Drucker
Peter F. Drucker defines an entrepreneur as a person who looks out for change, responds to it and exploits the opportunity generated by the change. It may mean a new business, new product or a new service. He claims that a resource becomes an economic resource only when an entrepreneur finds a use for it. Some thinkers suggest that entrepreneurs are to be found in social sectors e.g., non-governmental organizations as well, i.e., social entrepreneurs. Another innovator type is the intrapreneur, who perform entrepreneurial functions, but bear less risk, because they work in an existing organization. These people innovate, but bear less risk, and also may not get rewards in proportion to the success of the new venture, but they certainly are change agents.
Read more about this topic: Entrepreneurial Economics