Economic history is the study of history using methodological tools from economics or with a special attention to economic phenomena. Research is conducted using a combination of historical methods, statistical methods and the application of economic theory to historical situations and institutions. The field can encompass a wide variety of topics, including equality, finance, technology, labour, and business. It emphasizes historicizing the economy itself, analyzing it as a dynamic entity and attempting to provide insights into the way it is structured and conceived. Using both quantitative data and qualitative sources, economic historians emphasize understanding the historical context in which major economic events take place. They often focus on the institutional dynamics of systems of production, labor, and capital, as well as the economy's impact on society, culture, and language. Scholars of the discipline may approach their analysis from the perspective of different schools of economic thought, such as mainstream economics, Austrian economics, Marxian economics, the Chicago school of economics, and Keynesian economics. Economic history has several sub-disciplines. Historical methods are commonly applied in financial and business history, which overlap with areas of social history such as demographic and labor history. In the sub-discipline called New Economic History or cliometrics, economists use quantitative (econometric) methods. In history of capitalism, historians explain economic historical issues and processes from a historical point of view. Early history of the discipline Arnold Toynbee made the case for combining economics and history in his study of the Industrial Revolution, saying, “I believe economics today is much too dissociated from history. Smith and Malthus had historical minds. However, Ricardo – who set the pattern of modern textbooks – had a mind that was entirely unhistorical.” There were several advantages in combining economics and history according to Toynbee. To begin with, it improved economic understanding. “We see abstract propositions in a new light when studying them in relation to historical facts. Propositions become more vivid and truthful.” Meanwhile, studying history with economics makes history easier to understand. Economics teaches us to look out for the right facts in reading history and makes matters such as introducing enclosures, machinery, or new currencies more intelligible. Economics also teaches careful deductive reasoning. “The habits of mind it instils are even more valuable than the knowledge of principles it gives. Without these habits, the mass of their materials can overwhelm students of historical facts.” In late-nineteenth-century Germany, scholars at a number of