Jacob R. Hall Biography Jacob R. Hall is a Barry postdoctoral fellow at the University of Pennsylvania. He earned his PhD in economics at George Mason University. His academic research is in economic history, economic growth, and political economy. Articles See More Jacob R. Hall Jun 27th, 2022 David Hume on the Common Law and English Liberty Jacob Hall lays out how both David Hume and Adam Smith emphasize the importance of English common law in medieval England.