Resolving The Principal Place of Business Conundrum: Adopting A Single Test For Federal Diversity Jurisdiction

28 Certainty and ease of application are the hallmarks of the nerve center test.29 As the Seventh Circuit explained: Since certainty of jurisdiction is a desideratum too - the parties ought to know definitely what court they belong in, and not face the prospect that their litigation may be set at naught because they made a wrong guess about jurisdiction - this circuit has long used a simple nerve center test for principal place of business.30 The corporation's nerve center is ordinarily found where the corporation has its headquarters.