Greg Mankiw reports that he’s had 5,000,000 visits to his blog in two years.

The rationales I hear from Harvard profs who decline to blog—too busy, blogs are insufficiently scholarly—seem underwhelming in light of such a number. Mankiw has clearly found, or created an audience; initiated a conversation; found a way to extend himself as a thinker and teacher.

Isn’t the skepticism re blogging really just a resistance to change?