Organizational culture encompasses values and behaviors that "contribute to the unique social and psychological environment of an organization." According to Needle (2004), organizational culture represents the collective values, beliefs and principles of organizational members and is a product of such factors as history, product, market, technology, and strategy, type of employees, management style, and national culture. Culture includes the organization's vision, values, norms, systems, symbols, language, assumptions, beliefs, and habits. Ravasi and Schultz (2006) wrote that organizational culture is a set of shared assumptions that guide what happens in organizations by defining appropriate behavior for various situations. It is also the pattern of such collective behaviors and assumptions that are taught to new organizational members as a way of perceiving and, even, thinking and feeling. Thus, organizational culture affects the way people and groups interact with each other, with clients, and with stakeholders. In addition, organizational culture may affect how much employees identify with an organization.