ICTMA_Presentation_Chao_Soto by gegeshandong

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									  A Multicultural Implementation of
Schelling’s Two-Dimensional Model of
Segregation using Concentric Circles
           of Racial Identity


    Theodore Chao and Sonia Soto
   The University of Texas at Austin
         Schelling’s Model
• Thomas C. Schelling’s Segregation Model
  from 1971
• Two-dimensional model showing Black and
  White individuals segregating based upon
  individual preferences to not be a minority
  within immediate surroundings.
• A simple model showing how minute
  mathematical variables can influence large-
  scale sociological patterns leading to a more
  complete understanding of systemic reform.
Schelling’s Model
        Concentric Circles

              3
                  2
                       1


                       classroom



                      school


                       neighborhood




• Concentric circles of racial identity,
  each representing a different
  conception of student identity.
             Our Model
• Adds more depth to race factor (White,
  African American, Hispanic, Asian, and
  Other) based on actual census data
• Uses 3-tier concentric circles to model
  how racial preferences affect
  segregation.
• Includes Boundary Crossers and
  graphs of White Flight phenomenon.
Our model in NetLogo
                  Sample Runs



  0% preference      25% preference   50% preference



      75%                                  100%
preference                                 preference
      Movies


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30% preference for 1st radius
                    Movies


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50 % 1st radius, 30% 2nd radius of 5, 10% 3rd radius of 10
                          3D Model




The z-coordinate represents the amount of times a turtle moves. White
turtles are on the bottom surface, showing they don’t move much. Non-
White turtles move much more with Black and Hispanic turtles moving at
about the same rates and Asian and Other turtles moving the most and
residing on the top surface. Run based on a 30% preference for the first
circle and a 40% preference for the second circle with a radius of 3.
Things we started to think about
 • Concepts of modeling, how it changes
   the way we see patterns and
   abstractions
 • Agent based world, how it helped flesh
   out a simple concept into a complex
   model
 • How small algorithms can map social
   inequities
          Observations
• Races tend to segregate a low comfort
  level akin to Schelling Model (30%)
• Whites don’t move much
• Hispanics and African Americans have
  similar rates of happiness
• Asians and Others take more time to
  reach desired comfort level
       Further Discussion
Include more factors, not just race:
• Income level, SES status
• School funding practices
• Resource allocation
• Parent’s level of education
• Level of English proficiency
• Fertility rate for each ethnicity
Move beyond NetLogo

								
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