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Sökning: swepub > Umeå universitet > Engelska > Övrigt vetenskapligt > Puu Tönu 1936

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1.
  • Puu, Tönu, 1936-, et al. (författare)
  • On the Change of Periodicities in the Hicksian Multiplier-Accelerator Model with a Consumption Floor
  • 2006
  • Ingår i: Chaos, Solitons & Fractals. - 0960-0779. ; 29:3, s. 681-696
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • The Hicksian multiplier-accelerator model with “floor” and “ceiling” continues to be the most successful machine generating business cycles. This is, no doubt, due to its capability of explaining both downturn and upswing through one single model. The “ceiling” is due to a full employment constraint, whereas the “floor” is due to a limit to disinvestment when no worn out capital at all is replaced. However, another “floor” to consumption at zero level seems never to have been discussed. Hence, net disinvestments, even if they are bounded downwards, may also give rise to negative consumption, which is absurd. As we will show, the effect of an additional constraint to avoid this is easy to analyze, and results in a change of the periodicities according to a simple rule.
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2.
  • Sushko, Irina, et al. (författare)
  • The Hicksian floor–roof model for two regions linked by interregional trade
  • 2003
  • Ingår i: Chaos, Solitons & Fractals. - 0960-0779. ; 18:3, s. 593-612
  • Tidskriftsartikel (övrigt vetenskapligt)abstract
    • The Hicksian multiplier–accelerator model with the original floor–roof limits to investments is studied for the case of two regions linked by interregional trade. The result is a piecewise linear continuous four dimensional map, which is reduced to three dimensions through the choice of an appropriate distributed consumption lag. The attractors, basins, and bifurcations of the map are studied under the assumption of a certain symmetry between the regions. The Neimark–Hopf bifurcation for piecewise linear maps is described in detail which gives rise to the appearance of an attracting closed invariant curve homeomorphic to a circle. The structure of resonance regions in the parameter space are investigated.
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5.
  • Agliari, Anna, et al. (författare)
  • Global Bifurcations in Duopoly when the Cournot Point is Destabilized through a Subcritical Neimark Bifurcation
  • 2003
  • Rapport (övrigt vetenskapligt)abstract
    • An adaptive oligopoly model, where the demand function is isoelastic and the competitors operate under constant marginal costs, is considered. The Cournot equilibrium point then loses stability through a subcritical Neimark bifurcation. The present paper focuses some global bifurcations, which precede the Neimark bifurcation, and produce other attractors which coexist with the still attractive Cournot fixed point.
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9.
  • Puu, Tönu, 1936-, et al. (författare)
  • A Business Cycle Model with Cubic Nonlinearity
  • 2002
  • Rapport (övrigt vetenskapligt)abstract
    • This paper deals with a simple multiplier-accelerator model of the business cycle, including a cubic nonlinearity. The corresponding two dimensional iterative map is represented in terms of its bifurcation diagram in parameter space. A number of bifurcation sequences for attractors and their basins are studied.
10.
  • Puu, Tönu, 1936- (författare)
  • A century of oligopoly theory 1838-1941
  • 2002
  • Ingår i: OLIGOPOLY DYNAMICS : MODELS AND TOOLS. - BERLIN : SPRINGER-VERLAG BERLIN. - 3-540-43186-1 ; s. 1-14
  • Konferensbidrag (övrigt vetenskapligt)
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