This document discusses global business strategy and international firms. It defines global strategy and discusses different types of global strategies such as international, multidomestic, global, and transnational strategies. Key points include that global strategies have evolved with globalization and new types of global corporations are emerging. Global strategies can provide competitive advantages through economies of scale, extending product lifecycles, and operational flexibility across multiple markets. National comparative advantages and the global business environment must also be considered in developing an effective global strategy.