Did the generous terms of the GI Bill help mitigate post-World War II PTSD?

I asked myself that question as I was reading an oral history of jazz
the other night.

The WWII GI Bill was very generous. Not only could you get an
education, you could get a mortgage. And you could stay unemployed for a year
while getting $20 a week. 

John Graas, a French horn player, mentions in the jazz book that many
musicians in Los Angeles used the GI Bill to study music theory. I remember
reading also that some of the Beat writers found they could live on that $20 a
week in Mexico.

It made me wonder if the GI Bill had two effects; First, giving
American culture a boost (though I believe the injection of music theory into
jazz didn't do jazz much good, because I think that ideas began to elbow aside
emotion). Second, it gave a lot of new veterans time to reflect on their
experiences and absorb them.

In the book Over Here: How the GI Bill Transformed the
American Dream, Edward Humes lists dozens of actors, artists, musicians,
screenwriters, and others who learned their arts on the GI Bill, among them
Norman Mailer, Joseph Heller, Elmore Leonard, Rod Serling, Robert Duvall, and
Robert Rauschenberg. Not only did the money help the men, the influx of tuition
fees also kept many struggling schools from closing.  

I'd be interested in reading a study of writers and others who did
time in combat (such as the poet Anthony Hecht) compared to
those who did not.