I am looking for statistics for the acceptance of email endings in the academic community. I was informed that "Best regards" and "regards" are among the best ones. Is this true?
For example, this is a good source for the appropriateness of email salutation: https://thermaltoy.wordpress.com/2013/01/26/dr-who-or-professor-who-on-academic-email-etiquette/
From this source, about half of US professors prefer "Dr.", while the other half prefer "Prof.". How about "Prof. Dr." so we won't miss anything?
I also notice that a lot of members here recommend the email-writers to mention the connection between the writer and the professor. Is this always very important? Is it cost-efficient to go to conferences to meet with potential PhD advisors (I meant time-cost. $ is out of considerations.)?
Some related good stuffs How much detail to include in first email to potential PhD supervisor?