具有相互作用的简单经济模型

M. Gusev, Dimitri Kroujiline
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引用次数: 1

摘要

宏观经济模型很少能明确地说明代理人实际上是如何相互作用的。然而,如果明确指定相互作用,则模型的微观和宏观属性之间的联系将变得更加丰富,从而在某些情况下导致宏观层面的不稳定。本文将微观层面上主体间的相互作用纳入基本索洛模型,研究宏观层面上的非均衡行为和经济不稳定。特别地,我们研究了两种极限情况。首先,我们恢复了经济向平衡增长路径趋同并沿着平衡增长路径增长的经典案例。在第二种情况下,由相互作用推动的需求动态成为推动经济的主要力量,我们获得了准周期性内生波动的商业周期。
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A Simple Economic Model with Interactions
Macroeconomic models rarely make explicit how agents actually interact. If however interaction is explicitly specified, the link between the micro and macro properties of models becomes much richer, leading in certain cases to the onset of macro-level instability. This working paper incorporates interactions among agents at a micro level into the basic Solow model to study disequilibrium behaviors and economic instability on a macro level. In particular, we investigate two limiting cases. First, we recover the classic case where the economy converges to the balanced growth path and then grows along it. In the second case, where the interactions-fueled demand dynamics become the main force driving the economy, we obtain business cycles as quasiperiodic endogenous fluctuations.
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