Latin for ‘other things being equal’. This means that other things which could change are for the moment being assumed not to. All statements in economics include such a clause, either explicitly or implicitly: it is impossible to list all the things which could alter. Any explicit ceteris paribus clause in an economic statement is included to draw special attention to the points mentioned, and cannot be taken as exhaustive.

• differentiation, product
• diffusion of innovations
• dilemma, prisoners'
• diminishing marginal product
• diminishing marginal rate of substitution
• diminishing marginal utility
• diminishing marginal utility of money
• diminishing marginal utility of wealth
• diminishing returns, law of
• direct investment abroad
• direct investment, foreign
• direct labour
• director
• directorates, interlocking
• direct tax
• dirigisme
• dirty floating
• discomfort index
• discount
• discounted cash flow
• discounted present value
• discount house
• discounting the future
• discount rate
• discount window