Memon.nlogo

extensions [nw rnd]
breed [communities community]
communities-own [ethnicity socio-economic-status intra-ties inter-ties outside-ties preference]

undirected-link-breed [enagement-links engagement-link]
undirected-link-breed [marriage-links marriage-link]
;intra means with self
;inter means with memon ot self
;outside means different ethnicit
globals [
  social-power-non-memon
  non-memon-number
  social-power-memon
  memon-number]

to setup
  clear-all;
  reset-ticks

  create-communities Number-of-memon-communities [set ethnicity "Memon"]
  create-communities Number-of-non-memon-communities [set ethnicity "Non-Memon"]
  ask communities [set shape "dot"]
  ask communities [set size 5]
  ask communities [setxy random-xcor random-ycor]
  ask communities [ifelse ethnicity = "Memon" [set color red][ set color grey]]
  ask communities [ifelse Random-assign-social-economic-status = true [set socio-economic-status random 10][ifelse ethnicity = " Memon" [set socio-economic-status Memon-social-economic-status][ set socio-economic-status Non-Memon-social-economic-status]]]
  ask communities [set intra-ties 0 set inter-ties 0 set outside-ties 0]
  layout-circle (sort communities) max-pxcor - 2
  ask communities [ set label who ]


end

to go
  marry-off ;;(whether arranged marriage or relationship marriage)
  increase-social-ties
  ;kill-links
  tick
  if ticks >= 24 [stop]
end


to marry-off
  ask communities with [ethnicity = "Memon"][
    if preference = 0 [set preference []]
    let BCNM best-community-non-memon
    let BCM best-community-memon
    ifelse random 100 <= memon-to-memon-preference-marriage
          [ifelse BCM != self [set preference  lput (BCM) preference ][ set intra-ties  intra-ties + 1]];;create-link-with BCM set inter-ties inter-ties + 1][ set intra-ties  intra-ties + 1]]
    [ifelse BCNM != self [set preference  lput (BCNM) preference ][ set intra-ties  intra-ties + 1]];;create-link-with BCNM set inter-ties inter-ties + 1] [set intra-ties  intra-ties + 1] ]
  ]

  ask communities with [ethnicity = "Non-Memon"][
    if preference = 0 [set preference []]
    let BCNM best-community-non-memon
    let BCM best-community-memon
    ifelse random 100 <= non-memon-to-non-memon-preference-marriage
              [ ifelse BCNM != self [set preference  lput (BCNM) preference][ set intra-ties  intra-ties + 1]] ;;[create-link-with BCNM set inter-ties inter-ties + 1 ] [set intra-ties  intra-ties + 1]]
    [ ifelse BCM != self [set preference  lput (BCM) preference ][ set intra-ties  intra-ties + 1]];;[create-link-with BCM set inter-ties inter-ties + 1][ set intra-ties  intra-ties + 1] ]
  ]


end

to increase-social-ties
  ask communities [
  let my-pref preference
  let me self
  let ethc ethnicity
    ask communities [ if  member? me preference and member? self my-pref [create-link-with me
      if ethc = "Memon" and ethnicity = "Non-Memon" [set outside-ties outside-ties + 1]
      if ethc = "Non-Memon"  and ethnicity = "Memon" [set outside-ties outside-ties + 1]
     if ethc = "Memon" and ethnicity = "Memon" [set inter-ties inter-ties + 1 ]
      if ethc = "Non-Memon" and ethnicity = "Non-Memon" [set inter-ties inter-ties + 1]
      ]
  ]]
end

to-report best-community-memon
  set social-power-memon []
  set memon-number []
  ask communities with [ethnicity = "Memon"]

  [ set social-power-memon lput (socio-economic-status) social-power-memon
   set memon-number lput (self) memon-number]


  let num sum social-power-memon
  let divided-vec map [ i -> i / num ] social-power-memon


   report first rnd:weighted-one-of-list (map list  memon-number divided-vec  ) last
end


to-report best-community-non-memon
  set social-power-non-memon []
  set non-memon-number []

  ask communities with [ethnicity = "Non-Memon"]
  [ set social-power-non-memon lput (socio-economic-status) social-power-non-memon
   set non-memon-number lput (self) non-memon-number]

  let num sum social-power-non-memon
  let divided-vec map [ i -> i / num ] social-power-non-memon
  report first rnd:weighted-one-of-list (map list  non-memon-number divided-vec  ) last
end
@#$#@#$#@
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setup
setup
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go
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Number-of-memon-communities
Number-of-memon-communities
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Number-of-non-memon-communities
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Memon-social-economic-status
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Non-Memon-social-economic-status
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HORIZONTAL

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Inter-ties Memon
sum ([inter-ties] of communities with [ethnicity = \"Memon\"]) / 2
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MONITOR
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Intra-ties Memon
sum [intra-ties] of communities with [ethnicity = \"Memon\"]
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MONITOR
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Outside-ties
sum [outside-ties] of communities with [ethnicity = \"Memon\"]
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MONITOR
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Inter-ties Non-Memon
sum ([inter-ties] of communities with [ethnicity = \"Non-Memon\"]) / 2
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MONITOR
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sum [intra-ties] of communities with [ethnicity = \"Non-Memon\"]
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Memon Inter-Ties
Ticks Time (Years)
Count inter-ties
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0.0
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true
true
"" "ask communities with [ethnicity = \"Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot inter-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

PLOT
878
185
1153
348
Memon  Intra-Ties
Ticks Time
Count Intra-ties
0.0
10.0
0.0
10.0
true
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"" "ask communities with [ethnicity = \"Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot intra-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

PLOT
878
348
1153
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Memon Outside-ties
Ticks Time
Count Outer-ties
0.0
10.0
0.0
10.0
true
true
"" "ask communities with [ethnicity = \"Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot outside-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

PLOT
1153
15
1401
185
Non-Memon Communities Inter-ties
NIL
NIL
0.0
10.0
0.0
10.0
true
true
"" "ask communities with [ethnicity = \"Non-Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot inter-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

PLOT
1153
184
1401
348
Non-Memon Communities Intra Ties
NIL
NIL
0.0
10.0
0.0
10.0
true
true
"" "ask communities with [ethnicity = \"Non-Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot intra-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

PLOT
1153
347
1402
516
Non Memon Outside-ties
NIL
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true
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"" "ask communities with [ethnicity = \"Non-Memon\"][\n  create-temporary-plot-pen (word self)\n  \n  set-current-plot-pen (word self)\n  plot outside-ties \n  if ticks = 1 [  set-plot-pen-color one-of remove gray base-colors ]\n]"
PENS

BUTTON
281
58
344
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step
go
NIL
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OBSERVER
NIL
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1

@#$#@#$#@
## WHAT IS IT?

A simulation to model inter-ethic relationship where both communities not only show preferential attachment for a certain ethnicity. They also conisider the socio economic
class of the community. The model shows 2 different ethnicties each having m and n different communities. 
## HOW IT WORKS

The different communities each have a preference whether to marry someone from within the same ehtnicity or someone outside. While also choosing their marriaige partner community they are more likely to go for a community with higher a socio economic background score. Communities marry either into the same community, someone from outside the community but the same ethnicity or someone from outside the community but a different ethnicity.

## HOW TO USE IT

The two sliders indicate the preference each community has for the same community. The assign random socio ecnomic buttons allows to switch between random assignment of resources and dedicated assingment of resources amongst the different ethnicites. We also have 2 sliders to choose how many communities we want from each ethnicity.

## THINGS TO NOTICE

Some things to notice for the model is that if either of the ethnicity has a maximum preference for the same ethnicity we will always end up with a disjoint graph. We also notice that the community with the lowest social-economic score is most often left isolated and has no choice but to marry from within the community. We see the formation of hubs because of a higher preference based on socio economic score and the formation of a small world network which is either in the whole graph or present inside the 2 disjoint graphs. Both of these properties are of real human networks.

## THINGS TO TRY

Try running the simulation with extreme values for preference and different number of communities for each ethnicity. Try switcing between random assingment of resources and dedicated assingment of resources, try and play around with extreme values in this case aswell and see the resultant graph.

## EXTENDING THE MODEL

We can further extend this model by calculating the different measures such as betweeness centrality and eigen vector centrality. Another rule that can be encorporated and tested is the number of inter links and outer links change the socio-economic score. 

## NETLOGO FEATURES

A way to assign probablities based on the dynamic socio economic attribute and select a community based on these probabilities was needed. We were able to work around this by using the rnd library and the use of map.

Another intresting feature provided by netlogo was the use of dynamic charting. As the number of agents in our model changes we needed a way to construct a chart with N pens, this was also possible with the work around of seting up the chart when ticks = 1 and updating it otherwise.

## RELATED MODELS
1, Ruth Meyer, Laurence Lessard-Phillips, Huw Vasey (2016, February 02). “DITCH — A Model of Inter-Ethnic Partnership Formation”

2, Christopher Thron (2016, January 22). “Affinity/Hostility in Divided Communities”

3,Suvad Markisic, Sinan Kilic (2013, December 01). “Simulation of ethnic conflicts”

## CREDITS AND REFERENCES
1,Ruth Meyer, Laurence Lessard-Phillips, Huw Vasey (2016, February 02). “DITCH — A Model of Inter-Ethnic Partnership Formation” (Version 1.1.0). CoMSES Computational Model Library. Retrieved from: https://www.comses.net/codebases/4411/releases/1.1.0/

2,Christopher Thron (2016, January 22). “Affinity/Hostility in Divided Communities” (Version 1.0.0). CoMSES Computational Model Library. Retrieved from: https://www.comses.net/codebases/4780/releases/1.0.0/

3,Suvad Markisic, Sinan Kilic (2013, December 01). “Simulation of ethnic conflicts” (Version 1.0.0). CoMSES Computational Model Library. Retrieved from: https://www.comses.net/codebases/4048/releases/1.0.0/
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