If you look at other counties in the state, mine (NL, SE CT) is the only one who had a number of black lines coming in.
What the map doesn’t tell you is at the time Pfizer shut down a R&D facility in Michigan and most of the in-flows were researchers who decided to stick with Pfizer and relocate to New London/Groton.
I heard an interesting story about the EB division long ago. It seems when the union went on strike, supervisors filled those jobs and productivity went UP despite a 2/3rds reduction in the labor force. Instead of the supervisors constantly having to tell people what to do, they just did it themselves and built those boats better and faster.
Good luck up their.