We analyze wartime prosthetic device patents to investigate how demand and procurement policy can shape medical innovation. We use machine learning tools to develop new data describing the aspects of medical and mechanical innovations that are emphasized in patent documents. Our analysis of...

"This book frames the evolutionary path of medicine and provides a useful forecasting model. Tracing health spending from ancient times to the present with a single ratio, health expenditures as a share of income, reveals an s-shaped growth curve, rising rapidly after science made therapies more...