We have a data set which includes, for each of 96 cities, 4 estimates
of the number of drug injectors in that city. Each of these estimates
We ran a factor analysis to determine their commonality.
We now wish to use the results of this analysis to come up with a
better estimate of the number of drug injectors in each city.
It seems intuitively reasonable to multiply the standardized scoring
coefficients by the estimates, add these together, and then divide by
the sum of the standardized scoring coefficients. I've even seen this
done. But I haven't seen a good proof that this is correct (it may not
Any advice on how to proceed will be appreciated.
Thanks in advance
Peter L. Flom, PhD
Assistant Director, Statistics and Data Analysis Core
Center for Drug Use and HIV Research
National Development and Research Institutes
71 W. 23rd St
New York, NY 10010
(212) 845-4485 (voice)
(917) 438-0894 (fax)