Because economics is an umbrella term that is used to describe the many ways we create, exchange, and spend currency, related subjects include subcategories such as personal economics and international economics. Topics covering personal economics and local economics can explain how supply and demand and government policies affect every financial decision you or your community will have to make. Topics exploring international economics and policy explain how world financial institutions and governments compete and influence growth on a global stage, and how this impacts our daily financial decisions. For a more in-depth look at financial markets, check out topics that cover the global financial crisis and the way it will impact policy for decades to come. Topics in game theory break down how trading behavior affects the stock market and economic decisions around the world.