"my own study" is correct and can be used in written English.
It is generally used to refer to a specific area that is used for studying, such as a room in one's home. Example: After dinner, I went to my own study to continue working on my research project.
It has to do with my own study of history.
I recently conducted my own study of mandatory arrest laws by comparing the rates of murders by intimate partners before and after the laws went into effect.
My own small contribution to this literature comes from my own study of predictions that political scientists and economists have published of presidential elections.
From my own study of comedy history, there wasn't a whole load of surreal comedy in America until the Pythons arrived on the Public Broadcasting Service channel in 1974.
My own study of recent performance by lowest-seeded N.C.A.A. tournament teams shows that most lose in the first or second rounds to high-seeded teams, by substantial point differences.
In my own study of a grouping of Manhattan federal prosecutors on the job in 2001, I found that while the majority of them have left for the private sector today, there is no evidence that the revolving door types regulated more weakly than career officials.
And one of my own studies found that 35percentt of malaria drugs in Africa are substandard.
I often had to do my own studies and crunch my own numbers to get evidence to support Mr. Bush's policies.
Tomorrow I'll be doing my own studies, and then it's back to Leeds City Council for the first half of next week.
I eventually pursued my own studies in linguistics, a subject that fascinated me by the potential it offered to gain a better understanding of the nature of language, the relationship between language and culture, and my own multilingual background.
Compared to my own studies, experiments like those designed to discern the effects of age and alcohol on laughter were captivating (both concluded that the more you drink/age, the less you understand, but the more you laugh).
