Limitations of the Market Model Share Close Share Why is Facebook not here? Why is Twitter not here? Share on LinkedIn Share on Google Plus Permalink Email Peter W. Cookson, Jr. August 7, 2002 Authors: Heidi Steffens and Peter W. Cookson Source: Education Week The same media that for years spoke glowingly of Edison's accomplishments now tell a tale of corporate woe. Legacy Publication Expand Download Print Share Share PDF: Why is Facebook not here? Why is Twitter not here? Share on LinkedIn Share on Google Plus Email Download or Print Permalink Copy Link Embed PDF: Copy Embed Code