Table 1 ULUEE measurement index system.

From: Empirical research of urban land use eco-efficiency in the Pearl River Delta urban agglomeration

Indicator type

Primary indicators

Secondary indicators

Input indicator

Capital

Urban capital stock (unit: RMB 100 million)

Labor

Employees in secondary and tertiary industries (unit: 10,000)

Land

Urban construction land area (sq. km)

Output indicator

Desired outcomes

Added value of secondary and tertiary industries (unit: RMB 100 million)

Undesired outcomes

Urban industrial SO2 (unit: 104 tons)

Urban industrial soot (dust) (unit: 104 tons)