It says: "The methodology employed makes the implicit assumption that transport connectivity is the only supply-side constraint to business location.
The Home Office is not publicly detailing the methodology behind the model, which it says was trained on more than 1,000 Islamic State videos, but says it will be sharing it with smaller companies in order to help combat "the abuse of their platforms by terrorists and their supporters".
To put the size of comScore into some context, its factsheet claims it tracks more than three million unique websites worldwide and its methodology page says it has "approximately two million worldwide consumers under continuous measurement".
"If Haqqani Sahib has departed (from) us physically, his ideology and methodology continue to endure," it said in a statement.
But the report was criticized by opponents of tighter gun laws, who faulted its methodology and said it ignored the beneficial effect of gun ownership in combating crime.
Ms. Gibbs, the deputy mayor, defended the study and its methodology, saying that it had used nationally accepted research methods and that no other group had produced a comparable analysis.
It attacked the study on the grounds of methodology and said it also appeared to have a conflict of interest, as some of the researchers, or the NGOs that employed them, had filed about a third of the objections.
Dr. Margaret K. Hostetter, who leads the department of pediatrics at Yale, was impressed with the study's methodology and said it reinforced the case for early vaccination.
"I don't know the exact methodology," he said, "It's a pie chart".
Republicans had complained about the study's methodology and said that it was biased because it used phrases such as the "Bush tax cuts" and "tax cuts for the rich".
