The answer to your question depends on exactly what you are intending to do. As a general rule, a Tax ID or Employer Identification Number (EIN) cannot be transferred when there has been a change of business structure or ownership. If the business merely changes its name or moves to a new location, it may retain the EIN but must notify the taxing authorities of the name change. If you are starting a new business and merely using the same name as was previously used by the other business, you will require a new EIN. The IRS website (www.irs.gov) provides a good explanation of when a new EIN is required.
The fall in new company starts does not necessarily mean that the American economy is less dynamic than it used to be, or that Americans are opening up new establishments at a lower rate than they did in the late 1970s.