Table 7 Slope heterogeneity tests results.

From: The impact of circular economy initiatives on urban air quality in the United States

 

Pesaran and Yamagata

Blomquist and Westerlund

Delta

3.637***

19.356***

adj.delta

4.671***

25.879***

  1. Significance levels of 1%, 5%, and 10% are indicated by ***, **, and *, respectively.
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