ABCs (and Ds) of Understanding VARs
ABCs (and Ds) of Understanding VARs
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理解 VAR 的基本知识(和 D)
DOI:
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发表时间:
2007
期刊:
影响因子:
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通讯作者:
M. Watson
中科院分区:
文献类型:
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作者:
Jesús Fernández;J. Rubio;T. Sargent;M. Watson
The dynamics of a linear (or linearized) dynamic stochastic economic model can be expressed in terms of matrices (A, B, C, D) that define a state space system for a vector of observables. An associated state space system (A,ˆB,C,ˆD) determines a vector autoregression for those same observables. We present a simple condition for checking when these two state space systems match up and when they do not when there are equal numbers of economic and VAR shocks. We illustrate our condition with a permanent income example. (JEL C32, E32)