Bloomberg reporter Rebecca Greenfield thinks that signing emails with "best" is wrong. Yet, according to a survey that she did 75 percent of people use "best" or "thanks," a huge increase since
2003, when a University of Pennsylvania study found that only 5 percent use "best" to close an email. She argues that email has become some ubiquitous and that digital communications are so
informal that there is no need for a sign off since a sign off is a remnant of a written letter.
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