Visit and for Latest Blog Posts

My coauthor Scott Allen and I continue to write about online networks, but for simplicity we’re not doing it here at  To keep up with our research, visit and for our current writing.

UPDATE 12/15/2019:  We are relaunching The Virtual Handshake blog. Follow us here for more content about social media, social technology, and online networks. David continues to write about venture capital, entrepreneurship, and other business topics at