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80 / 20 SALES AND MARKETING / Perry Marshall

Perry Marshall is a famous and very active business consultant. The book is based on the well-known Pareto principle, known as the 80/20 rule. By this rule "80% of the results are generated by 20% of the clients". From the point of casino marketing the book is very useful, even more that in some casinos, this distribution may become sometimes even more distorted, getting closer to 90/10.