Table 5 Estimation results of gravity model parameters and Pearson’s correlation between economic gravity and investment frequency.

From: An intercity investment network dataset of China based on the enterprise registration records (2000–2020)

Year

Gravity model parameters

Pearson’s correlation

k

β

Overall

0–100

100–500

>500

2000

0.0010000

0.4780

0.608

0.763

0.730

0.496

2005

0.0002511

0.3897

0.708

0.850

0.769

0.636

2010

0.0001548

0.4784

0.708

0.869

0.783

0.610

2015

0.0001345

0.4804

0.691

0.899

0.797

0.588

2020

0.0001984

0.4775

0.740

0.911

0.763

0.668

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