3 
to the tail of the recurrence time distribution, i.e. to p\ 
More directly, the vector of steady state probabilities 
can be derived from the following two conditions: 
.,t ■ 
u fC = p U K_1 
U o = qU o + qu 1 + qu 2 + •** 
The first condition ensures the invariance of the steady 
state; the seco.nd ensures that entries to and exits from 
the income population balance. 
It follows that 
% - p\ ci ) 
u Q = 1- p p< 1 
The result,is, of course, identical with the distribution 
of the spent waiting time,derived above.