"insightful studies" is a correct and usable phrase in written English.
You can use it to describe research or investigations that have yielded particularly meaningful or insightful results. For example, "Dr. Smith has conducted several insightful studies on the impact of sustainable farming practices on local communities."
We also review insightful studies that relate not only catalytic activity, but also a host of other biophysical and cellular parameters, to organismal fitness.
Meanwhile, the American historian John Lukacs's decades' worth of books about Churchill — slicing fine tranches of the crucial months and weeks and even days — remain the most insightful studies of Churchill's psychology and political practice.
I thought that the chapter, "Genius and madness", was especially rich and varied; quoting Aristotle as well as discussing several insightful studies (out of the hundreds available) to make the author's points.
Guillermo Calvo's elegant analysis of the elusive concept of liquidity coupled with his insightful studies of some of the major crises of the past few decades make this book essential reading for economists, investors, and policy makers who are interested in gaining a deeper understanding of financial crises and their impacts.
And yet, as the few insightful studies of the Tea Party show, the both phenomena play on very similar attitudes and frustrations.
Additionally, there are creative and insightful studies of particular relevance to the needs of China.
It is an insightful study that gained its author, Richard Hofstadter, a Pulitzer prize.
The result is the most insightful study of evangelical religion in many years.
It is the most comprehensive and insightful study of the memory of the Civil War yet to appear.
Evangelicals believe that God speaks to them personally because they hone the skill of prayer, this insightful study argues.
A penetrating and insightful study of privacy and security in telecommunications for a post-9/11, post-Patriot Act world.
