LM estimated results.

LM estimated results.</p

Evaluation index system of UTT level after screening.

Evaluation index system of UTT level after screening.</p

Descriptive statistical results.

Descriptive statistical results.</p

S1 File -

(PDF)</p

Moran’s I scatter plot of UTT levels in 2019.

Moran’s I scatter plot of UTT levels in 2019.</p

Methodology model.

Methodology model.</p

Wald test results.

Wald test results.</p

Estimation results of the spatial heterogeneity of various influencing factors.

Estimation results of the spatial heterogeneity of various influencing factors.</p

Estimated results of influencing factors.

Estimated results of influencing factors.</p

Proxy variables for influencing factors.

Proxy variables for influencing factors.</p