Landscape Dynamics

Models for Financial Markets

Current versions of our NetLogo models for a market of financial managers: 8.0 is a baseline model, with equilibrium behavior, 8.1 is our workhorse model with bubbles and crashes, while 8.2 and 8.3 and fancy features.

Basic Model, Rev 8.0.03a of 09 January 2007

Users Manual for 8.0.03, PDF (6 pages, 28 KB) Text revised 01 January 2007 Program Guide for 8.0.03, PDF (15 pages, 216 KB) Figures revised 06 September 2006 Text revised 09 January 2007 NetLogo Market Applet rev 8.0.03a (in a new window) NetLogo Market code rev 8.0.03a (to save to disk) Features of this model: we have only one state, normal (set by slider, gs1) sliders for R0, dR (Rs = R0 + dR), and c2 R0, Rs, and R1 are shown in monitors z is not normalized, z adjustment uses gross yield mean-u is z-weighted, u adjustment uses net yield number of substeps in a step is set by a chooser, "u-steps" color bar shows slope (positive=red, near-zero=yellow, negative=green) yellow-width slider for width of yellow in color-bar mean queen shows (mean-u, mean-z) yellow king shows cluster point u* Newton method for u* (position of yellow-king) plots for density, landscape, and detrended price, DPM: Text revised 01 January 2007
Program Guide for 8.0.03, PDF (15 pages, 216 KB) Figures revised 06 September 2006 Text revised 09 January 2007 NetLogo Market Applet rev 8.0.03a (in a new window) NetLogo Market code rev 8.0.03a (to save to disk) Features of this model: we have only one state, normal (set by slider, gs1) sliders for R0, dR (Rs = R0 + dR), and c2 R0, Rs, and R1 are shown in monitors z is not normalized, z adjustment uses gross yield mean-u is z-weighted, u adjustment uses net yield number of substeps in a step is set by a chooser, "u-steps" color bar shows slope (positive=red, near-zero=yellow, negative=green) yellow-width slider for width of yellow in color-bar mean queen shows (mean-u, mean-z) yellow king shows cluster point u* Newton method for u* (position of yellow-king) plots for density, landscape, and detrended price, DPM: Figures revised 06 September 2006; Text revised 09 January 2007
NetLogo Market Applet rev 8.0.03a (in a new window) NetLogo Market code rev 8.0.03a (to save to disk) Features of this model: we have only one state, normal (set by slider, gs1) sliders for R0, dR (Rs = R0 + dR), and c2 R0, Rs, and R1 are shown in monitors z is not normalized, z adjustment uses gross yield mean-u is z-weighted, u adjustment uses net yield number of substeps in a step is set by a chooser, "u-steps" color bar shows slope (positive=red, near-zero=yellow, negative=green) yellow-width slider for width of yellow in color-bar mean queen shows (mean-u, mean-z) yellow king shows cluster point u* Newton method for u* (position of yellow-king) plots for density, landscape, and detrended price, DPM
NetLogo Market code rev 8.0.03a (to save to disk) Features of this model: we have only one state, normal (set by slider, gs1) sliders for R0, dR (Rs = R0 + dR), and c2 R0, Rs, and R1 are shown in monitors z is not normalized, z adjustment uses gross yield mean-u is z-weighted, u adjustment uses net yield number of substeps in a step is set by a chooser, "u-steps" color bar shows slope (positive=red, near-zero=yellow, negative=green) yellow-width slider for width of yellow in color-bar mean queen shows (mean-u, mean-z) yellow king shows cluster point u* Newton method for u* (position of yellow-king) plots for density, landscape, and detrended price, DPM
Features of this model: we have only one state, normal (set by slider, gs1) sliders for R0, dR (Rs = R0 + dR), and c2 R0, Rs, and R1 are shown in monitors z is not normalized, z adjustment uses gross yield mean-u is z-weighted, u adjustment uses net yield number of substeps in a step is set by a chooser, "u-steps" color bar shows slope (positive=red, near-zero=yellow, negative=green) yellow-width slider for width of yellow in color-bar mean queen shows (mean-u, mean-z) yellow king shows cluster point u* Newton method for u* (position of yellow-king) plots for density, landscape, and detrended price, DPM

First extension, Model 8.1.02-05 of 18 Dec 2006

Users Manual for 8.1.02-05, PDF (7 pages, 28 KB)
Text revised 18 December 2006
Program Guide for 8.1.02-05, PDF (12 pages, 216 KB)
Figures revised 06 September 2006
Text revised 09 January 2007
NetLogo Market Applet rev 8.1.02a (in a new window)
NetLogo Market code rev 8.1.02a (to save to disk)
New features of this model:

surprise, button to show jiggle x 10
sliders for surprise and loss parameters
local loss, Lhat, is incremented only when payoff is negative (-L)
slider for loss-redline (larger losses make manager turn red)
local Lhat not z-weighted
global mean-Lhat is z-weighted
c2 = beta * mean-Lhat (rather than set by a slider)

The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk)

has two rewind buttons
clears all three plots on rewinding
writes price-history data to a file
has a slider for managers' turtle size
has a slider for "alpha": Text revised 18 December 2006
Program Guide for 8.1.02-05, PDF (12 pages, 216 KB)
Figures revised 06 September 2006
Text revised 09 January 2007
NetLogo Market Applet rev 8.1.02a (in a new window)
NetLogo Market code rev 8.1.02a (to save to disk)
New features of this model:

surprise, button to show jiggle x 10
sliders for surprise and loss parameters
local loss, Lhat, is incremented only when payoff is negative (-L)
slider for loss-redline (larger losses make manager turn red)
local Lhat not z-weighted
global mean-Lhat is z-weighted
c2 = beta * mean-Lhat (rather than set by a slider)

The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk)

has two rewind buttons
clears all three plots on rewinding
writes price-history data to a file
has a slider for managers' turtle size
has a slider for "alpha": Figures revised 06 September 2006; Text revised 09 January 2007
NetLogo Market Applet rev 8.1.02a (in a new window)
NetLogo Market code rev 8.1.02a (to save to disk)
New features of this model:

surprise, button to show jiggle x 10
sliders for surprise and loss parameters
local loss, Lhat, is incremented only when payoff is negative (-L)
slider for loss-redline (larger losses make manager turn red)
local Lhat not z-weighted
global mean-Lhat is z-weighted
c2 = beta * mean-Lhat (rather than set by a slider)

The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk)

has two rewind buttons
clears all three plots on rewinding
writes price-history data to a file
has a slider for managers' turtle size
has a slider for "alpha"
NetLogo Market code rev 8.1.02a (to save to disk)
New features of this model:

surprise, button to show jiggle x 10
sliders for surprise and loss parameters
local loss, Lhat, is incremented only when payoff is negative (-L)
slider for loss-redline (larger losses make manager turn red)
local Lhat not z-weighted
global mean-Lhat is z-weighted
c2 = beta * mean-Lhat (rather than set by a slider)

The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk)

has two rewind buttons
clears all three plots on rewinding
writes price-history data to a file
has a slider for managers' turtle size
has a slider for "alpha"
New features of this model:

surprise, button to show jiggle x 10
sliders for surprise and loss parameters
local loss, Lhat, is incremented only when payoff is negative (-L)
slider for loss-redline (larger losses make manager turn red)
local Lhat not z-weighted
global mean-Lhat is z-weighted
c2 = beta * mean-Lhat (rather than set by a slider)

The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk)

has two rewind buttons
clears all three plots on rewinding
writes price-history data to a file
has a slider for managers' turtle size
has a slider for "alpha"
The next version does not run as an applet !!!
NetLogo Market code rev 8.1.05b, of 31 Dec 2006 (to save to disk) has two rewind buttons clears all three plots on rewinding writes price-history data to a file has a slider for managers' turtle size has a slider for "alpha"

Second extension, Model 8.2.04e of 08 Sept 2007

Users Manual for 8.2.04, PDF (6 pages, 28 KB) Program Guide for 8.2.04, rev 13 july 2007, PDF (6 pages, 247 KB) NetLogo Market code rev 8.2.04e (to save to disk) New features of this model: fickle investors !!! new sliders for d, lambda, and rate new global variable, z-pool, with monitor new managers own variable, Rhat logit expression for update-managers-z
Program Guide for 8.2.04, rev 13 july 2007, PDF (6 pages, 247 KB) NetLogo Market code rev 8.2.04e (to save to disk) New features of this model: fickle investors !!! new sliders for d, lambda, and rate new global variable, z-pool, with monitor new managers own variable, Rhat logit expression for update-managers-z
NetLogo Market code rev 8.2.04e (to save to disk) New features of this model: fickle investors !!! new sliders for d, lambda, and rate new global variable, z-pool, with monitor new managers own variable, Rhat logit expression for update-managers-z
New features of this model: fickle investors !!! new sliders for d, lambda, and rate new global variable, z-pool, with monitor new managers own variable, Rhat logit expression for update-managers-z

Third extension, Model 8.3.05 of 23 September 2006

Users Manual for 8.3.05, PDF (1 page, 16 KB) Program Guide for 8.3.05, PDF (3 pages, 48 KB) NetLogo Market Applet rev 8.3.05 (in a new window) NetLogo Market code rev 8.3.05 (to save to disk) New features of this model: zmax headroom (gravity, elimination of zmax) add slider for gravity death and rebirth of unlucky managers add monitors for deaths and sum-zRhat
Program Guide for 8.3.05, PDF (3 pages, 48 KB) NetLogo Market Applet rev 8.3.05 (in a new window) NetLogo Market code rev 8.3.05 (to save to disk) New features of this model: zmax headroom (gravity, elimination of zmax) add slider for gravity death and rebirth of unlucky managers add monitors for deaths and sum-zRhat
NetLogo Market Applet rev 8.3.05 (in a new window) NetLogo Market code rev 8.3.05 (to save to disk) New features of this model: zmax headroom (gravity, elimination of zmax) add slider for gravity death and rebirth of unlucky managers add monitors for deaths and sum-zRhat
NetLogo Market code rev 8.3.05 (to save to disk) New features of this model: zmax headroom (gravity, elimination of zmax) add slider for gravity death and rebirth of unlucky managers add monitors for deaths and sum-zRhat
New features of this model: zmax headroom (gravity, elimination of zmax) add slider for gravity death and rebirth of unlucky managers add monitors for deaths and sum-zRhat

Revised 13 July 2007 by Ralph Abraham