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. 2020 Dec 14;193:104345. doi: 10.1016/j.jpubeco.2020.104345

Table A.8.

Changes in search intensity by median SES.

School- Parent-
centered centered Google Khan
resources resources Classroom Academy
(1) (2) (3) (4)
Post-Covid * High SES 0.66*** 0.46*** 0.85*** 0.48***
(0.07) (0.03) (0.08) (0.05)
Post-Covid * Low SES 0.35*** 0.22*** 0.66*** 0.33***
(0.04) (0.02) (0.06) (0.03)



High-Low SES Change 0.31*** 0.25*** 0.19** 0.15**
(0.08) (0.03) (0.10) (0.06)

Notes: Heteroskedasticity robust standard errors clustered by DMA are in parentheses (* p < .10 ** p < .05 *** p < .01). Each column regresses the logarithm of the listed topic’s search intensity on a post-March 1 indicator and interacts the post indicator with above and below median SES indicators. Below each pair of interaction coefficients in panel B is the estimated difference between the high and low SES interaction coefficients. The regressions are weighted by DMA population and include fixed effects for week of year (1–52) interacted with above and below median SES indicators, and school year (2015–2020) interacted with above and below median SES indicators. The sample contains search data from June 2015 through May 2020, excluding March 2020 and weeks with major school holidays.