  Collective behavior of the complex socio-economic systems is heavily
influenced by the herding, group, behavior of individuals. The importance of
the herding behavior may enable the control of the collective behavior of the
individuals. In this contribution we consider a simple agent-based herding
model modified to include agents with controlled state. We show that in certain
case even the smallest fixed number of the controlled agents might be enough to
control the behavior of a very large system.
