The fundamental contribution of the paper is to contest the view that reduc
ing barriers to entry cannot retard market performance when firm rivalry is
productive. In a model of employee entry, we demonstrate that a reduction
in barriers to entry causes no fall in industry price when incumbents are a
ble to buy-off potential entry through higher wages. Over the longer term,
the analysis illustrates that reductions in barriers to entry can cause ind
ustry price to be greater than if entry barriers had persisted at their ini
tial level. Correspondingly, the model indicates that investment in endogen
ous barriers to entry and wage ceilings on executive salaries may enhance m
arket performance. (C) 2001 Elsevier Science B.V. All rights reserved.