CIPS describes a relationship spectrum from arm's-length/transactional through collaborative/partnership, matched to spend criticality, risk, and strategic importance; analysis helps select the appropriate relationship style before and during negotiation.
Reference: CIPS L4M5 (2nd ed.), LO 3.1 - Relationship types and the relationship spectrum; alignment to sourcing/negotiation approach.

Explanation
'Macroeconomic factors always directly influence the negotiations': This statement is false. For any given negotiation it is not the macroeconomic factor itself that necessarily influences the negotiation but the change or rate of change that factor.
'Changes in macroeconomic factors may affect businesses and individualsdifferently': This statement is true.
Macroeconomic factors are factors that have general effects on the economy and many businesses may be completely unaffected or affected more or less than others in the same industry by a change in a factor.
'Macroeconomic factors cannot be influenced by anyone's expectation or sentiment': This statement is false.
When it comes to macroeconomic factors another key consideration is expectation regarding what might happen to these factors, or specifically the measures, metrics or percentage rates associated with these factors in the future.
'Expectations on macroeconomic prospect are always correct': This statement is false. Expectations are not always correct.
LO 2, AC 2.2

Reference: CIPS L4M5 Study Guide, Section 2.2 - Cost and Price Analysis

Explanation
A monopoly exists when only one company can supply an essential product or service in a givenregion because of significant barriers to entry for any competitor. The barriers can be legal, regulatory, economic, or geographic. Ma Bell case is an example of monopoly. The company was broken up in 1982.
A monopsony is a market structure in which a single buyer substantially controls the market as the major purchaser of goods and services offered by many would-be sellers.
Pure or perfect competition is a theoretical market structure in which the following criteria are met:
- All firms sell an identical product (the product is a "commodity" or "homogeneous").
- All firms are price takers (they cannot influence the market price of their product).
- Market share has no influence on prices.
- Buyers have complete or "perfect" information-in the past, presentand future-about the product being sold and the prices charged by each firm.
- Resources for such a labor are perfectly mobile.
- Firms can enter or exit the market without cost.
Monopolistic competition characterizes an industry in which many firms offerproducts or services that are similar, but not perfect substitutes. Barriers to entry and exit in a monopolistic competitive industry are low, and the decisions of any one firm do not directly affect those of its competitors. Monopolistic competition is closely related to the business strategy of brand differentiation

An adversarial relationship in purchasing and supply arises when identical or equivalent good or services are available from competing suppliers and buyers/sellers are trying to gain an advantage over each other. Low levels of trust are characteristic of adversarial relationships. The outcome when two organisations with adversarial negotiate is most likely to be win-lose.
Reference:
Adversarial purchasing - Wikipedia
CIPS study guide page 32-35