This document discusses different aspects of economic development. It defines development economics as focusing on improving economies in developing countries by enhancing factors like health, education, and policies. It examines macroeconomic and microeconomic factors relating to economic structure and domestic and international growth. The document outlines different development goals for various groups in a society. It also discusses methods for measuring national development, like national income, per capita income, and indicators used in the UN's Human Development Report. Finally, it defines sustainable development as managing resources for long-term wealth and well-being, with the objectives of sustained income rises, pollution reduction, rational resource use, and fulfilling future generations' needs.