After the seminal works by Schelling, several authors have considered models representing binary choices by different kinds of agents or groups of people. The role of the memory in these models is still an open research argument, on which scholars are investigating. The dynamics of binary choices with impulsive agents has been represented, in the recent literature, by a one-dimensional piecewise smooth map. Following a similar way of modeling, we assume a memory effect which leads the next output to depend on the present and the last state. This results in a two-dimensional piecewise smooth map with a limiting case given by a piecewise linear discontinuous map, whose dynamics and bifurcations are investigated. The map has a particular structure, leading to trajectories belonging only to a pair of straight lines. The system can have, in general, only attracting cycles, but the related periods and periodicity regions are organized in a complex structure of the parameter space. We show that the period adding structure, characteristic for the one-dimensional case, also persists in the two-dimensional one. The considered cycles have a symbolic sequence which is obtained by the concatenation of the symbolic sequences of cycles, which play the role of basic cycles in the bifurcation structure. Moreover, differently from the one-dimensional case, the coexistence of two attracting cycles is now possible. The bistability regions in the parameter space are investigated, evidencing the role of different kinds of codimension-two bifurcation points, as well as in the phase space and the related basins of attraction are described.
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December 2019
Research Article|
December 20 2019
Memory effects on binary choices with impulsive agents: Bistability and a new BCB structure
L. Gardini
;
L. Gardini
a)
1
Department of Economics, Society and Politics, University of Urbino
, Via A. Saffi n. 42, 61029 Urbino, Italy
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A. Dal Forno
;
A. Dal Forno
b)
2
Department of Economics, University of Molise
, via F. De Sanctis 1, 86100 Campobasso, Italy
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U. Merlone
U. Merlone
c)
3
Department of Psychology, and Center for Logic, Language and Cognition, University of Torino
, via G. Verdi 10, 10124 Torino, Italy
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a)
Electronic mail: laura.gardini@uniurb.it
b)
Electronic mail: arianna.dalforno@unimol.it
c)
Electronic mail: ugo.merlone@unito.it
Chaos 29, 123133 (2019)
Article history
Received:
July 18 2019
Accepted:
November 26 2019
Citation
L. Gardini, A. Dal Forno, U. Merlone; Memory effects on binary choices with impulsive agents: Bistability and a new BCB structure. Chaos 1 December 2019; 29 (12): 123133. https://doi.org/10.1063/1.5120472
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