This course will introduce the core concepts and policy implications of economics with political economy approach. We shall discuss the decision making of choices by consumers, business and government, and three problems: what(choice), how (technology) and for whom (i.e. distribution) to be produced? What is the opportunity costs of one decision-making by economic units? Economics I covers the topics including demand and supply, international trade, externality and public goods, consumer choice behavior, firm behavior, market structure, and factor markets and asymmetric information topics on Microeconomics.