The multibillion dollars acquisition of WhatsApp raises questions about Facebook's valuation of intangible assets. In fact, researchers have shown that value drivers are increasingly shifting from tangible to intangible resources. That said, unlike tangible assets whose value can be easily measured and disclosed through financial statements, companies are not required to disclose information about their intangible assets.
JENY, A. and PAUGAM, L. (2014). Did Facebook overvalue WhatsApp? Accountancy, pp. 1-3.