Whether you are concerned with strict statistical representation, enhanced sample
productivity, or a fair balance of both we have a solution for you! And, our customizable
list of options including stratification, working block screening rate, record code
appending, frame element suppression, etc. is state-of-the-art.
Overview of RDD & its use
- EPSEM (Type A) – Pure probability/highly representative
- Weighted (Type B) – More Efficient
- Two-stage designs
- Cell phone\wireless
- RDD run-time options
Good RDD samples begin with careful attention to the fundamentals, which means building
the most accurate sampling frame ... updating it constantly … and thinking about
the samples to be run in an old-fashioned, academically-oriented way.
Since we run thousands of samples for hundreds of researchers each year, our professional
staff can make an important contribution to help you decide which type of RDD sample
is best suited for your needs.