Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We analyse a stylised game of technology adoption with network effects and two new technologies. Potential adopters can adopt early, late or not at all. We show that one of the reasons for the failure of new technologies can be the presence of multiple incompatible variants of that technology. An adopter's individual incentives to adopt are lower with two technologies than with one. Turning to aggregate expected welfare, we find that two active technologies may be welfare‐improving.