Why aren't some of these problems solved by property rights? The article shows case after case of nearby property owners having what seem to be clear cases of h

Why aren't some of these problems solved by property rights? The article shows case after case of nearby property owners having what seem to be clear cases of health problems and other property violations caused by the pigs. If there isn't a causal link that can be shown in court, then we don't know this is the problem.