Data Sources:

1. Biography websites: Wikipedia, etc. 

2. Interview transcripts.

3. Posted contents on CEOs' personal social medias.

4. Google Search: Use various versions of each CEO's name (sometimes combine with company names), combined with relevant keywords such as "vegan", "vegetarian", "diet habit", etc. 

Information Screening Criteria:

We examine related text or image results from various data sources to judge CEOs' plant-based diet choices. 

Data Sources:

1. Twitter (or "X") platform.

Information Screening Criteria:

We obtain the establishment date of CEOs' Twitter accounts, their visibility, and their posted contents from the Twitter platform directly. Furthermore, we use Twitter's authentication feature to identify the genuine CEO account among multiple accounts with the same name or mimic accounts.