Global economics looks at how countries interact through trade, finance, labour, and investment and how those interactions happen to participate in the economy, policies and day-to-day life in our world. It studies how goods, services, money, and resources cross borders and how those movements impact economies, policies, and everyday life around the world. 

From a global perspective, we do not have any economically isolated countries in today's interconnected global economy. Global economics explains the connections between economic activity, such as the potential unemployment as a result of closing a factory in one country impacting another. It explains how rising oil costs in the Middle East puts upward pressure on the price of domestic and international transport everywhere. It studies the implications of topics like international trade agreements, exchange rates, tariffs, global supply chains, and multinational corporations. 

Global economics also covers the detail of global inequality- some with a high degree of wealth and others with low. It looks at factors that have contributed to this inequality, such as history, education, institutes, access to technology, etc. Global economists study, measure and analyze the role of organisations that create the rules of global economics, such as the World Bank, International Monetary Fund (IMF) and World Trade Organisation (WTO), and investigate the assistance that the institutions provide to countries at various stages of development.

Global economics also examines large-scale problems with transnational effects, such as climate degradation, migration, and pandemics. Climate disasters can affect food supply chains and pandemics can close whole economies, creating major disruption for millions of livelihoods, all of which can create large, cross-border economic impacts.

Another critical area is globalisation—an increasing interconnectedness of economies through digital technology and communication and trade. Globalisation has lifted many people of the poverty line, but has often come at new costs, such as job outsourcing, worsening environmental conditions, and even greater inequality.

Overall, global economics is about understanding the risks and opportunities of living in a closely connected world. It provides modelling tools to help make decisions that could improve fairness in international trade, tackle improving strategies for reducing poverty, and tackle major global issues of managed cooperation and good policy affecting millions of individuals. It reinforces that economic choices made in one geographical location ultimately affect us all.