Joost (/Yoast/) Rietveld is Assistant Professor in Strategic Management at the Rotterdam School of Management (RSM), Erasmus University. Joost obtained his PhD from Cass Business School, City University London. Joost studies platform competition and market dynamics for firms entering markets that are multi-sided (e.g., video games, mobile apps, and newspapers). A secondary research interest includes business models for e-businesses. Prior to his PhD, Joost worked as strategy manager for an independent video games developer in the Netherlands. He helped transitioning the firm from a traditional project-based, work-for-hire, business model to a self-sufficient digital publisher model. In 2013 Joost did a two-and-half year research visit with the Leonard Stern School of Business, New York University (NYU). At NYU Joost audited doctoral courses in the Management and Economics departments and forged academic relationships that resulted in joint research projects and co-authored working papers. Additionally, Joost taught multiple sections of a semester-long course based on his research at NYU as well as the New York Film Academy. Joost’s research has been published in leading academic journals including Research Policy as well as in the strategy textbook The Strategy Process. Joost has given invited presentations at various practitioner conferences including MIT (Boston, MA), the Entertainment Software Association (Washington, DC), the Electronic Entertainment Expo (E3) (Los Angeles, CA), Digital Shoreditch (London, UK), and Festival of Games (Utrecht, NL). At RSM, Joost teaches an undergraduate course in Industrial Organization (IO) and a graduate course on competitive dynamics in platforms and networked markets. Joost lives in Rotterdam with his girlfriend, Jeanine, and two playful British shorthair kittens.