Surviving Andersonville: The Benefits of Social Networks in POW Camps
利用两个独立数据集，发现战俘营中朋友关系显著提高生存概率，且关系越紧密（如同族、同乡、亲属），效果越强。
Twenty-seven percent of the Union Army prisoners captured July 1863 or later died in captivity. At Andersonville, the death rate may have been as high as 40 percent. How did men survive such horrific conditions? Using two independent datasets, we find that friends had a statistically significant positive effect on survival probabilities and that the closer the ties between friends as measured by such identifiers as ethnicity, kinship, and the same hometown, the bigger was the impact of friends on survival probabilities.