Table 2 Coupling coordination degree classification.

From: Spatiotemporal evolution patterns of the coupling of carbon productivity and high-quality economic development in China

Coupled coordination development stage

Type

Range of D value

Incoordination

Severely incoordination

0 ≤ D ≤ 0.1

Extremely incoordination

0.1 < D ≤ 0.2

Moderately incoordination

0.2 < D ≤ 0.3

Mildly incoordination

0.3 < D ≤ 0.4

Adjustment

Critically coordination

0.4 < D ≤ 0.5

Critically coordination

0.5 < D ≤ 0.6

Coordination

Mildly coordination

0.6 < D ≤ 0.7

Moderately coordination

0.7 < D ≤ 0.8

Highly coordination

0.8 < D ≤ 0.9

Extremely coordination

0.9 < D ≤ 1