U N D E R C O N S T R U C T I O N …
Please check these links for now…
R
http://www.r-project.org/
http://gking.harvard.edu/zelig/docs/index.html
http://gking.harvard.edu/zelig/docs/zelig.pdf
http://people.hmdc.harvard.edu/~mathpre/r/RMathCamp04.pdf