TABLE 1—

Participant Sample, Interview Dates, and Interview Topics Around Sugar-Sweetened Beverage Tax: Berkeley, CA, 2015–2019

Interview Datesa	Type of Participant	No. (No. That Were Likely Self-Distributors)	Interview Topics
Nov 2015–Jul 2016	City staff and officials from the Department of Finance, City Attorney’s Office, and Public Health Division	5	Implementation time line and roles
	Tax administrator	2	Communications with distributors and retailers
			Process for tax collection
			Facilitators and barriers to tax collection and communication
			Recommendations for other cities
Jul 2016–Aug 2016, with verification in Aug 2019	SSBPPE commissioners	2	Composition of Commission
			Process for and content of recommendations to city
			Appraisal of City Council’s decisions
			Facilitators and barrier to achieving the Commission’s objectives
July–Dec 2015	SSB distributors	5	Knowledge of SSB tax
			Communications with city or tax administrators
			Process for calculating and paying SSB tax
			If and how making up for any costs of SSB tax
			Recommendations about implementation
Jun 2015–April 2017	Retailers and likely self-distributors		Knowledge of SSB tax
Retailers and UC dining: Jun–Nov 2015	Supermarkets (chain or specialty)	5	Awareness of distributor price increases
Self-distributors and follow-up interview of 6 nonchain retailers: May–Jul 2016	Small grocery stores	11 (6)	If and how making up for any SSB tax costs (e.g., higher distributor prices or tax on self-distribution)
1 chain supermarket: Nov 2016	Liquor stores	2	Communications with city and distributors
Follow-up with UC dining: April 2017	Convenience stores	5 (2)	Recommendations about the implementation process
	Independent restaurants and cafes	9 (8)	Process for calculating and paying SSB tax (self-distributors only)
	Drugstore	1	Awareness of how revenues are being spent via City Council and SSBPPE
	UC Berkeley dining	1	Opinions about SSB tax
All dates	Total retailers	34	•

Note. SSB = sugar-sweetened beverage; SSBPPE = SSB Product Panel of Experts Commission; UC = University of California. Interviews lasted approximately 15 to 90 minutes and were conducted in-person, except for distributors and SSBPPE commissioners, who were interviewed by phone.

^aInterview dates were spread out because some stakeholder interviews were timed according to implementation steps (e.g., we interviewed self-distributors after their remittance began). For other stakeholders (e.g., city officials and retailers), their schedules dictated dates.