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. 2026 Jan 23;26:635. doi: 10.1186/s12889-026-26195-w

Table 4.

Heterogeneous treatment effects

Variables Coefficient Standard error P‒value Observations
ATT -0.011 0.004 0.01 1502

All control variables, city fixed effects, and time fixed effects have been accounted for in the model, and the coefficient of control variables are not reported in the Stata results