  We consider age-structured models with an imposed refractory period between
births. These models can be used to formulate alternative population control
strategies to China's one-child policy. By allowing any number of births, but
with an imposed delay between births, we show how the total population can be
decreased and how a relatively older age distribution can be generated. This
delay represents a more "continuous" form of population management for which
the strict one-child policy is a limiting case. Such a policy approach could be
more easily accepted by society. Our analyses provide an initial framework for
studying demographics and how social constraints influence population
structure.
