By Paul Schnaittacher and Paul Schnaittacher · Nov. 29, 2015 Nicholas Christakis completed his residency in internal medicine at Penn in 1991. He also began his graduate studies in sociology, earning a master’s degree from the College in 1992 and a doctorate in 1995.
Penn researchers find nearly half of observational social science studies overstate causality By Can Doga Bolukbasi · Sept. 13, 2026
Penn resumes Curricular Practical Training review for federally-compliant international students By Lavanya Mani · Sept. 13, 2026
The Penn Reading Project, a chance for first years to explore history up close By Christine Oh · 2 days ago
Penn looks to restart weekly-paid staff assembly after years-long vacancy By Ananya Karthik · Sept. 13, 2026