globals
 [
   price.pcs           ; purchase price P1
   price.wsl           ; wholesale price P2
   price.ctr           ; contract price Pr
   price.deal          ; price of making deal
   num-product         ; product number per a producer
   cost.low            ; cost of producing goods with low qos Cl
   cost.high           ; cost of producing goods with high qos Cs
   cost.c.high         ; cost of producing goods with high qos by contracted producer C's
   cost.ivg            ; cost of investigating by contracted seller Ci
   rho                 ; stochastic number ρ
   expect.n            ; non-contracted producer expect value between trusted and nontrusted produce
   expect.c            ; contracted producer expect value between trusted and nontrusted production
   expect              ; expect value
   qos.p               ; positive factor of qos d+
   qos.n               ; negative factor of qos d-
   qos.m               ; minimal qos - qos_min
   mean.qos            ; average qos of producers
   mean.p.c            ; average profit of contracted producer
   mean.p.n            ; average profit of non-contracted producer
   mean.r.s.c          ; average profit rate of contracted seller
   mean.r.s.n          ; average profit rate of non-contracted seller
   sample.p.f.m        ; amount of nontrusted contracted producer who is found by sampled seller
   threshold.p.a1      ; active factor of producer's threshold s1+
   threshold.p.a2      ; active factor of producer's threshold s2+
   threshold.p.i1      ; inactive factor of producer's threshold s1-
   threshold.p.i2      ; inactive factor of producer's threshold s2-
   inspect-seller      ; the number of seller inspected
   inspect-producer    ; the number of producer inspected
   fine.s              ; seller's fine per unit
   ratio.c.p           ; contract production ratio
 ]

breed [ producers producer ]
breed [ sellers seller ]
breed [ regulators regulator ]
breed [ inspectors inspector ]
undirected-link-breed [ contracts contract ]  ; link producer and seller
undirected-link-breed [ products product ]    ; link producer and inspector
undirected-link-breed [ goods good ]          ; link seller and inspector
undirected-link-breed [ p.insps p.insp ]      ; link regulator and producer
undirected-link-breed [ s.insps s.insp ]      ; link regulator and seller

producers-own
 [
   contract.f         ; 1 contracted producer
   wealth.p           ; wealth of producer
   qos                ; qos of producer
   producer.m         ; producer is matched with seller
   scam               ; 1 producer nontrusted, 0 producer trusted
   sample.p           ; 1 producer is sampled by regulator
   sample.p.f         ; 1 nontrusted contracted producer is found by sampled seller
   profit.p           ; profit of producer
   profit.r.f         ; profit rate of producer
   threshold.p        ; transforming threshold value between two kinds of producers
   transform.f        ; 1 producer has transformed
   transform.f.c      ; 1 non-contracted producer wants to transform to contracted producer
 ]

sellers-own
 [
   contract.s         ; 1 contracted seller
   num-match          ; the number of producers match with one seller
   wealth.s           ; wealth of seller
   qos                ; qos of seller
   sample.s           ; 1 seller is sampled by regulator
   sample.s.f         ; 1 sampled seller is found cheating
   profit.s           ; profit of seller
   profit.r.s         ; profit rate of seller
   threshold.s        ; transforming threshold value between two kinds of sellers
   transform.s.c      ; 1 non-contracted seller want to transform to contracted seller
   transform.s.n      ; 1 contracted seller want to transform to non-contracted seller
 ]

regulators-own
 [
   qualification.r.g  ; the regulator's goal on the qualified rate of inspections
   budget.g           ; budget constraint on regulator's inspection
 ]

inspectors-own
 [
   qos            ; quality-of-service
 ]

;;;;;;;;;;;;;;;;;;;;;;;;
;;; Setup procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to setup
  ca
  setup-initialize
  set-default-shape producers "factory"
  set-default-shape sellers "building store"
  ask patches [set pcolor green]
  setup-producers
  setup-sellers
  setup-match
  setup-regulators
  set inspect-seller ceiling (inspect-rate.s * num-seller)
  set inspect-producer ceiling (inspect-rate.p * num-producer)

  let a (cost.high - cost.low - (fine-producer * inspect-producer / num-producer))      ; setting k1
  let b (cost.high - cost.low)
  set expect.n a / b

  reset-ticks

end

;;; Procedures in setup

to setup-initialize
  set num-product 50
  set cost.low 1
  set cost.high 1.5
  set cost.c.high 1.4
  set cost.ivg 0.5
  set qos.p 0.1
  set qos.n 0.11
  set qos.m 0.1
  set price.deal cost.c.high
  set price.ctr lambda * cost.c.high + (1 - lambda) * price.deal
  set threshold.p.a1 0.1
  set threshold.p.a2 0.05
  set threshold.p.i1 0.15
  set threshold.p.i2 0.2
end

to setup-producers
  create-producers num-producer
  [
    setxy random-xcor random-ycor
    set color yellow
    set size 1.2
    set contract.f 0
    set producer.m 0
    set qos 0.01
    set scam 0
    set wealth.p 100
    set threshold.p 0.1
    set transform.f 0
    set transform.f.c 0
  ]
end

to setup-sellers
  create-sellers num-seller
  [
    setxy random-xcor random-ycor
    set color yellow
    set size 2.2
    set qos 0.01
    set contract.s 0
    set wealth.s 1000
    set threshold.s 0.2
    set transform.s.c 0
    set transform.s.n 0
  ]
end

to setup-match
  if contractual?      ; switch on
  [
    ask one-of sellers
    [
      set color blue
      set contract.s 1
    ]
    ask n-of (round (num-producer / num-seller)) producers         ; generate contracted seller
    [
      create-contract-with min-one-of (sellers with [ contract.s = 1 ]) [ distance myself ]
      [ set color red ]
      set contract.f 1
    ]
  ]
  ask producers with [ contract.f = 0 ]
  [
    create-contract-with min-one-of (sellers with [ contract.s = 0 ]) [ distance myself ]
  ]
  ask sellers
  [
    set num-match (count contract-neighbors)
  ]
end

to setup-regulators
  set-default-shape regulators "person police"
  create-regulators num-inspect
  [
    set size 1.5
    set color red
    move-to one-of patches with [ pycor > 0 and pycor < 31 and pxcor > 0 and pxcor < 31 ]
  ]
end

;;;;;;;;;;;;;;;;;;;;;;;;
;;;  Go procedures   ;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to go

  ;; generate purchase price P1
  set price.pcs lambda * cost.high + (1 - lambda) * cost.low + ( random-normal 0.35 0.35 )

  if (ticks = 100)
  [ stop ]
  ;; if (count producers with [ contract.f = 0 ] = 0)
  ;; [ stop ]


  ask producers with [ contract.f = 0 ]
  [
    if any? contract-neighbors
    [
      set expect expect.n
      do-produce
     ]
  ]

  ask producers with [ contract.f = 1 ]
  [
    if any? contract-neighbors
    [
      define-expect.c
      do-produce
    ]
  ]

  ;; calculate the qualified rate of producers
  do-qualified-rate

  ;; inspect producers
  do-monitor-producer

  ;; inspect sellers
  do-monitor-seller

  ask producers
  [
    update-qos.producer
    update-wealth.producer
  ]

  set mean.qos mean [ qos ] of producers

  ;; contracted producer's transformation decision
  if any? producers with [ contract.f = 0 ]
  [
    ask producers with [ contract.f = 1 ]
    [
      do-compare-profit.producer.c
    ]
  ]

  ;; non-contracted producer's transformation decision
  if any? producers with [ contract.f = 1 ]
  [
    ask producers with [ contract.f = 0 and transform.f = 0 ]
    [
      do-compare-profit.producer.n
    ]
  ]

  ;; transaction price of contracted producer in the last term P1'(t-1)
  update-price.deal

  ;; generate contract price Pr
  set price.ctr lambda * cost.c.high + (1 - lambda) * price.deal

  ask sellers
  [
    update-qos.seller
    update-wealth.seller
  ]

  ;; non-contracted seller's transformation decision
  if any? sellers with [ contract.s = 1 ]
  [
    ask sellers with [ contract.s = 0 ]
    [
      do-compare-profit.seller.n
    ]
  ]

  ;; contracted seller's transformation decision
  if any? sellers with [ contract.s = 0 ]
  [
    ask sellers with [ contract.s = 1 ]
    [
      do-compare-profit.seller.c
    ]
  ]

  do-transform-seller

  ask inspectors [ die ]

  ask producers with [contract.f = 0]
  [
    ask my-links [die]
  ]

  ;; producer match with seller
  do-match

  ;; calculate contract production ratio
  do-contract-production-ratio

  ;; restore agent's relevant variables
  do-restore

  do-plots1

  do-plots2

  tick

end

;;; Procedures in go

to define-expect.c      ; setting k2
  let c (cost.c.high - cost.low - fine-producer * inspect-producer / num-producer)
  let d (fine-deposit * inspect-seller * num-inspect)
  let f (num-seller * num-product * [ num-match ] of (one-of contract-neighbors))
  let h (fine-producer + fine-deposit) * inspect-seller * inspect-producer * num-inspect
  let i (num-seller * num-product *  [ num-match ] of (one-of contract-neighbors) * num-producer)
  let j (cost.c.high - cost.low)
  set expect.c (c - d / f + h / i) / j
  set expect expect.c
end

to do-produce
  set rho random-float 1
  let expect.difference lambda * expect + (1 - lambda) * rho    ; expected profit difference
  set price.wsl price.pcs * (1 + delta)                         ; generate wholesale price P2
  let sellerID [ who ] of one-of contract-neighbors
  ifelse expect.difference > qos
  [
    set scam 1
    hatch-inspectors num-product
    [
      set qos (qos - qos.m)
      set hidden? true
      create-product-with myself           ; link inspectoretables with producers
      create-good-with (seller sellerID)
     ]
   ]
   [
     set scam 0
     hatch-inspectors num-product
     [
       set qos (qos + qos.m)
       set hidden? true
       create-product-with myself
       create-good-with (seller sellerID)
     ]
   ]
end

to do-qualified-rate
  ask regulators
  [
   let qr count inspectors with [ qos > mean.qos ]
   let tv count inspectors
   set qualification.r.g (qr / tv)
  ]
end

to do-monitor-producer                               ; inspect producers, sellers and inspectoretables
  ask n-of inspect-producer producers
  [
    if any? contract-neighbors
    [
      set sample.p 1
      set color red
      ask producers in-radius 3
      [
        set color red
      ]
    ]
  ]
end

to do-monitor-seller                                 ; inspect sellers and inspectoretables
  ask n-of inspect-seller sellers
  [
    if any? contract-neighbors
    [
      set sample.s 1
      set color red
      ifelse contract.s = 1
      [
        ask n-of num-inspect good-neighbors       ; inspect contracted seller's inspectoretables
        [
          if qos < qos.m
          [
            ask good-neighbors
            [ set sample.s.f 1 ]
            ask product-neighbors
            [ set color red  set sample.p.f 1 ]
          ]
        ]
        set sample.p.f.m (count contract-neighbors with [ sample.p.f = 1 ])
      ]
      [
        ask n-of num-inspect good-neighbors       ; inspect non-contracted seller's inspectoretables
        [
          if qos < qos.m
          [
            ask good-neighbors
            [
              set sample.s.f 1
            ]
          ]
        ]
      ]
    ]
  ]
end

to update-qos.producer           ; to change qos of producers
  ifelse color = red
  [ set qos (1 - qos.n) * qos + qos.m ]
  [ set qos (1 - qos.p) * qos + qos.p * qos.m ]
end

to update-qos.seller           ; to change qos of sellers
  ifelse color = red
  [ set qos (1 - qos.n) * qos + qos.m ]
  [ set qos (1 - qos.p) * qos + qos.p * qos.m ]
end

to update-wealth.producer     ; to change wealth of producers
   update-profit.p.non
   update-profit.p.con
   set wealth.p profit.p + wealth.p
end

to update-profit.p.non      ; non-contracted producer's profit
  ifelse any? contract-neighbors
  [
    if contract.f = 0
    [
      ifelse scam = 0        ; producing trusted products
      [ set profit.p num-product * (price.pcs - cost.high) ]
      [
        ifelse sample.p = 1
        [ set profit.p num-product * (price.pcs - cost.low - fine-producer) ]
        [ set profit.p num-product * (price.pcs - cost.low) ]
      ]
    ]
  ]
  [
    set profit.p 0
  ]

end

to update-profit.p.con     ; contracted producer's profit
  ifelse any? contract-neighbors
  [
    if contract.f = 1
    [
      ifelse price.pcs > price.ctr      ; P1 > Pr
      [
        ifelse scam = 0
        [ set profit.p num-product * (price.pcs - cost.c.high) ]
        [
          ifelse sample.p = 1
          [
            ifelse sample.p.f = 1
            [ set profit.p num-product * (price.pcs - cost.low - fine-producer - fine-deposit) ]
            [ set profit.p num-product * (price.pcs - cost.low - fine-producer) ]
          ]
          [
            ifelse sample.p.f = 1
            [ set profit.p num-product * (price.pcs - cost.low - fine-deposit) ]
            [ set profit.p num-product * (price.pcs - cost.low) ]
          ]
         ]
       ]
       [                                 ; P1 <= Pr
         ifelse scam = 0
         [ set profit.p num-product * (price.ctr - cost.c.high) ]
         [
           ifelse sample.p = 1
           [
             ifelse sample.p.f = 1
             [ set profit.p num-product * (price.ctr - cost.low - fine-producer - fine-deposit) ]
             [ set profit.p num-product * (price.ctr - cost.low - fine-producer) ]
           ]
           [
             ifelse sample.p.f = 1
             [ set profit.p num-product * (price.ctr - cost.low - fine-deposit) ]
             [ set profit.p num-product * (price.ctr - cost.low) ]
           ]
         ]
       ]
    ]
  ]
  [
    set profit.p 0
  ]
end

to update-price.deal
  ifelse price.ctr < price.pcs
  [ set price.deal price.pcs ]
  [ set price.deal price.ctr ]
end

to do-compare-profit.producer.c     ; contracted producer's transformation decision
  set rho random-float 1
  if any? (producers in-radius 3) with [ contract.f = 0 ]
  [
    set mean.p.n mean [ profit.p ] of ((producers in-radius 3) with [ contract.f = 0 ])
  ]
  ifelse profit.p < mean.p.n
  [
    if mean.p.n = 0
    [
      set mean.p.n 0.001
    ]
    let ψ1 (abs (lambda * (mean.p.n - profit.p) / mean.p.n) + (1 - lambda) * rho)
    ifelse ψ1 > threshold.p
    [

      ask my-links [ die ]
      set contract.f 0
      set transform.f 1
      set producer.m 0
      set threshold.p 0.1
    ]
    [
      ifelse sample.p.f = 1
      [ set threshold.p (1 - qos) * threshold.p ] ; (1 - threshold.p.i2) * threshold.p ]
      [ set threshold.p (1 - qos) * threshold.p  + threshold.p ] ; (1 - threshold.p.i1) * threshold.p ]
    ]
  ]
  [
    ifelse sample.p.f = 1
    [ set threshold.p (1 - qos) * threshold.p ] ; (1 - threshold.p.a2) * threshold.p + threshold.p.a2 ]
    [ set threshold.p (1 - qos) * threshold.p + threshold.p ] ; (1 - threshold.p.a1) * threshold.p + threshold.p.a1 ]
  ]
end

to do-compare-profit.producer.n     ; non-contracted producer's transformation decision
  set rho random-float 1
  ask my-links [ die ]
  set producer.m 0
  if any? (producers in-radius 3) with [ contract.f = 1 ]
  [
    set mean.p.c mean [ profit.p ] of (producers in-radius 3) with [ contract.f = 1 ]
  ]
  ifelse profit.p < mean.p.c
  [
    if mean.p.c = 0
    [
      set mean.p.c 0.001
    ]
    let ψ2 (abs (lambda * (mean.p.c - profit.p) / mean.p.c) + (1 - lambda) * rho)
    ifelse ψ2 > threshold.p
    [ set transform.f.c 1 ]
    [ set threshold.p (1 - qos) * threshold.p ] ; (1 - threshold.p.i1) * threshold.p ]
   ]
   [
     set threshold.p (1 - qos) * threshold.p + threshold.p ; (1 - threshold.p.a1) * threshold.p + threshold.p.a1
   ]
end

to update-wealth.seller           ; to change wealth of seller
  ifelse contract.s = 0
  [
    update-profit.s.non
  ]
  [
    update-profit.s.con
  ]
  set wealth.s profit.s + wealth.s
end

to update-profit.s.non            ; non-contracted seller's profit
  ifelse num-match > 0
  [
    ifelse sample.s.f = 1
    [
      set fine.s fine-seller
      set threshold.s (1 - qos) * threshold.s
    ]
    [
      set fine.s 0
      set threshold.s (1 - qos) * threshold.s + threshold.s
    ]
    set profit.s num-product * num-match * (price.wsl - price.pcs - fine.s)
    set profit.r.s profit.s / (num-product * num-match * price.wsl)
  ]
  [
    set profit.s 0
    set profit.r.s 0
  ]
end

to update-profit.s.con            ; contracted seller's profit
  ifelse num-match > 0
  [
    if price.pcs > price.ctr      ; P1 > Pr
    [
      ifelse sample.s.f = 1
      [
        let s1 num-product * num-match * (price.wsl - price.pcs - fine-seller)
        set profit.s (s1 - cost.ivg * num-match + num-product * sample.p.f.m * fine-deposit)
        set profit.r.s profit.s / (num-product * num-match * price.wsl)
        set threshold.s (1 - qos) * threshold.s
      ]
      [
        set profit.s num-product * num-match * (price.wsl - price.pcs)
        set profit.r.s profit.s / (num-product * num-match * price.wsl)
        set threshold.s (1 - qos) * threshold.s + threshold.s
      ]
    ]
    if price.pcs < price.ctr      ; P1 < Pr
    [
      ifelse sample.s.f = 1
      [
        let s2 num-product * num-match * (price.wsl - price.ctr - fine-seller)
        set profit.s (s2 - cost.ivg * num-match + num-product * sample.p.f.m * fine-deposit)
        set profit.r.s profit.s / (num-product * num-match * price.wsl)
        set threshold.s (1 - qos) * threshold.s
      ]
      [
        set profit.s num-product * num-match * (price.wsl - price.ctr)
        set profit.r.s profit.s / (num-product * num-match * price.wsl)
        set threshold.s (1 - qos) * threshold.s + threshold.s
      ]
    ]
  ]
  [
    set profit.s 0
    set profit.r.s 0
  ]
end

to do-compare-profit.seller.n       ; non-contracted seller's transformation decision
  set rho random-float 1
  ask my-links [ die ]
  if any? sellers with [ contract.s = 1 ]
  [
    set mean.r.s.c mean [ profit.r.s ] of sellers with [ contract.s = 1 ]
  ]
  if profit.r.s < mean.r.s.c
  [
    if mean.r.s.c = 0
    [
      set mean.r.s.c 0.001
    ]
    let u2 (abs (lambda * (mean.r.s.c - profit.r.s) / mean.r.s.c) + (1 - lambda) * rho)
    if u2 > threshold.s
    [ set transform.s.c 1 ]
  ]
end

to do-compare-profit.seller.c       ; contracted seller's transformation decision
  set rho random-float 1
  if any? sellers with [ contract.s = 0 ]
  [
    set mean.r.s.n mean [ profit.r.s ] of sellers with [ contract.s = 0 ]
    if profit.r.s < mean.r.s.n
    [
      if mean.r.s.n = 0
      [
        set mean.r.s.n 0.001
      ]
      let u1 (abs (lambda * (mean.r.s.n - profit.r.s) / mean.r.s.n) + (1 - lambda) * rho)
      if u1 > threshold.s
      [ set transform.s.n 1 ]
    ]
  ]
end

to do-transform-seller
  if (count sellers with [ contract.s = 1 ] > 0) and (count sellers with [ contract.s = 0 ] > 0)
  [
    if any? sellers with [ transform.s.c = 1 ]
    [
      ask one-of sellers with [ transform.s.c = 1 ]      ; choose one of non-contracted seller who want to transform
      [
        ask other sellers with [ transform.s.c = 1 ]
        [ set transform.s.c  0 ]
      ]
    ]
    if any? sellers with [ transform.s.n = 1 ]
    [
      ask one-of sellers with [ transform.s.n = 1 ]
      [
        set contract.s 0
        ask contract-neighbors
        [
          set contract.f 0
          set producer.m 0
        ]
        ask my-links [ die ]
      ]
    ]
    ask sellers with [ contract.s = 1 ]
    [
      if not any? contract-neighbors
      [
        set contract.s 0
      ]
    ]
  ]
end

to do-match
  let nn (count producers with [ transform.f.c = 1 ])
  if nn > 0
  [
   if any? sellers with [ contract.s = 1 or transform.s.c = 1 ]
   [
     ask producers with [ transform.f.c = 1 ]
     [
       create-contract-with min-one-of (sellers with [ contract.s = 1 or transform.s.c = 1 ]) [ distance myself ]
       [ set color red ]
       set contract.f 1
       set transform.f.c 0
       set producer.m 1
       set threshold.p 0.1
       ask contract-neighbors
       [
         set contract.s 1
         set color green
         set transform.s.c 0
       ]
     ]
   ]
  ]
  let fn count producers with [ contract.f = 0 ]
  if fn > 0
  [
    if (count sellers with [ contract.s = 0 ] > 0)
    [
      ask producers with [ contract.f = 0 ]
      [
        create-contract-with min-one-of (sellers with [ contract.s = 0 ]) [ distance myself ]
      ]
    ]
  ]
end

to do-contract-production-ratio
  let c.p count producers with [ contract.f = 1 ]
  let p.s count producers
  set ratio.c.p (c.p / p.s )
end

to do-restore
  ask producers
  [
    set color yellow
    set sample.p 0
    set sample.p.f 0
    set transform.f.c 0
    set transform.f 0
    set producer.m 0
  ]
  ask sellers
  [
    set sample.s 0
    set sample.s.f 0
    set transform.s.c 0
    set transform.s.n 0
    set num-match (count contract-neighbors)
  ]
  ask sellers with [ contract.s = 0 ] [ set color yellow ]
  ask sellers with [ contract.s = 1 ] [ set color blue ]
end

to do-plots1
  set-current-plot "Qualified Rate"
  set-current-plot-pen "qualified-rate"
  plot [qualification.r.g] of one-of regulators
end

to do-plots2
  set-current-plot "Average QoS"
  set-current-plot-pen "average-qos"
  plot mean.qos
end
@#$#@#$#@
GRAPHICS-WINDOW
762
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1223
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14.16
1
10
1
1
1
0
1
1
1
0
31
0
31
0
0
1
ticks
30.0

BUTTON
129
409
220
469
Go
go
T
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

BUTTON
13
408
104
468
Setup
setup
NIL
1
T
OBSERVER
NIL
NIL
NIL
NIL
1

SLIDER
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17
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num-producer
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SLIDER
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1
NIL
HORIZONTAL

SLIDER
6
202
224
235
fine-deposit
fine-deposit
0
2
0.55
0.05
1
NIL
HORIZONTAL

SLIDER
6
164
224
197
inspect-rate.p
inspect-rate.p
0.01
1
0.51
0.1
1
NIL
HORIZONTAL

SLIDER
259
163
477
196
inspect-rate.s
inspect-rate.s
0.1
1
0.6
0.1
1
NIL
HORIZONTAL

SLIDER
262
69
480
102
num-inspect
num-inspect
0
20
5.0
1
1
NIL
HORIZONTAL

SLIDER
5
245
223
278
lambda
lambda
0
1
0.5
0.1
1
NIL
HORIZONTAL

PLOT
514
181
733
328
Qualified Rate
time
rate
0.0
10.0
0.0
1.0
true
false
"" ""
PENS
"qualified-rate" 1.0 0 -2674135 true "" ""

SWITCH
11
69
229
102
contractual?
contractual?
0
1
-1000

PLOT
515
350
734
496
Average QoS
time
value
0.0
10.0
0.0
1.0
true
false
"" ""
PENS
"average-qos" 1.0 0 -13345367 true "" ""

MONITOR
513
19
731
80
Contract Production Ratio
ratio.c.p
2
1
15

MONITOR
514
98
733
163
Average QoS
mean.qos
3
1
16

SLIDER
6
285
223
318
delta
delta
0
1
0.5
0.1
1
NIL
HORIZONTAL

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

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
@#$#@#$#@
default
true
0
Polygon -7500403 true true 150 5 40 250 150 205 260 250

airplane
true
0
Polygon -7500403 true true 150 0 135 15 120 60 120 105 15 165 15 195 120 180 135 240 105 270 120 285 150 270 180 285 210 270 165 240 180 180 285 195 285 165 180 105 180 60 165 15

arrow
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Polygon -7500403 true true 150 0 0 150 105 150 105 293 195 293 195 150 300 150

box
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Polygon -7500403 true true 150 285 285 225 285 75 150 135
Polygon -7500403 true true 150 135 15 75 150 15 285 75
Polygon -7500403 true true 15 75 15 225 150 285 150 135
Line -16777216 false 150 285 150 135
Line -16777216 false 150 135 15 75
Line -16777216 false 150 135 285 75

bug
true
0
Circle -7500403 true true 96 182 108
Circle -7500403 true true 110 127 80
Circle -7500403 true true 110 75 80
Line -7500403 true 150 100 80 30
Line -7500403 true 150 100 220 30

building store
false
0
Rectangle -7500403 true true 30 45 45 240
Rectangle -16777216 false false 30 45 45 165
Rectangle -7500403 true true 15 165 285 255
Rectangle -16777216 true false 120 195 180 255
Line -7500403 true 150 195 150 255
Rectangle -16777216 true false 30 180 105 240
Rectangle -16777216 true false 195 180 270 240
Line -16777216 false 0 165 300 165
Polygon -7500403 true true 0 165 45 135 60 90 240 90 255 135 300 165
Rectangle -7500403 true true 0 0 75 45
Rectangle -16777216 false false 0 0 75 45

butterfly
true
0
Polygon -7500403 true true 150 165 209 199 225 225 225 255 195 270 165 255 150 240
Polygon -7500403 true true 150 165 89 198 75 225 75 255 105 270 135 255 150 240
Polygon -7500403 true true 139 148 100 105 55 90 25 90 10 105 10 135 25 180 40 195 85 194 139 163
Polygon -7500403 true true 162 150 200 105 245 90 275 90 290 105 290 135 275 180 260 195 215 195 162 165
Polygon -16777216 true false 150 255 135 225 120 150 135 120 150 105 165 120 180 150 165 225
Circle -16777216 true false 135 90 30
Line -16777216 false 150 105 195 60
Line -16777216 false 150 105 105 60

car
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0
Polygon -7500403 true true 300 180 279 164 261 144 240 135 226 132 213 106 203 84 185 63 159 50 135 50 75 60 0 150 0 165 0 225 300 225 300 180
Circle -16777216 true false 180 180 90
Circle -16777216 true false 30 180 90
Polygon -16777216 true false 162 80 132 78 134 135 209 135 194 105 189 96 180 89
Circle -7500403 true true 47 195 58
Circle -7500403 true true 195 195 58

circle
false
0
Circle -7500403 true true 0 0 300

circle 2
false
0
Circle -7500403 true true 0 0 300
Circle -16777216 true false 30 30 240

cow
false
0
Polygon -7500403 true true 200 193 197 249 179 249 177 196 166 187 140 189 93 191 78 179 72 211 49 209 48 181 37 149 25 120 25 89 45 72 103 84 179 75 198 76 252 64 272 81 293 103 285 121 255 121 242 118 224 167
Polygon -7500403 true true 73 210 86 251 62 249 48 208
Polygon -7500403 true true 25 114 16 195 9 204 23 213 25 200 39 123

cylinder
false
0
Circle -7500403 true true 0 0 300

dot
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0
Circle -7500403 true true 90 90 120

face happy
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0
Circle -7500403 true true 8 8 285
Circle -16777216 true false 60 75 60
Circle -16777216 true false 180 75 60
Polygon -16777216 true false 150 255 90 239 62 213 47 191 67 179 90 203 109 218 150 225 192 218 210 203 227 181 251 194 236 217 212 240

face neutral
false
0
Circle -7500403 true true 8 7 285
Circle -16777216 true false 60 75 60
Circle -16777216 true false 180 75 60
Rectangle -16777216 true false 60 195 240 225

face sad
false
0
Circle -7500403 true true 8 8 285
Circle -16777216 true false 60 75 60
Circle -16777216 true false 180 75 60
Polygon -16777216 true false 150 168 90 184 62 210 47 232 67 244 90 220 109 205 150 198 192 205 210 220 227 242 251 229 236 206 212 183

factory
false
0
Rectangle -7500403 true true 76 194 285 270
Rectangle -7500403 true true 36 95 59 231
Rectangle -16777216 true false 90 210 270 240
Line -7500403 true 90 195 90 255
Line -7500403 true 120 195 120 255
Line -7500403 true 150 195 150 240
Line -7500403 true 180 195 180 255
Line -7500403 true 210 210 210 240
Line -7500403 true 240 210 240 240
Line -7500403 true 90 225 270 225
Circle -1 true false 37 73 32
Circle -1 true false 55 38 54
Circle -1 true false 96 21 42
Circle -1 true false 105 40 32
Circle -1 true false 129 19 42
Rectangle -7500403 true true 14 228 78 270

fish
false
0
Polygon -1 true false 44 131 21 87 15 86 0 120 15 150 0 180 13 214 20 212 45 166
Polygon -1 true false 135 195 119 235 95 218 76 210 46 204 60 165
Polygon -1 true false 75 45 83 77 71 103 86 114 166 78 135 60
Polygon -7500403 true true 30 136 151 77 226 81 280 119 292 146 292 160 287 170 270 195 195 210 151 212 30 166
Circle -16777216 true false 215 106 30

flag
false
0
Rectangle -7500403 true true 60 15 75 300
Polygon -7500403 true true 90 150 270 90 90 30
Line -7500403 true 75 135 90 135
Line -7500403 true 75 45 90 45

flower
false
0
Polygon -10899396 true false 135 120 165 165 180 210 180 240 150 300 165 300 195 240 195 195 165 135
Circle -7500403 true true 85 132 38
Circle -7500403 true true 130 147 38
Circle -7500403 true true 192 85 38
Circle -7500403 true true 85 40 38
Circle -7500403 true true 177 40 38
Circle -7500403 true true 177 132 38
Circle -7500403 true true 70 85 38
Circle -7500403 true true 130 25 38
Circle -7500403 true true 96 51 108
Circle -16777216 true false 113 68 74
Polygon -10899396 true false 189 233 219 188 249 173 279 188 234 218
Polygon -10899396 true false 180 255 150 210 105 210 75 240 135 240

house
false
0
Rectangle -7500403 true true 45 120 255 285
Rectangle -16777216 true false 120 210 180 285
Polygon -7500403 true true 15 120 150 15 285 120
Line -16777216 false 30 120 270 120

leaf
false
0
Polygon -7500403 true true 150 210 135 195 120 210 60 210 30 195 60 180 60 165 15 135 30 120 15 105 40 104 45 90 60 90 90 105 105 120 120 120 105 60 120 60 135 30 150 15 165 30 180 60 195 60 180 120 195 120 210 105 240 90 255 90 263 104 285 105 270 120 285 135 240 165 240 180 270 195 240 210 180 210 165 195
Polygon -7500403 true true 135 195 135 240 120 255 105 255 105 285 135 285 165 240 165 195

line
true
0
Line -7500403 true 150 0 150 300

line half
true
0
Line -7500403 true 150 0 150 150

pentagon
false
0
Polygon -7500403 true true 150 15 15 120 60 285 240 285 285 120

person
false
0
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Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90
Rectangle -7500403 true true 127 79 172 94
Polygon -7500403 true true 195 90 240 150 225 180 165 105
Polygon -7500403 true true 105 90 60 150 75 180 135 105

person farmer
false
0
Polygon -7500403 true true 105 90 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 195 90
Polygon -1 true false 60 195 90 210 114 154 120 195 180 195 187 157 210 210 240 195 195 90 165 90 150 105 150 150 135 90 105 90
Circle -7500403 true true 110 5 80
Rectangle -7500403 true true 127 79 172 94
Polygon -13345367 true false 120 90 120 180 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285 180 195 180 90 172 89 165 135 135 135 127 90
Polygon -6459832 true false 116 4 113 21 71 33 71 40 109 48 117 34 144 27 180 26 188 36 224 23 222 14 178 16 167 0
Line -16777216 false 225 90 270 90
Line -16777216 false 225 15 225 90
Line -16777216 false 270 15 270 90
Line -16777216 false 247 15 247 90
Rectangle -6459832 true false 240 90 255 300

person police
false
0
Polygon -1 true false 124 91 150 165 178 91
Polygon -13345367 true false 134 91 149 106 134 181 149 196 164 181 149 106 164 91
Polygon -13345367 true false 180 195 120 195 90 285 105 300 135 300 150 225 165 300 195 300 210 285
Polygon -13345367 true false 120 90 105 90 60 195 90 210 116 158 120 195 180 195 184 158 210 210 240 195 195 90 180 90 165 105 150 165 135 105 120 90
Rectangle -7500403 true true 123 76 176 92
Circle -7500403 true true 110 5 80
Polygon -13345367 true false 150 26 110 41 97 29 137 -1 158 6 185 0 201 6 196 23 204 34 180 33
Line -13345367 false 121 90 194 90
Line -16777216 false 148 143 150 196
Rectangle -16777216 true false 116 186 182 198
Rectangle -16777216 true false 109 183 124 227
Rectangle -16777216 true false 176 183 195 205
Circle -1 true false 152 143 9
Circle -1 true false 152 166 9
Polygon -1184463 true false 172 112 191 112 185 133 179 133
Polygon -1184463 true false 175 6 194 6 189 21 180 21
Line -1184463 false 149 24 197 24
Rectangle -16777216 true false 101 177 122 187
Rectangle -16777216 true false 179 164 183 186

plant
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0
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Polygon -7500403 true true 135 255 90 210 45 195 75 255 135 285
Polygon -7500403 true true 165 255 210 210 255 195 225 255 165 285
Polygon -7500403 true true 135 180 90 135 45 120 75 180 135 210
Polygon -7500403 true true 165 180 165 210 225 180 255 120 210 135
Polygon -7500403 true true 135 105 90 60 45 45 75 105 135 135
Polygon -7500403 true true 165 105 165 135 225 105 255 45 210 60
Polygon -7500403 true true 135 90 120 45 150 15 180 45 165 90

sheep
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0
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Rectangle -7500403 true true 47 225 75 285
Rectangle -7500403 true true 15 75 210 225
Circle -7500403 true true 135 75 150
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square
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0
Rectangle -7500403 true true 30 30 270 270

square 2
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star
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target
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Circle -7500403 true true 60 60 180
Circle -16777216 true false 90 90 120
Circle -7500403 true true 120 120 60

tree
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Rectangle -6459832 true false 120 195 180 300
Circle -7500403 true true 65 21 108
Circle -7500403 true true 116 41 127
Circle -7500403 true true 45 90 120
Circle -7500403 true true 104 74 152

triangle
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triangle 2
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truck
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Circle -16777216 true false 234 174 42
Rectangle -7500403 true true 181 185 214 194
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turtle
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0
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Polygon -10899396 true false 195 90 225 75 245 75 260 89 269 108 261 124 240 105 225 105 210 105
Polygon -10899396 true false 105 90 75 75 55 75 40 89 31 108 39 124 60 105 75 105 90 105
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Polygon -7500403 true true 119 75 179 75 209 101 224 135 220 225 175 261 128 261 81 224 74 135 88 99

van side
false
0
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Circle -16777216 true false 43 123 42
Circle -16777216 true false 194 124 42
Polygon -16777216 true false 45 68 37 95 183 96 169 69
Line -7500403 true 62 65 62 103
Line -7500403 true 115 68 120 100
Polygon -1 true false 271 127 258 126 257 114 261 109
Rectangle -16777216 true false 19 131 27 142

van top
true
0
Polygon -7500403 true true 90 117 71 134 228 133 210 117
Polygon -7500403 true true 150 8 118 10 96 17 85 30 84 264 89 282 105 293 149 294 192 293 209 282 215 265 214 31 201 17 179 10
Polygon -16777216 true false 94 129 105 120 195 120 204 128 180 150 120 150
Polygon -16777216 true false 90 270 105 255 105 150 90 135
Polygon -16777216 true false 101 279 120 286 180 286 198 281 195 270 105 270
Polygon -16777216 true false 210 270 195 255 195 150 210 135
Polygon -1 true false 201 16 201 26 179 20 179 10
Polygon -1 true false 99 16 99 26 121 20 121 10
Line -16777216 false 130 14 168 14
Line -16777216 false 130 18 168 18
Line -16777216 false 130 11 168 11
Line -16777216 false 185 29 194 112
Line -16777216 false 115 29 106 112
Line -7500403 false 210 180 195 180
Line -7500403 false 195 225 210 240
Line -7500403 false 105 225 90 240
Line -7500403 false 90 180 105 180

wheel
false
0
Circle -7500403 true true 3 3 294
Circle -16777216 true false 30 30 240
Line -7500403 true 150 285 150 15
Line -7500403 true 15 150 285 150
Circle -7500403 true true 120 120 60
Line -7500403 true 216 40 79 269
Line -7500403 true 40 84 269 221
Line -7500403 true 40 216 269 79
Line -7500403 true 84 40 221 269

x
false
0
Polygon -7500403 true true 270 75 225 30 30 225 75 270
Polygon -7500403 true true 30 75 75 30 270 225 225 270
@#$#@#$#@
NetLogo 6.2.2
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
<experiments>
  <experiment name="experiment" repetitions="100" runMetricsEveryStep="true">
    <setup>setup</setup>
    <go>go</go>
    <metric>count turtles</metric>
    <enumeratedValueSet variable="fine-deposit">
      <value value="0.55"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="num-inspect-veg">
      <value value="10"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="num-farmer">
      <value value="70"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="lambda">
      <value value="0.7"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="inspect-rate.s">
      <value value="0.5"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="fine-seller">
      <value value="1.2"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="fine-farmer">
      <value value="0.85"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="inspect-rate.f">
      <value value="0.51"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="num-seller">
      <value value="7"/>
    </enumeratedValueSet>
    <enumeratedValueSet variable="contractual?">
      <value value="true"/>
    </enumeratedValueSet>
  </experiment>
</experiments>
@#$#@#$#@
@#$#@#$#@
default
0.0
-0.2 0 0.0 1.0
0.0 1 1.0 0.0
0.2 0 0.0 1.0
link direction
true
0
Line -7500403 true 150 150 90 180
Line -7500403 true 150 150 210 180
@#$#@#$#@
0
@#$#@#$#@