PMG {PooledMeanGroup}

PMG

Description

Having particular long-run parameters (exp. start values) estimates parameters of short-run relationships as well as standard errors of estimations, Student's t-distribution type statistics, probs, confidence intervals. Also performs diagnostic tests of error terms, such as autocorrelation, heteroscedasticity and normality

Usage

PMG(paramTeta, vecSR, vecLR, dataset, quantity, const)

Arguments

paramTeta

the vector of parameters of long-run relationships, as outlined in Equation 7 (Pesaran, Shin and Smith, 1999)

vecSR

a list of vectors containing the column numbers of variables in short-run relationships for each group (alternatively a list of vectors containing the variables names instead of column numbers). In each vector of the list the first number must indicate dy (i.e., the dependant variable)

vecLR

a vector containing the column numbers of variables in long-run relationships (alternatively a vector containing the variables names instead of column numbers). The first number must indicate ly (i.e., the lagged dependant variable)

dataset

a panel data set in the form of stacked time series, containing variables of long-run and short-run relationships (i.e., including differentiated and lagged variables)

quantity

a vector of the number of time series observations in each group; in practice, it takes the form c(T1,...,Tn) since the PMG allows the numbers of time series observations to differ freely across groups (if the number of time series observations in each group is the same, then c(T,...,T) and T=T1=T2=...=Tn

const

logical. If TRUE (the default value), the intercept term is added to the model (i.e., to the short-run relationship)

Details

Having particular long-run parameters estimates parameters of short-run relationships. Also estimates the information matrix as well as standard errors of estimations, as indicated in Equation 13 (Pesaran, Shin and Smith, 1999). Calculates Student's t-distribution type statistics, probs and confidence intervals. Also performs diagnostic tests of error terms, such as the Breusch-Godfrey autocorrelation test, the Goldfeld-Quandt heteroscedasticity test and the Conover nonparametric test of homogeneity of variance and the Jarque-Bera normality test

Value

$LogL

the concentrated log-likelihood function

$LR

parameters of long-run relationships

$SR

the estimated parameters of short-run relationships

$DiagTests

results of diagnostic tests

$residuals

residuals

Author(s)

Lech Kujawski, Piotr Zientara

References

Pesaran, Shin and Smith (1999) <doi:10.1080/01621459.1999.10474156>

Examples

# first import DataExp, i=1...9, T1=T2=...T9=35
data(DataExp)
DataExp[1:5,]
# then prepare lags and diffs using LagPanel and DiffPanel
y10=data.frame(y10=DataExp[,1], row.names=row.names(DataExp))
cpi=data.frame(cpi=DataExp[,7], row.names=row.names(DataExp))
dy10=DiffPanel(variable=y10, quantity=rep(35,9))
dopeness=DiffPanel(variable=DataExp[,6], quantity=rep(35,9))
ly10=LagPanel(variable=y10, quantity=rep(35,9))
diip=DiffPanel(variable=DataExp[,11], quantity=rep(35,9))
dcrisk=DiffPanel(variable=DataExp[,9], quantity=rep(35,9))
ldcrisk=LagPanel(variable=dcrisk, quantity=rep(35,9))
dcpi=DiffPanel(variable=DataExp[,7], quantity=rep(35,9))
ddcpi=DiffPanel(variable=dcpi, quantity=rep(35,9))
ldebt=LagPanel(variable=DataExp[,4], quantity=rep(35,9))
# create homogenous preliminary dataset (containing "NA" as a result of DiffPanel, LagPanel)
dataPanel=cbind(y10, dy10, ly10, DataExp[,6], dopeness, diip,
DataExp[,11], ldcrisk, DataExp[,9], ddcpi, DataExp[,7])
dataPanel=data.frame(dataPanel)
names(dataPanel)=c("y10", "dy10", "ly10", "openess", "dopeness", "diip",
"iip", "ldcrisk", "crisk", "ddcpi", "cpi")
dataPanel[1:5,]
# prepare dataset and quantity for PMG or optimPMG functions using PanelNaOmit
dataPanel=PanelNaOmit(dataset=dataPanel, quantity=rep(35,9))
dataPanel$dataset[1:5,]
dataPanel$quantity
# PMG
PmgExp=PMG(
paramTeta=c(-14.22768, -23.84427, -0.75717, 27.57753),
vecSR=list(SR1=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR2=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR3=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR4=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR5=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR6=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR7=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR8=c("dy10","dopeness","diip","ldcrisk","ddcpi"),
SR9=c("dy10","dopeness","diip","ldcrisk","ddcpi")),
vecLR=c("ly10","openess","iip","crisk","cpi"),
dataset=dataPanel$dataset,
quantity=dataPanel$quantity,
const=TRUE)
PmgExp