International business refers to firms operating in multiple countries, known as multinational corporations (MNCs). MNCs have subsidiaries in each country they operate in and must manage legal and cultural differences between countries. Increased international business and globalization have led to rising world trade. World trade benefits countries by increasing aggregate demand and economic growth, raising living standards through jobs and technology from foreign direct investment. Economies are also now closely aligned through shared international business cycles, so economic shocks can spread between countries.