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Table 1 Estimated effects of chocolate scent on bookstore sales

From: Chocolate scents and product sales: a randomized controlled trial in a Canadian bookstore and café

Outcome

Unadjusted estimates

Adjusted for time trends

Total sales

Control mean

575.4 (SE = 34.7)

593.5 (SE = 30.4)

Treatment effect

36.6 (SE = 51.6)

2.7 (SE = 41.7)

Bulk sales

Control mean

72.0 (SE = 13.4)

71.2 (SE = 16.4)

Treatment effect

21.8 (SE = 17.5)

23.2 (SE = 21.2)

Café sales

Control mean

334.7 (SE = 15.2)

336.5 (SE = 12.6)

Treatment effect

−5.5 (SE = 21.1)

−8.9 (SE = 16.2)

Book sales

Control mean

168.7 (SE = 22.5)

185.7 (SE = 22.9)

Treatment effect

20.4 (SE = 32.0)

−11.6 (SE = 32.5)

  1. Estimates of control means and average treatment effects of chocolate scent on total sales, bulk coffee bean/loose tea/spice sales, café sales, and book sales in Canadian dollars. All estimates computed using ordinary least squares regression with robust standard errors. Unadjusted estimates computed without covariates. Adjusted estimates computed using a linear control for the day of experiment and fixed effects for the day of week, all mean-centered