David Easton developed a systems model to analyze how political systems function. The model views a political system as a complex whole made up of interrelated parts. It examines the linkage between "inputs" and "outputs" in a political system. Inputs consist of demands and support from the public, such as demands for higher living standards or support through tax payments. Outputs are the decisions and actions of the government, like passing laws or imposing taxes. The model posits that outputs generate feedback that shapes further public demands and support, and that the political system aims for equilibrium by aligning outputs with inputs over the long term.

1. Input-Output Analysis

2.  David Easton developed a “model” of political
system to analyze how it functions.
 This ambitious model sets out to explain the
entire process as well as the function of major
political actors through the application of what is
called, “systems analysis”
 A system is an organized or complex whole, a set
of interrelated and interdependent parts that
form a collective entity.
 In case of a political system a linkage between
“inputs” and “outputs” exists.

3.  Inputs- it consists of demands and supports
from the general public.
 Demands- it can range from pressure for
higher standard of living, improved
employment prospects, more generous
welfare payments, greater protection for
individual and minority rights.
 Supports- these are ways in which public
contributes to the political system by paying
taxes, offering compliance and being willing
to particiapte in public life.

4.  Outputs- it consist of decisions and actions of
government including the making of policy,
passing of laws, the imposition of taxes, the
allocation of public funds.
Clearly these outputs generate “feedback”, which in
turn shapes further demand and support.
The key insight offered by Easton’s model is that
the political system tends towards long term
equilibrium or political stability, as its survival
depends on “outputs” being brought into line with
“Inputs”.