您好！使用动态空间计量模型对问题进行估计时，同时使用的是矩估计的方法，如何实现那个AR（1）和AR(2)的检验呢？相应的代码是什么？

今日解答1

AR(1)，AR(2)是用来检验动态面板，如差分或系统GMM是否存在扰动项一阶和二阶自相关的。动态空间计量模型的使用未见推广的这些检验。空间计量中有SAR模型，即空间自相关(回归)模型。动态空间计量，动态空间面板模型的构建与检验仍然处在前沿的研究阶段，Elhost（2010）对Arrelano和bond的差分GMM估计量进行扩展，使其包括一个内生交互效应，且同时发现这种估计量仍然可能存在严重的偏误，特别是Wyt的参数的估计。

Kukenova andMonteiro（2009）、Jacobs et al（2009）同时研究了动态面板数据模型（Yt-1，Wyt-1），并扩展了Blundell and Bond（1998）的系统GMM估计，使之包含内生交互效应（Wyt），前者同时研究了内生解释变量Zt，后者研究了误差项的空间自相关Wt。他们发现系统GMM估计量要优于差分GMM，且减小了参数估计。

动态空间面板模型的stata程序如下：

 

clear *清空
ssc install spregdpd(or spregdhp) *安装spregdpd或spregdhp动态空间面板模板
help spregdpd(or spregdhp) *参阅帮助文件（有案例）

 

help输出：

Title+-------------------------------------------------------------

spregdpd: Spatial Panel Arellano-Bond Linear Dynamic Regression:Lag & Durbin Mo

> dels

Syntax+------------------------------------------------------------

spregdpd depvarindepvars [weight] , nc(#) wmfile(weight_file)

[ model(sar|sdm)run(xtabond|xtdhp|xtdpd|xtdpdsys) be fe re

lmspac lmhet lmnormdiag tests stand inv inv2 mfx(lin, log)

noconstant

predict(new_var)resid(new_var) inst(vars) diff(vars) endog(vars)

pre(vars)

dgmmiv(varlist) collzero tolog twostep level(#) vce(vcetype) ]

Model Options +-----------------------------------------------------

1- model(sar) MLE Spatial Panel Lag Model (SAR)

2- model(sdm) MLE Spatial Panel Durbin Model (SDM)

Run Options+-------------------------------------------------------

1- run(xtdhp) [NEW]Han-Philips (2010) Linear Dynamic Panel Regression

2- run(xtabond) [xtabond]Arellano-Bond Linear Dynamic Panel Regression

3- run(xtdpd) [xtdpd]Arellano-Bond (1991) Linear Dynamic Panel Regression

4- run(xtdpdsys) [xtdpdsys] Arellano-Bover/Blundell-Bond (1995, 1998)

System Linear Dynamic Panel Regression

Options+-----------------------------------------------------------

* nc(#) Number of Cross Sections Units

Time series observationsmust be Balanced in each Cross Section

 

wmfile(weight_file) OpenCROSS SECTION weight matrix file.

…..

tests display ALLlmh, lmn, lmsp, diag tests

twostep two-step estimate run(xtdpd)

dgmmiv(varlist) GMM Instruments for DifferencedEquation run(xtdpd)

inst(varlist) Additional Instrumental Variablesrun(xtabond)

Dependent Variable Lag length is lag(1)

diff(varlist) Already Differenced ExogenousVariables run(xtabond)

endog(varlist) Endogenous Variables run(xtabond,xtdpdsys)

pre(varlist) Predetermined Variablesrun(xtabond, xtdpdsys)

vce(vcetype) ols,robust, cluster, bootstrap, jackknife, hc2, hc3

level(#) confidence intervals level; default islevel(95)

Spatial Panel Aautocorrelation Tests+------------------------------

lmspac Spatial Panel Aautocorrelation Tests:

* Ho: Error has NoSpatial AutoCorrelation

Ha: Error has Spatial AutoCorrelation
*** Spatial Econometrics Regression Models:
--------------------------------------------------------------------------------
*** (1) Spatial Panel Data Regression Models:
spregxt Spatial Panel Regression Econometric Models:Stata Module Toolkit
gs2slsxt Generalized Spatial Panel 2SLS Regression
gs2slsarxt Generalized Spatial Panel Autoregressive 2SLS Regression
spglsxt Spatial Panel Autoregressive Generalized LeastSquares Regression
spgmmxt Spatial Panel Autoregressive GeneralizedMethod of Moments Regression
spmstarxt (m-STAR) Spatial Lag Panel Models
spmstardxt (m-STAR) Spatial Durbin Panel Models
spmstardhxt (m-STAR) Spatial Durbin MultiplicativeHeteroscedasticity Panel Models
spmstarhxt (m-STAR) Spatial Lag Multiplicative HeteroscedasticityPanel Models
spregdhp Spatial Panel Han-Philips Linear DynamicRegression: Lag & Durbin Models
spregdpd Spatial Panel Arellano-Bond Linear DynamicRegression: Lag & Durbin Models
spregfext Spatial Panel Fixed Effects Regression: Lag & DurbinModels
spregrext Spatial Panel Random Effects Regression: Lag &Durbin Models
spregsacxt MLE Spatial AutoCorrelation Panel Regression (SAC)
spregsarxt MLE Spatial Lag Panel Regression (SAR)
spregsdmxt MLE Spatial Durbin Panel Regression (SDM)
spregsemxt MLE Spatial Error Panel Regression (SEM)
--------------------------------------------------------------------------------
*** (2) Spatial Cross Section Regression Models:
spregcs Spatial Cross Section Regression EconometricModels: Stata Module Toolkit
gs2sls Generalized Spatial 2SLS Cross SectionsRegression
gs2slsar Generalized Spatial Autoregressive 2SLS CrossSections Regression
gs3sls Generalized Spatial 3SLS Cross SectionsRegression
gs3slsar Generalized Spatial Autoregressive 3SLS CrossSections Regression
spautoreg Spatial Cross Section Regression Models
spgmm Spatial Autoregressive GMM CrossSections Regression
spmstar (m-STAR) Spatial Lag Cross Sections Models
spmstard (m-STAR) Spatial Durbin Cross Sections Models
spmstardh (m-STAR) Spatial Durbin MultiplicativeHeteroscedasticity Cross Sections Models
spmstarh (m-STAR) Spatial Lag MultiplicativeHeteroscedasticity Cross Sections Models
spregsac MLE Spatial AutoCorrelation Cross SectionsRegression (SAC)
spregsar MLE Spatial Lag Cross Sections Regression(SAR)
spregsdm MLE Spatial Durbin Cross Sections Regression(SDM)
spregsem MLE Spatial Error Cross Sections Regression(SEM)
--------------------------------------------------------------------------------
*** (3) Tobit Spatial Regression Models:
*** (3-1) Tobit Spatial Panel Data Regression Models:
sptobitgmmxt Tobit Spatial GMM Panel Regression
sptobitmstarxtTobit (m-STAR) Spatial Lag Panel Models
sptobitmstardxtTobit (m-STAR) Spatial Durbin Panel Models
sptobitmstardhxtTobit (m-STAR) Spatial Durbin Multiplicative HeteroscedasticityPanel Models
sptobitmstarhxtTobit (m-STAR) Spatial Lag Multiplicative HeteroscedasticityPanel Models
sptobitsacxt Tobit MLE Spatial AutoCorrelation (SAC) Panel Regression
sptobitsarxt Tobit MLE Spatial Lag Panel Regression
sptobitsdmxt Tobit MLE Spatial Panel Durbin Regression
sptobitsemxt Tobit MLE Spatial Error Panel Regression
spxttobit Tobit Spatial Panel Autoregressive GLS Regression
--------------------------------------------------------------
*** (3-2) Tobit Spatial Cross Section Regression Models:
sptobitgmm Tobit Spatial GMM Cross Sections Regression
sptobitmstar Tobit (m-STAR) Spatial Lag Cross Sections Models
sptobitmstardTobit (m-STAR) Spatial Durbin Cross Sections Models
sptobitmstardhTobit (m-STAR) Spatial Durbin Multiplicative HeteroscedasticityCross Sections
sptobitmstarhTobit (m-STAR) Spatial Lag Multiplicative Heteroscedasticity CrossSections
sptobitsac Tobit MLE AutoCorrelation (SAC) Cross Sections Regression
sptobitsar Tobit MLE Spatial Lag Cross Sections Regression
sptobitsdm Tobit MLE Spatial Durbin Cross Sections Regression
sptobitsem Tobit MLE Spatial Error Cross Sections Regression
--------------------------------------------------------------------------------
*** (4) Spatial Weight Matrix:
spcs2xt Convert Cross Section to Panel Spatial WeightMatrix
spweight Cross Section and Panel Spatial Weight Matrix
spweightcs Cross Section Spatial Weight Matrix
spweightxt Panel Spatial Weight Matrix

José-AntonioMonteiro & Madina Kukenova, 2009. "Spatial Dynamic PanelModel and System GMM: A Monte Carlo Investigation," IRENE Working Papers 09-01, IRENE Institute of EconomicResearch.