2. Network externalities resulting in convergence around a single platform. As different games consoles
use different hardware components and configurations and different operating systems, the software is not
interchangeable between them. Two types of network externality result:
User externalities. Game players converge around the most popular console in order to permit
Yet, despite these forces that strengthen market leaders, the evidence of the industry is that seemingly-
impregnable market leaders are deposed: Atari by Nintendo, Nintendo by Sony. How has this happened?
Several factors appear to be important:
Technological advantage. The opportunities for innovation are constantly presented, giving outsiders
and underlings the potential to leapfrog incumbents in technological progressiveness.
Managing network externalities is a central feature of strategy in the industry: the key is the management
of expectations. Long before the launch of a new console, the console manufacturers are engaged in a
complex process of managing the perceptions of game developers and potential consumers.
Changes in the Dynamics of Competition and Basis of Competitive Advantage
A feature of the past two generations of consoles is that no single firm has emerged as dominant: in the
seventh and eighth generations the market has been split between Sony, Microsoft and Nintendo. What
has happened to the power of network externalities? Several things:
1. Growth and segmentation of the market. The video games market has grown in size and breadth. As
Figure 1 in the case shows, each new generation of consoles has surpassed its predecessor in terms of
2. Shifting balance of power between hardware and software producers. Although software always been
the major source of revenue (and the most important determinant of the consumer experience), in the past