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132 

A Summary of 

New Approaches to Macroeconomic Modeling  by  ProfisorMasanao Aoki (University of California at LA) 

delivered on December 17, 1997 

1eBook (entitled New Approach目 的MacroeconomicModeling: Evolutionary  Stochastic

namics,Muli

leEquilibria, and Externalities as Field

7ects,Manao Aoki, Cambndge University P<S,New York, 1996) analyzes. shemarket m which  large number of participants employ one of two types of strategies, and in which  pticipantsare subject to social influences or they exhibit herd

ikebehav10r. 

The number of agents of each type evolve with time. Pric白 血dvolumes to clear 

emarket also chgewith time. These dyn鉱 世 田arecaused in part by agen

chang mg their strategies in response to past performances and to the fractions of agents of  each time. These chgesare modeled by jump Markov processIna simple case,  the number of agents are mdependent Poisson random variables In shghtly more  interesting case

enumber of one type of agents are P01sson random variables, and  the other is conditionally Poisson, given

enumber of the one type of agents 

Key Words Eqmlibrium Dis

bution,Transition Rates, Jump Markov Processes.  [Applicant Professor KAIZOJJ, Tais

白 ]

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