LaTeX.org

Thanks, Stefan. It's working now.

I've read a thousand times the code and I can't find out what's wrong. It follows below:

A4:\textbf{Limit Dominance}: There exist $\underbar \theta \in \mathbb{R}$ and $\bar \theta \in \mathbb{R}$, such that (i) $\pi(l,x)<0$ for all $l \in [0,1]$ and $x \leq \underbar \theta$;(ii) $\pi(l,x)>0$ for ...