Instruct: Classify the given Amazon review as either positive or negative.
Query: not good with house keeping

I was reading the 2nd chapter where the math appeared the first time in the book. On Page 37, the equation #'s are completely messed up! For example, on Page 37, the author is referring to Equation (2.6): Where the hell is Equation (2.6) up to this page?! Of course, I am smart enough to figure out that it's actually referring to Equation (2.5).Another detail: on Page 28 (Section 2.2), the 2nd bullet point. Here is TWO original quotes from this page.ONE: "The price of a commodity and its volatility are positively correlated..."Two: "We will call the inverse leverage effect the negative relationship between commodity prices and their volatility."So what's the relationship between commodity prices and their volatility? Acoording to ONE, they are POSITIVELY correlated; however, by TWO, they have a negative relationship.Does it take TWO PhDs to make mistakes like those above? (I am wondering how did she do her PhDs. It would be fun to read her thesis)