Research is the search for and retrieval of existing, discovery or creation of new information or knowledge for a specific purpose. Research has many categories, from medical research to literary research. Marketing research (also called consumer research) is a form of business research. It is a form of applied sociology which concentrates on understanding the behaviours, whims and preferences, of consumers in a market-based economy. The field of marketing research as a statistical science was pioneered by Arthur Nielsen with the founding of the ACNielsen Company in 1923.