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created with NetLogo
view/download model file: distretti.nlogo
WHAT IS IT?
-----------
This model simulates the rising and
the expansion of industrial districts.
The agents of the model are FIRMS and
WORKERS. Firms can have two skills: technology (hight and low level) and
production (final, supplier, sub-supplier). We'll have a district when three
firms with same tecnology and different phase of production find each other and
they begin to work if they hire almost one worker. Creation of districts is
inflluenced by presence of demand of products or services.
The dimension of
district can increase by AGGREGATION function.
HOW IT WORKS
------------
The firms are looking for others in the neighbourhood
and if they don't find firms to cooperate they disappear.
Firms without
workers disappear.
In every cycle the survivor firms will create a district
and new firms will rise.
The new firms can join to the old districts if the
aggregation function is switched on.
If the DEMAND function is switched on
only the firms that are in an area with demand of products will survive.
HOW TO USE IT
-------------
Click the SETUP button to set up
the firms and workers.
Click the GO button to start the simulation.
With
the slider NUM-FIRMS and NUM-WORKERS you can choose the number of the firms and
the number of the workers at the beginning of the simulation.
The switch
AGGREGATION allows to start the aggregation function.
The switch DEMAND
allows to start the demand function.
The MONITORS count each types of firms
and the workers hired.
THINGS TO NOTICE
----------------
Watch how any SETUP quickly settles firms and workers when DEMAND switch
is on.
Watch what happens in GO procedure when both the switches are off.
Watch what happens in GO procedure when only the DEMAND switch is on.
Watch what happens in GO procedure when only the AGGREGATION switch is on.
Watch what happens in GO procedure when both the switch are on.
How are
the results different?
THINGS TO TRY
-------------
Watch
what happens modifing both values of the sliders.
How are the results
different?
EXTENDING THE MODEL
-------------------
It could
be interesting to add more technology levels or more different phases of
production.
You can try to give some skills to workers: age, sex and
ability.
CREDITS AND REFERENCES
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