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Econometrics is the application of statistical methods to economic data for various purposes such as of testing hypotheses, infering causal relationships and forecasting future trends. Only use this tag for questions relating to the theoretical aspect of an econometric technique.
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votes
How to interpret Whited Wu index (WW-index)
In the question, answers, and comments, I saw a few references to the potential problem/issue with negative WW index values. Since this caused me some trouble years ago, let me share with you what I f …