanese-American professor, published Reel Bad Arabs, a massive study of some 900 films featuring Arab characters.
But the US the EPA is currently undertaking a massive study of the industry, so there may be answers from the preliminary report by the end of next year, though the full report will not be available until 2014.
It was a massive study, recruiting 202,000 women and using a risk algorithm as well as a tumour marker in the blood (CA125) and ultrasound of the ovaries.
A massive study of more than half a million people who might carry genetic mutations for 584 devastating childhood diseases has identified 13 who have mutations for severe conditions – but none of the symptoms of the disease.
Nearly 30 of the world's top oceanographers collaborated on a massive study that not only went back through the history books to describe the evolution of ocean temperature measuring methods, but also looked forward to future measuring techniques.
In 1857 he embarked on a massive study of another of his heroes, Frederick the Great, and The History of Friedrich II of Prussia, Called Frederick the Great appeared between 1858 and 1865.
I was diagnosed with depression shortly after getting put on birth control – something that doesn't seem so strange, considering that a recent, massive study concluded that women taking the combined oral contraceptive pill are 23percentt more likely to be diagnosed with depression.
A massive Utah study from 2008 reported on WebMD found that "people in the study who lived in the most walkable neighborhoods weighed an average of 8 pounds less than people who lived in the least walkable areas".
A massive national study of 14 million veterans and Medicare patients, published in 2009, showed no major improvement in safety after the 2003 reforms.
Just under 11,500 people took part in a massive online study for six weeks, in which they had to practice a range of different brain training tasks for a minimum of 10 minutes per day, three times per week.
He toured the Andes from Colombia to Peru at the turn of the 19th century, drawing conclusions that would later form the basis of a massive unfinished study of the cosmos.
