There are apparently many reasons Twitter's board decided to name Jack Dorsey permanent CEO. He knows and understands the product. He had the support of key investors. And as a co-founder who's been leading the struggling social media service on an interim basis since the summer, he has the "moral authority," as newly named chief operating officer Adam Bain put it, to make needed changes at the company, which is facing slow user growth and a crowded social media market.Read full article >>