Waterstone, however, posted the anonymous message on the Artists for Justice site and included it in an e-newsletter to subscribers. Waterstone exercised some discretion in choosing which messages to post and send to subscribers, generally omitting those that were unrelated to stolen art. Does Heigl have a valid defamation claim against Waterstone and her website?

a. No, service providers will not be liable for content provided by someone else.
b. Yes, internet service providers will always be liable for defamatory content.
c. No, because the service provider had not been notified that the allegations were untrue.
d. Yes, because the service provider selected which content to post and send to subscribers.

David consumes two things: gasoline (g) and bread (b). david's utility function is u(g, b) = 10g^0.25 b^0.75. use the lagrange technique to solve for david's optimal choices of gasoline and bread as a function of the price of gasoline, p_g, the price of bread, p_b, and his income m. with recent decrease in the price of gasoline (maybe due to external shock such as shale gas production) does david increase his consumption of gasoline? for david, how does partial differential g/partial differential p_g depend on his income m? that is, how does david's change in gasoline consumption due to an increase in the price of gasoline depend on his income level? to answer these questions, find the cross-partial derivative, |partial differential^2 g/partial differential m partial differential p_g.