A sample including representatives of different sections of the population being sampled in the same proportions as the overall population. This applies, for example, to choosing people from various sex and age groups. This is intended to improve the efficiency or decrease the cost of sampling.

• international commodity agreement
• international company
• international competitiveness
• international debt
• international debt crisis
• International Development Association
• International Economic Order, New
• international economics
• International Finance Corporation
• International Monetary Fund
• international monetary system
• international money
• international payments
• international reserves
• International Settlements, Bank for
• international trade
• International Trade Classification, Standard
• international transactions
• interpersonal comparisons
• interpolation
• Interstate Commerce Commission
• intertemporal budget constraint
• intertemporal substitution
• interval, confidence
• intervention in foreign exchange markets