1. The document provides an overview of international trade and economics, including definitions of internal and international trade, theories of international trade such as comparative cost theory and opportunity cost theory, and features of international transactions.
2. International trade is defined as the exchange of goods and services across borders, and is impacted by factors like transportation, globalization, and multinational corporations. Key differences between internal and international trade include barriers to trade between countries and differences in economic environments and currencies between nations.
3. Theories of international trade discussed include comparative cost theory, opportunity cost theory, and Heckscher-Ohlin theory. Features of international transactions that distinguish them from domestic trade include immobility of factors of production between countries