Table 5.

Robustness test results: change in the sampling interval.

	GDP_S	GDP_L		GDP_S	GDP_L
HCE_CN	−0.387	1.471	HCE_SC	−0.014	−0.007
HCE_NMG	−0.182	0.659	HCE_BJ	−0.039	0.384
HCE_JL	−0.078	−0.052	HCE_TJ	−0.265	0.515