Research Article
Do Public-Private Partnerships Improve the Operational Efficiency of Infrastructure in Mainland China?
Table 3
Descriptive statistics of variables.
| Variable | National | Eastern | Central | Western | Mean | SD | Mean | SD | Mean | SD | Mean | SD |
| Concession (−) | 0.463 | 0.351 | 0.624 | 0.322 | 0.409 | 0.285 | 0.357 | 0.371 | IE (no) | 7.203 | 2.049 | 9.072 | 1.375 | 7.095 | 0.909 | 5.581 | 1.723 | PGDP (CNY) | 59323 | 25473 | 85059 | 24142 | 45700 | 7944 | 45802 | 14737 | Competition (km/km2) | 0.028 | 0.020 | 0.045 | 0.024 | 0.026 | 0.006 | 0.014 | 0.008 | Scale (km/km2) | 0.037 | 0.024 | 0.059 | 0.025 | 0.030 | 0.009 | 0.021 | 0.013 |
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