Research on the spatial patterns and evolution trends of the coupling coordination between digital finance and sustainable economic development in the Yellow River Basin, China.

Clearly, this shows a decreasing trend, suggesting that the transfer probability is influenced by both the lag type and the initial level of coupling coordination. 4 Convergence analysis 4.1 σ -convergence result analysis This paper adopts the coefficient of variation for a σ -convergence test and measures the coefficient of variation of CCD from 2011 to 2021.

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