“Valuation: Measuring and Managing the Value of Companies” has long been a definitive guide for corporate finance professionals. Eight editions in, the book’s lead author, Tim Koller—a partner at consulting giant McKinsey & Company—says the biggest surprise is what hasn’t changed. Koller speaks to Global Finance about one of the dealmaking world’s most enduring topics. Global Finance : To what extent does geography play a role in affecting a company’s valuation? Koller : It applies to most