Table 1 Descriptive statistics for variables.

From: The impact of intellectual property demonstration policies on carbon emission efficiency

Variable

Observation

Mean

Standard deviation

Minimum

Maximum

CEE

3640

0.543

0.259

0.073

2.442

PDV

3640

0.211

0.408

0.000

1.000

TDV

3640

0.098

0.297

0.000

1.000

GTIC

3640

1.150

2.875

0.000

49.982

ISU

3640

0.399

0.103

0.086

0.835

EDL

3640

1.058

0.915

0.075

20.100

ER

3640

0.003

0.001

0.000

0.012

ES

3640

0.651

0.176

0.000

1.000

PSI

3640

0.477

0.110

0.019

0.910

  1. CEE: Carbon Emission Efficiency; PDV: Policy Dummy Variable; TDV: Time Dummy Variable; GTIC: Green Technological Innovation Capability; ISU: Industrial Structure Upgrade; EDL: Economic Development Level; ER: Environmental Regulation; ES: Energy Structure; PSI: Proportion of Secondary Industry.
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