Entrepreneurs support economic growth by saving and investing in physical capital, human capital, innovation, and efficient organisation. Physical capital consists of tangible goods such as infrastructure, tools, and equipment. Human capital is required to make us of all this: workers, thinkers, teachers, and so on. Innovation often begins as an intangible good consisting of ideas that manifest as improved tools for increasing human capital productivity. Efficient organisation are the methods by which human and physical capital can be more wisely used to transform less scarce resources into more product.