When a lower-quality property is adjacent to a higher-quality property, it can diminish the value of the higher-quality property. What economic principle of value is this?

Anticipation refers to the value derived from the expectation of future benefits or improvements. While future potential can influence property values, it does not directly address how the existence of a lower-quality property affects the value of a higher-quality property. Thus, anticipation does not apply to the scenario described.

The contribution principle states that the value of a property is determined by the value it adds to the overall property or area. This concept focuses on positive impacts rather than the negative influence of adjacent properties. Therefore, it does not explain how a lower-quality property can detract from the value of a higher-quality one.

Progression is the economic principle that suggests properties in a better location or of higher quality positively influence the values of surrounding lower-quality properties. While this principle highlights positive interactions, it does not pertain to situations where a lower-quality property negatively affects a higher-quality property, as described in the question.