A business school is a university-level institution that confers degrees in Business Administration. It teaches topics such as accounting, administration, finance, information systems, marketing, organizational behavior, public relations, strategy, human resource management, and quantitative methods. They include schools of business, business
administration, and management. There are four principal forms of business school. Some business schools center their teaching around the use of case studies (i.e. the case method). Case studies have been used in graduate and undergraduate business education for nearly one hundred years. Business cases are historical descriptions of actual business situations. Typically, information is presented about a business firm's products, markets, competition, financial structure, sales volumes, management, employees and other factors affecting the firm's success. The length of a business case study may range from two or three pages to 30 pages, or more. Business schools often obtain case studies published by Harvard Business School, INSEAD, other academic institutions, or case clearing houses (such as ECCH). Harvard's most popular case studies include