Hello,
 
I've try to install CEM software using following command:
1. install.packages("cem",repos="http://gking.harvard.edu")
2. install.packages("cem")
 
Neither one of them worked.   It gave me an error saying that "Installing package into ‘C:/Users/limsuxa/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
Warning message:
package ‘cem’ is not available (for R version 3.0.2) "
 
I will really appreciate any help on this.  
Thank you