This comprehensive economics report is divided into two parts: Microeconomics and Macroeconomics. The microeconomics section explores economies of scale, particularly in the context of oligopoly markets, using the Australian airline industry as a case study. It examines how factors like high capital costs and price competition influence market dynamics, illustrating these concepts with diagrams. The macroeconomics section analyzes the current state of the economy, focusing on the business cycle, the AD-AS model, and the factors influencing economic growth. It examines aggregate demand and supply, discussing how government spending and investment in human capital and infrastructure can stimulate economic expansion, using the French economy as an example. The report incorporates figures and diagrams to illustrate key concepts and concludes with a bibliography of cited sources.