Registration date:
Trial 1: Wednesday, 21 March 2018
Trial 2: Tuesday, 29 January 2019
Intervention start and end date:
Trial 1:
Start: Wednesday, 21 March 2018
End: Wednesday 18 April 2018
Trial 2:
Start: Wednesday, 21 November 2018
End: Wednesday 21 December 2018
BETA ethics pre-registration number:
Trial 1: BETA ETH
Trial 2: BETA ETH 2018 - 03, 6/09/18
Experimental design:
Trial 1: An unbalanced three-arm RCT randomised at the individual level and a pre-post observational trial. Data will be collected at two follow-up periods: two and four weeks after intervention delivery.
Trial 2: A 2x2 factorial randomised trial, randomised at the individual level. Data collected at two follow-up periods: two and four weeks after intervention delivery.
Intervention(s):
Trial 1: Two different behaviourally informed interventions will be distributed to employees.
Trial 2: Two interventions (presented individually and in combination) were tested.
Control condition:
Trial 1: Pure control, attention control
Trial 2: No pure control (a before/after comparison will be used to estimate the effect of receiving no email)
Outcome(s):
Trial 1:
Primary outcomes:
- Workplace giving (WG) participation (joining or not joining).
- Change in average fortnightly WG donation.
Secondary outcomes:
- Total amount of money directed to WG each fortnight.
- Change in comprehension of WG.
- Charities receiving donations.
- Number of email read receipts.
- Number of click-throughs from email to WG sign-up page.
Trial 2:
Primary outcome:
- Workplace giving (WG) participation (providing any donation).
Secondary outcome:
- Change in average fortnightly WG donation.
Expected sample size:
Trial 1: 1,315 employees in the RCT. 687 employees in the pre-post trial.
Trial 2: 2,250 employees in the RCT.
Registration number:
Trial 1: BETA ETH 2018 – 01
Trial 2: BETA ETH 2018 – 03
Other:
AEA pre-registration
Trial 1: Shea Houlihan. 2018. Increasing workplace giving. AEA RCT Registry. March 20.
Trial 2: BETA, 2019. Increasing workplace giving (second study). AEA RCT Registry. 29 January 2019.
