The relation between a proportional change in inputs to a productive process and the resulting proportional change in output. If an n per cent rise in all inputs produces an n per cent increase in output, there are constant returns to scale. If output rises by a larger percentage than inputs, there are increasing returns to scale. If output rises by a smaller percentage than inputs, there are decreasing returns to scale.

• 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
• intervention, intra-marginal
• intra-industry trade
• intra-marginal intervention
• intra-marginal intervention in foreign exchange markets
• intrapreneur
• invention
• inventories
• inverse function
• investment
• investment bank