__R:__

- A brief introduction to Getting started in R is: Rintro.html
- A sample R program (discussed in Rintro.html) is Rexample.R

- A second R program for linear regression and saving output is Rfurtherexample.R
- Several R programs for basic linear regression for the book
*Economics Data: An Introduction to Econometrics*see AED R programs

- For count data regression using R see especially program racd03.R at the website for Regression Analysis of Count Data, second edition.
- For nonparametric and semiparametric regression using R
package np see program racd11.R at the website for Regression
Analysis of Count Data, second edition.

*A. Colin Cameron / UC-Davis Economics / http://www.cameron.econ.ucdavis.edu/*