John Ioannidis

"Why Most Published Research Findings Are False"

Image source:

Year of Birth




Field of Knowledge




John P. A. Ioannidis (born August 21, 1965 in New York City) is a physician-scientist and writer who has made contributions to evidence-based medicine, epidemiology, data science and clinical research. In addition, he has pioneered the field of meta-research (research on research). He has shown that much of the published research does not meet good scientific standards of evidence.
Ioannidis studies scientific research itself, especially in clinical medicine and the social sciences. He is one of the most-cited scientists in literature. His 2005 paper “Why Most Published Research Findings Are False” is the most downloaded paper in the Public Library of Science, and has the highest number of Mendeley readers across all science.”Ioannidis is a Professor of Medicine, of Health Research and Policy and of Biomedical Data Science, at Stanford University School of Medicine and a Professor of Statistics at Stanford University School of Humanities and Sciences. He is director of the Stanford Prevention Research Center, and co-director, along with Steven N. Goodman, of the Meta-Research Innovation Center at Stanford (METRICS). He is also the editor-in-chief of the European Journal of Clinical Investigation. He was chairman at the Department of Hygiene and Epidemiology, University of Ioannina School of Medicine as well as adjunct professor at Tufts University School of Medicine.


Global Ranking
Ranking History201820162015201420132012