Can be due to different building structures and different buildings or places were different religions are held.
Answer:
A market for cats would have had a positive externality.
Because the cats would kill the rats on sight since that is their natural behavior.
However, it is interesting to mention, that the cat's killing has been more of a "mythic" aspect of this story, since it fails to take into account that since the black death was caused by the<em> yersinia pestis</em> bacteria, cats could have been also infected, and since their interactions with humans are greater than rats or fleas, the real outcome could have been totally unexpected.
Answer: Vanqueros have been driving and herding Wild Horses and cattle for many years by the time they were part of the Texas ranching landscape,. They've also had a heavy influence on American cowboys and their Clothing.