A price index of the prices of commodities, mainly agricultural and mineral products traded in bulk. Commodity price indices are used as leading indicators of economic fluctuations.

• ratchet effect
• rate, business
• rate, long
• rate of exchange
• rate of growth
• rate of interest
• rate of return
• rates
• rate support grant
• ratio
• rational expectations
• rationality
• rationalization
• rational number
• rationing
• Rawlsian social welfare function
• raw materials
• R&D
• reaction curve
• Reaganomics
• real balance effect
• real balances
• real business cycle
• real costs
• real exchange rate