The factors for consideration, listed in the main body of the circles, are fairly self-evident.  In the 4 areas where the circles intersect, you have the following:

Price war/Commodity pricing – I would also call this area “value pricing”, where there is little differentiation between products and where the customer is still willing to pay the price demanded.  This area is often where you will find price wars, with competitors cutting prices until they are either driven into specializing in some way, or go out of business because they have cut into their revenues too deeply.

Price Fixing – this area is where cartels like OPEC operate; companies collude with competitors to arrive at a market price.  This price is often more than what the customer wants to pay, but then are often forced to for lack of other options.

Positive Customer Value Perception – this area is where a company’s products offer features or other qualities that cause the customer to prefer your product over a competitor’s AND where they are willing to pay for this differentiation.

Competitors’ Pricing Advantage – this area is where the competitors’ products offer features or other qualities that cause the customer to prefer these other products over yours AND where they are willing to pay for this differentiation.