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. 2024 May 15;19(5):e0299848. doi: 10.1371/journal.pone.0299848

Table 12. The treatment effect of regulatory policies with the Donut Hole approach.

Baseline RD estimator Donut Hole
Drop week 26
Donut Hole
Drop weeks 25–26
Donut Hole
Drop weeks 25–27
Donut Hole
Drop weeks 24–27
Donut Hole
Drop weeks 24–28
(1) (2) (3) (4) (5) (6)
Normative policies on Cultureis 1.223***
(0.127)
0.966***
(0.035)
1.072***
(0.087)
1.090***
(0.092)
1.243***
(0.047)
1.281***
(0.038)
Restrictive policies on Cultureis 1.469***
(0.110)
1.513***
(0.187)
1.568***
(0.200)
1.428***
(0.182)
1.478***
(0.158)
1.715***
(0.192)
Normative policies on Cultureif -0.004
(0.008)
-0.009
(0.008)
-0.015
(0.011)
-0.011
(0.011)
0.004
(0.007)
0.001
(0.007)
Restrictive policies on Cultureif -0.003
(0.002)
0.002
(0.004)
-0.002
(0.004)
0.005
(0.004)
-0.002
(0.004)
-0.002
(0.006)
Restrictive policies on Culturees -0.135***
(0.021)
-0.137***
(0.023)
-0.179***
(0.047)
-0.180***
(0.047)
-0.229***
(0.070)
-0.229***
(0.070)
Normative policies on Cultureef 0.014
(0.025)
-0.027
(0.031)
-0.013
(0.038)
-0.048
(0.040)
-0.054
(0.063)
-0.058
(0.067)
Restrictive policies on Cultureef 0.386***
(0.105)
0.513***
(0.046)
0.525***
(0.047)
0.472***
(0.083)
0.496***
(0.085)
0.532***
(0.035)
Polynomial Linear Linear Linear Linear Linear Linear
Bandwidth MSE MSE MSE MSE MSE MSE
Kernel function triangular triangular triangular triangular triangular triangular

Cluster standard errors are adopted. Asterisks denote significance levels (* = 0.10, ** = 0.05, *** = 0.01). Each cell presents a separate estimate from a rdrobust analysis.