Evidence-based decisions are based on data, not one anecdote. But anecdotes are still valuable.
The team that hangs out together, succeeds together

Managing through role models at Starbucks

The right culture is driven by the company's strategy and is communicated by role models. 

HBR Blog: How Starbucks's Culture Brings Its Strategy to Life, 2016-Dec-30 by Paul Leinwand and Varya Davidson

You should identify a few positive attributes within your culture that are connected directly to your identity and the specific capabilities that are driving success in your business, double down on them and find ways to accelerate and extend them throughout the organization. Empower the critical few managers and employees who personify the best behaviors and can help you bring them to the forefront. ...