> If you being late to your job causes others to start doing the same
You're missing the point entirely: Who cares if they're also late?
Short of them being late to something important like a meeting, it seriously couldn't matter less than any of the thousand other things you should focus on as a manager.
Unless you work in something with external time pressures (e.g. I used to work in equities and US market hours dictated our need to be available) there's no reason it should matter whether someone shows up at 9 or 9:45. If you're really worried about people missing each other, set core hours (11-3 say) where everyone's expected to be available.
You're missing the point entirely: Who cares if they're also late?
Short of them being late to something important like a meeting, it seriously couldn't matter less than any of the thousand other things you should focus on as a manager.
Unless you work in something with external time pressures (e.g. I used to work in equities and US market hours dictated our need to be available) there's no reason it should matter whether someone shows up at 9 or 9:45. If you're really worried about people missing each other, set core hours (11-3 say) where everyone's expected to be available.