Notice: On March 31, it was **announced** that Statalist is moving from an email list to a **forum**. The old list will shut down on April 23, and its replacement, **statalist.org** is already up and running.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
Lloyd Dumont <lloyddumont@yahoo.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Intraclass Correlation for an Independent Variable? |

Date |
Wed, 11 Aug 2010 13:36:01 -0700 (PDT) |

Hello. I have gotten a confusing note from a reviewer, confusing in part because I think he/she is using the wrong terminology. In a nutshell… I am running a cross-sectional time series model (on a dataset of plant-months) of a continuous variable Y measured at the plant level where the focal, continuous independent variable is X. X is also at the plant-level, but is time-constant. X is formed by taking the mean level of X from all of the individual workers in each plant. The reviewer suggests that I include some measure of within versus between plant variance in X. This would bolster the case that there is a genuine difference across plants rather than average differences simply reflecting noise. He/she then goes on to suggest I do this by reporting intraclass correlations (ICCs). As far as I understand it, ICCs (or rho) describe the variance in Y, not X. If I am right, then the reviewer did not mean ICC. Rather, he/she wants me to go back to the dataset of individuals (not plant-months) and wants me to run some simple analysis to show that there is clustering of values for X by clinic. Am I correctly understanding what the reviewer is asking for? And, if so, what is the simplest way to demonstrate the sort of dependence he/she is hoping to see? Thank you for your help. Lloyd * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Intraclass Correlation for an Independent Variable?***From:*Steve Samuels <sjsamuels@gmail.com>

- Prev by Date:
**Re: st: RE: FW: producing value labels when value has decimal point** - Next by Date:
**st: RE: RE: FW: producing value labels when value has decimal point** - Previous by thread:
**st: FW: producing value labels when value has decimal point** - Next by thread:
**Re: st: Intraclass Correlation for an Independent Variable?** - Index(es):