This book investigates the tensions between subjectivism and objectivism in the history of economics. The book looks at the works of Adam Smith, Carl Menger, Leon Walras, William Stanley Jevons, Oskar Morgenstern, Ludwig Mises, Piero Sraffa, and so on. The book highlights the diverse subjective and objective elements of their economic theories and suggests a reframing of methodology to better address the core problems of the theories. Contributors of the volume are leading members of the Japan Society of History of Economic Thought who have provided a comprehensive overview on the economics methodology and the related problems. Hence, this book will be of an invaluable asset to not only those who are interested in the history of economic thought, but also to scholars who are concerned with the methodological problems of economic science.