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I have a few questions where I'm trying to show if things are true or false. I'll say upfront that these are homework so I'd rather not get the entire answer just someone to point me in the right direction. So here we go,

If $y = x \beta + e\text{ and } E(e|x) = 0, \text{ then } E(x^2e) = 0$.

If $y = x \beta + e,\text{ and }E(xe) = 0,\text{ then } E(x^2e) = 0$

Thanks for any help.

Edit: Solved then removed one of them.

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    If you solve one of them, you could leave the question up and post your answer as a solution. Someone else might be interested in how you did it.2011-09-15

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