It takes a task force to build a heliport

What emergency services are located in South Boston such that a helicopter might regularly need to bring people there?

There are many places a helicopter can land to pick up people in an actual emergency. No heliport is needed for that.

Or, are you suggesting it would make sense to bring injured people to the South Boston waterfront, and then use a helicopter to transport the patients from there to Mass General Hospital?

Tell us which projections should be used to "do that math".

Foundational input assumptions matter. People pushing these deals like to inflate them in a rosy manner. A classic example of that is when industry claims that regulations will cost an enormous amount of money, but evaluation and follow up proves that their "math" was carefully crafted to make a pre-determined overestimate (rather than be their conclusions drawn as the result of an honest estimate).

Perhaps "doing the math" should also include an adjustment factor for historical performance of estimates made by industry, real estate, and promotional government offices?

let’s see who actually did the math…

The impact of GE’s move to Massachusetts at best remains rather murky. The architects of this deal are either unable or unwilling to reveal the actual numbers of the net gain for MA (it citizens by extension).

Here’s what we do know: GE is moving (not hiring) 800 of it’s corporate employees to MA - meanwhile weeks after this deal was revealed, GE began laying dozens upon dozens (about 60 so far) of aerospace engineers from its Lynn facility. More are planned. Simultaneously, the Mayor and the Governor neglected to mention GE was shutting it Avon MA valve manufacturing facility eliminating well over 300 jobs there.

So let’s pause a moment and do some quick adding and subtracting (since the deal was announced):

Gain in new jobs for MA as a result of relocating GE Corp to MA: 0

Loss in MA jobs as a result of GE layoffs (currently): 350

Actually projected headcount change not increase jobs)
as a result of GE Corp relocation: 450

Avg cost of “job creation” costs to MA taxpayers (arising from deal struck with GE):

$150,000,000 / 450 relocated employee = $333,000 per executive relocated

Meantime, MA will be paying the cost of the unemployment insurance compensation to those laid off GE employees (estimated unemployment benefit based on a $50K/yr pay rate = $15,000 x 350 = $5,250,000 in first year alone) - is this one of those hidden benefits of this deal were are referring to?

For the sake of brevity, in a separate post, I will address your assertion of GE being so highly respected.

GE as one of the most respected companies…not so sure.

In the town of Pittsfield, GE already took advantage of the state’s resources — by leaking suspected carcinogens into the Housatonic River, and has for decades opposing a plan to remove them. In recent months, the company has resisted a federal agency’s demands for it to clean up more of the toxic mess from its old Pittsfield manufacturing plant — all while the firm was negotiating a deal with Baker’s & Walsh’s administration to receive millions in Massachusetts taxpayer subsidies.

GE’s pollution problems in Massachusetts mirror a similar situation they created New York. NY taxpayers gave GE subsidies at a time when the company was making the controversial move to shut down its cleanup of the Hudson River — a waterway which, like the Housatonic, was polluted with polychlorinated byphenols, or PCBs, by GE’s manufacturing facilities in the mid-20th century. In fact, GE is wholly or partially liable for at least 78 federal Superfund sites.

Something else that was not revealed during the Baker-Walsh GE Pep Rally was the fact that Baker, whose tight 2014 election campaign was backed by a GE-funded political group, does not appear to have made the new subsidies contingent on GE fixing their Pittsfield problem even though Baker’s own administration s one of the trustees responsible for restoring the Housatonic to health.

GE is also one of the largest recipients of incentives in the country, numbering already among the top 20 recipients of corporate welfare subsidies after hauling in a total of $1.5 billion since 1992 (with the majority of subsidies accruing in just the last five years). In 2014 alone, GE received nearly $100 million in subsidies from Cincinnati and the state of Ohio, where its U.S. Global Operations Center is located.

The reality is that these incentives are a drop in the bucket for a $250 billion + company like GE. These subsidies add to the $1.3 billion in federal and state subsidies the company and its affiliates have received in the last eight years, even as it has famously employed offshore strategies to lower its state and federal tax bills. GE typically paying a state tax rate of less than 2 percent.

A November 1998 Time magazine profile of GE concluded that “there is no starker example of the phenomenon of corporate welfare and vanishing jobs than General Electric Co.” The article goes on to say…the company has been a master at reducing its federal income tax obligations, particularly through complicated arrangements whereby GE stands in as the owner of assets for businesses that for one reason or another can’t use the tax breaks for these assets. General Electric has also proven itself adept at extracting tax breaks and subsidies from local and state governments, even as it has slashed employment.

GE has a lengthy record of criminal, civil, political and ethical transgressions, some of them shocking in the sheer magnitude of disregard for the well-being of its employee and the communities where it resides. I suppose I could list the scope of their conduct but such a list would exceed the capacity of this website. It exists and I’ll leave the research to those who might be interested.

The reality of this “great deal for the City of Boston and the Commonwealth of Massachusetts is that all it will result in is taking money out of the pockets of taxpayers when such resources should be targeting the actual needs of citizens.

As for your guarantee that this deal will serve as some sort of generator for other businesses relocating here…show me some hard facts to consider.