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Table 5 Interaction detection

From: The superposition effects of air pollution on government health expenditure in China— spatial evidence from GeoDetector

  GDP UL PSI NHB ND NH IURMI PGH AT AR ISDE PD
GDP 0.8999            
UL 0.9212a 0.2119           
PSI 0.9464a 0.5826b 0.1034          
NHB 0.9628a 0.9629a 0.8616a 0.8370         
ND 0.9609a 0.9656a 0.8634a 0.8473a 0.8362        
NH 0.946a 0.9033a 0.8584b 0.8639a 0.8668a 0.7502       
IURMI 0.9144a 0.2940b 0.1407b 0.8581a 0.8533a 0.8479b 0.0277      
PGH 0.9839b 0.6376b 0.4440b 0.9606b 0.9678b 0.8792b 0.1330b 0.0494     
AT 0.9282a 0.6373b 0.5627b 0.9154a 0.9138a 0.8996a 0.2245b 0.4657b 0.1537    
AR 0.9662a 0.6200b 0.4228b 0.9585a 0.9583a 0.8968b 0.1978b 0.5646b 0.3753b 0.1350   
ISDE 0.9593a 0.7543b 0.6296a 0.9022a 0.9075a 0.862a 0.5387a 0.6697b 0.6745a 0.6646b 0.5282  
PD 0.9184b 0.5916b 0.5508b 0.8747a 0.8713a 0.8552a 0.4606b 0.7951b 0.6318b 0.6112b 0.8815b 0.2769
  1. aFor double factor enhancement, q (X1 ∩ X2) > max (q (× 1), q (× 2))
  2. bFor nonlinear enhancement, q (X1 ∩ X2) > q (X1) + q (X2)