Good morning, Boston, and welcome to Friday. To all who attended our 40 Under 40 event last night, it was great to see you. This is Managing Editor Don Seiffert bringing you the five things you need to know in Boston business news, and a shameless plug: If you're driving to Salem this weekend against the advice of everyone in the state to take the T, the least you can do is pay to park at Carlton Elementary School on Bridge Street and support my kid's PTO.
More people are leaving Massachusetts…
