If there are two goods, if a consumer prefers more of each good to less, and if she has diminishing marginal rate of substitution, then her preferences are convex.
【简答题】Why do we send selfies? Do we genuinely think that’s the best way to let friends in on what’s going on in our lives and how we’re feeling when an emoji just won’t do? I’ve been thinking about selfies ...
【简答题】Translate the following passage into Chinese. Why do we send selfies? Do we genuinely think that’s the best way to let friends in on what’s going on in our lives and how we’re feeling when an emoji ju...