This research looks at how a special type of computer model, called CGE models, helps study how air travel projects and rules can affect the economy. These models use equations to show how people, businesses, and technology interact in the air travel sector. They can look at things like time and different locations in great detail. By using these models, experts studied the economic effects of projects like building a new runway in Brisbane and a new airport in Sydney. This helps us understand how changes in air transport can impact the economy.