We consider a location and allocation game for two competitor firms, A
and B, that each seek to locate p facilities in a network. A market i
s captured by a particular firm if that market's closest facility belo
ngs to that firm rather than a competitor. The question is as follows:
Firm A wants to locate its p facilities so that B, which enters also
with p facilities after Firm A has located its facilities, will captur
e the minimum market value possible. That is, Firm A wishes to preempt
Firm B in its bid to capture market share to the maximum extent possi
ble. A model is presented that addresses this issue, together with sol
ution methods and computing times.