New York and Boston--Harvard Business School Publishing and NewsStand Inc., a publishing technology provider, announced a three-year agreement under which NewsStand will serve as a digital circulation service for the Harvard Business Review. NewsStand's technology and distribution service will enable Harvard Business Review to offer digital versions of the magazine, in the same format as the printed version, to global audiences via the Internet. As part of the agreement, Harvard Business School Publishing will offer digital paid subscriptions and single-copy sales to customers. Digital subscriptions will be first be marketed in June. The cost of digital subscriptions and single copies haven't yet been determined.