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how to extract p-value in GenMatch function
3 messages · Peter Ehlers, shyam basnet
On 2012-07-15 14:37, shyam basnet wrote:
Dear R-Users,
I have a problem on extracting T-Stat and P-Value. I have written R-code below
library("Matching")
data("lalonde")
attach(lalonde)
names(lalonde)
Y<- lalonde$re78
Tr<- lalonde$treat
glm1<- glm(Tr~age+educ+black+hisp+married+nodegr+re74+re75,family=binomial,data=lalonde)
pscore.predicted<- predict(glm1)
rr1<- Match(Y=Y,Tr=Tr,X=glm1$fitted,estimand="ATT", M=1,ties=TRUE,replace=TRUE)
summary(rr1)
summary(rr1)
Estimate... 2624.3 AI SE...... 802.19 T-stat..... 3.2714 p.val...... 0.0010702 Original number of observations.............. 445 Original number of treated obs............... 185 Matched number of observations............... 185 Matched number of observations (unweighted). 344 In above output, I can extract "Estimate" and "AI SE" with below code: rr1$est rr1$se But the problem is I could not extract T-statistic and P-value from the above output. Could you please someone help me to resolve this problem?
You could look at the code for summary.Match to see that T-stat (not surprisingly) is calculated as est/se and p.val is calculated as (1 - pnorm(abs(est/se))) * 2. summary.Match() doesn't return these values, it just prints them. Peter Ehlers
Thanking you, Best Regards, Shyam Basnet SLU, Uppsala, Sweden [[alternative HTML version deleted]]
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