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Table 1 Descriptions of the indicators for influencing factors

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

Respects

Variable

Code

Unit

Data sources

Dependent variable

Government health expenditure

GHE

104 Yuan

the Statistical Yearbook of the prefecture-level cities in 2017

Socioeconomic factors

Gross Domestic Product

GDP

108 Yuan

the Statistical Yearbook of the prefecture-level cities in 2017

Urbanisation level

UL

Percent

the Statistical Yearbook of the prefecture-level cities in 2017

Proportion of Secondary Industry

PSI

Percent

China Urban Statistical Yearbook – 2018

Health factors

Number of Hospital Beds

NHB

Beds

China Urban Statistical Yearbook – 2018

Number of hospitals

NH

Hospitals

the Statistical Yearbook of the prefecture-level cities in 2017

Number of doctors

ND

Person

China Urban Statistical Yearbook – 2018

Policy factors

Integration of urban and rural residents’ medical insurance

IURMI

/

Human resources and social security websites of cities

Proportion of government health care expenditure in GDP

PGH

Percent

the Statistical Yearbook of the prefecture-level cities in 2017

Environmental factors

Annual average temperature

AT

Centigrade

the Statistical Yearbook of the prefecture-level cities in 2017

Annual rainfall

AR

Millimeter

the Statistical Yearbook of the prefecture-level cities in 2017

Industrial sulfur dioxide Emissions

ISDE

104 Tons

China Urban Statistical Yearbook – 2018

Population factor

Population density

PD

104 person per square kilometer

WorldPOP gridded population datasets