1. Special populations, special services The effects of geography and spatial behavior on health care utilization among the residents of a rural region;Arcury;HSR: Health Services Research,2005
2. Instrumental variables;Bowden,1984
3. Suicide rates strongly correlate with altitude: A study of 3,060 U.S. Counties;Brenner,2006
4. Does social capital reduce crime?;Buonanno;The Journal of Law and Economics,2009
5. Perceived social isolation and cognition;Cacioppo;Trends in Cognitive Sciences,2009