The Loyalty Effect: The Hidden Force Behind Growth, Profits, and The Loyalty Effect: The Hidden Force Behind Growth, Profits, and Human Resources and Personnel In the 1970s and 1980s, loya.docx Fostering Regional Integration in Africa: Lessons from Sasol Natural. U. S. corporations now lose half their customers in five years, half their employees in four, and half their investors in less than one. The Loyalty Effect reveals the secrets of successful companies which base their business strategies on loyal relationships. Reichheld lays out the principles that connect value creation, loyalty, growth, and profits, and shows how great companies have used these principles to build loyal customers, loyal employees, and loyal owners.