It is often taken for granted that if more firms were innately honest or et
hical this would be a good thing. We use the example of pollution policy to
dispute such a claim. If regulation is by pollution tax social welfare is
non-monotonic in population honesty. The choice of policy instrument may it
self be characterised by 'reversals', with command-and-control methods bein
g preferred for intermediate Values of population honesty, a tax system bei
ng preferred at the extremes. This means that if - because of the spread of
'ethical shareholding' or for whatever reason - the honesty of the corpora
te population increases through time, we should not be surprised to see at
first a switch away from market-based instruments, and then a switch back.
Though environmental regulation is chosen as a context, the implications ar
e more general. (C) 2001 Elsevier Science B.V. All rights reserved.