Table 2 Effect of treatment on movement outcomes

From: Effects of a large-scale social media advertising campaign on holiday travel and COVID-19 infections: a cluster randomized controlled trial

   

Mean (95% CI)

OLS model

Number of days × counties

Campaign

Outcome

Period

High-intensity county

Low-intensity county

High-intensity county (95% CI)

P value

RI P value

Both campaigns

Distance traveled

From day − 3 to day − 1

−4.384 (−4.973,−3.796)

−3.603 (−4.254, −2.952)

−0.993 (−1.616, −0.371)

0.002

0.002

4,059

Both campaigns

Share ever left home

Thanksgiving (26 November) or Christmas (24–25 December)

72.326 (72.012, 72.639)

72.381 (72.092, 72.670)

0.030 (−0.361, 0.420)

0.881

0.911

2,017

Thanksgiving

Distance traveled

From day − 3 to day − 1

−6.082 (−6.822, −5.341)

−5.320 (−6.113, −4.527)

−0.924 (−1.785, −0.063)

0.035

0.030

2,072

Thanksgiving

Share ever left home

Thanksgiving (26 November)

71.308 (70.885, 71.731)

71.468 (71.071, 71.866)

0.012 (−0.438, 0.461)

0.959

0.966

689

Christmas

Distance traveled

From day − 3 to day − 1

−2.603 (−3.279, −1.927)

−1.823 (−2.588, −1.057)

−1.041 (−1.847, −0.235)

0.011

0.008

1,987

Christmas

Share ever left home

Christmas (24–25 December)

72.859 (72.507, 73.210)

72.852 (72.520, 73.185)

0.095 (−0.289, 0.479)

0.629

0.580

1,328

  1. The control and treatment means at the county level and different periods, in addition to the estimate of the treatment coefficient in Eq. (1). Standard errors are clustered at the county level. 95% CIs are reported in parentheses. P values are based on a two-sided test. RI P values are computed using randomization inference, accounting for the two-stage design.