This course discusses the theory of elementary macroeconomics specifically on the Keynesians approach. Students will learn about the macroeconomics variables and their interactions and influences on the economy as a whole. The stabilization policy and its effectiveness in both closed and open economies will also be discussed in this course. Furthermore, students will also be exposed about the differences between the Keynesian and the Classical approaches in the analysis of the aggregate supply (labor market) and its implications on the equilibrium outcomes.