What is the term for a situation where a seller sets a high introductory price for a new product, to attract buyers who have a strong desire to get the product early, and who can afford it? The price then gets gradually reduced over time.

Revenue-earning possibilities which are foregone as a result of implementing a plan; the cost of not doing something else.

Goods or services which must be used together are called:

A concise structured document showing all risks for a contract / unit / organisation, including details of nature of risk, risk owner, anticipated impact, possible responses, etc

What do we call a contract term which is part of the contract, but which is not written into the contract documents?