Econometrics may be defined as the quantitative analysis of actual economic phenomena based on the concurrent development of theory and observation, related by appropriate methods of inference.
The sad truth is that it is precisely those who disagree most with the hypothesis of efficient market pricing of stocks, those who pooh-pooh beta analysis and all that, who are least able to understand the analysis needed to test that hypothesis.
Kelsoism is not accepted by modern scientific economics as a valid and fruitful analysis of the distribution of income but rather it is regarded as an amateurish and cranky fad.