Dora Costa quoted in CNN article about Civil War prisons

Dora Costa, a UCLA economics professor, studied the life histories of 41,000 white and black Union soldiers. She found that men who entered prison camps with friends and comrades were more likely to survive, especially those with similar ethnicity.

“What we find is, basically, it did help to have men who were like you in there. From the same company or men to whom you are closely tied,” says Costa.

CNN article: http://www.cnn.com/2014/05/04/us/civil-war-150th-anniversary-prisons/index.html