We analyze a discrete time two-sector economic growth model where the production technologies in the final and human capital sectors are affected by random shocks both directly (via productivity and factor shares) and indirectly (via a pollution externality). We determine the optimal dynamics in the decentralized economy and show how these dynamics can be described in terms of a two-dimensional affine iterated function system with probability. This allows us to identify a suitable parameter configuration capable of generating exactly the classical Barnsley's fern as the attractor of the log-linearized optimal dynamical system.

1.
Acemoglu
,
D.
and
Restrepo
,
P.
,
Artificial Intelligence, Automation and Work
(
MIT Department of Economics Working Paper Series
,
2018
), Paper No. 18-01.
2.
Barnsley
,
M.
,
Fractals Everywhere
, 2nd ed. (
Academic Press
,
San Diego, CA
,
1993
).
3.
Barnsley
,
M.
,
Ervin
,
V.
,
Hardin
,
D.
, and
Lancaster
,
J.
, “
Solution of an inverse problem for fractals and other sets
,”
Proc. Natl. Acad. Sci. U. S. A.
83
,
1975
1977
(
1986
).
4.
Barro
,
R. J.
and
Sala–i–Martin
,
X.
,
Economic Growth
(
MIT Press
,
Cambridge, MA
,
2004
).
5.
Benhabib
,
J.
and
Perli
,
R.
, “
Uniqueness and indeterminacy: Transitional dynamics in a model of endogenous growth
,”
J. Econ. Theory
63
,
113
142
(
1994
).
6.
Brock
,
W. A.
and
Mirman
,
L. J.
, “
Optimal economic growth and uncertainty: The discounted case
,”
J. Econ. Theory
4
,
479
513
(
1972
).
7.
Hutchinson
,
J.
, “
Fractals and self-similarity
,”
Indiana Univ. J. Math.
30
,
713
747
(
1981
).
8.
IPCC
, “
Climate change 2007: Synthesis report
,” Intergovernmental Panel on Climate Change,
2007
.
9.
Korinek
,
A.
and
Stiglitz
,
J. E.
, “
Artificial intelligence and its implications for income distribution and unemployment
,”
NBER Working Paper No. 24174,
2017
.
10.
Kunze
,
H.
,
La Torre
,
D.
,
Mendivil
,
F.
, and
Vrscay
,
E. R.
,
Fractal-based Methods in Analysis
(
Springer
,
New York
,
2012
).
11.
La Torre
,
D.
,
Marsiglio
,
S.
, and
Privileggi
,
F.
, “
Fractals and self-similarity in economics: The case of a two-sector growth model
,”
Image Anal. Stereol.
30
,
143
151
(
2011
).
12.
La Torre
,
D.
,
Marsiglio
,
S.
,
Mendivil
,
F.
, and
Privileggi
F.
, “
Self-similar measures in multi-sector endogenous growth models
,”
Chaos, Solitons Fractals
79
,
40
56
(
2015
).
13.
La Torre
,
D.
,
Marsiglio
,
S.
,
Mendivil
,
F.
, and
Privileggi
F.
, “
Fractal attractors and singular invariant measures in two-sector growth models with random factor shares
,”
Commun. Nonlinear Sci. Numer. Simul.
58
,
185
201
(
2018
).
14.
Lucas
,
R. E.
, “
On the mechanics of economic development
,”
J. Monetary Econ.
22
,
3
42
(
1988
).
15.
Marsiglio
,
S.
, “
Stochastic shocks in a two-sector solow model
,”
Int. J. Math. Modell. Numer. Optim.
3
,
313
318
(
2012
).
16.
Marsiglio
,
S.
,
Ansuategi
,
A.
, and
Gallastegui
,
M. C.
, “
The environmental kuznets curve and the structural change hypothesis
,”
Environ. Resource Econ.
63
,
265
288
(
2016
).
17.
Marsiglio
,
S.
and
La Torre
,
D.
, “
Economic growth and abatement activities in a stochastic environment: a multi-objective approach
,”
Ann. Oper. Res.
(published online,
2016
).
18.
Mitra
,
T.
,
Montrucchio
,
L.
, and
Privileggi
,
F.
, “
The nature of the steady state in models of optimal growth under uncertainty
,”
Econ. Theory
23
,
39
71
(
2003
).
19.
Mitra
,
T.
and
Privileggi
,
F.
, “
Cantor type invariant distributions in the theory of optimal growth under uncertainty
,”
J. Differ. Eq. Appl.
10
,
489
500
(
2004
).
20.
Mitra
,
T.
and
Privileggi
,
F.
, “
Cantor type attractors in stochastic growth models
,”
Chaos, Solitons Fractals
29
,
626
637
(
2006
).
21.
Mitra
,
T.
and
Privileggi
,
F.
, “
On lipschitz continuity of the iterated function system in a stochastic optimal growth model
,”
J. Math. Econ.
45
,
185
198
(
2009
).
22.
Montrucchio
,
L.
and
Privileggi
,
F.
, “Fractal steady states in stochastic optimal control models,”
Ann. Oper. Res.
88
,
183
197
(
1999
).
23.
Nordhaus
,
W.
, “
Integrated economic and climate modeling
,” in
Handbook of Computable General Equilibrium Modeling
, edited by
Dixon
,
P. B.
and
Jorgenson
,
D.
(
Elsevier
,
Amsterdam
,
2013
), Vol.
1
, pp.
1069
1131
.
24.
Privileggi
,
F.
and
Marsiglio
,
S.
, “
Environmental shocks and sustainability in a basic economy-environment model
,”
Int. J. Appl. Nonlinear Sci.
1
,
67
75
(
2013
).
25.
Rebelo
,
S.
, “
Long-run policy analysis and long-run growth
,”
J. Political Econ.
99
,
500
521
(
1991
).
26.
Soretz
,
S.
, “
Stochastic pollution and environmental care in an endogenous growth model
,”
Manchester School
71
,
448
469
(
2003
).
27.
Vrscay
,
E. R.
, “
Moment and collage methods for the inverse problem of fractal construction with iterated function systems
,” in
Fractals in the Fundamental and Applied Sciences
, edited by
Peitgen
,
H. O.
,
Henriques
,
J. M.
, and
Penedo
,
L. F
. (
North-Holland
,
Amsterdam
,
1991
), pp.
443
461
.
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