Paul Beamish's Contribution to a Dynamic Perspective on Ownership Strategies in MNEs. Presentation in the Panel "Joint Ventures and Strategic Alliances: Theory and Practice. A Quarter Century of Contributions by Paul Beamish." Organizer: Danny van den Bulcke; Panelists: Paul Beamish; Jean-Francois Hennart; Jonas Puck; Randi Lunnan; Alain Verbeke