Farming equipment has become vastly more complicated than it was in the past. This is great because these amazing machines are much more capable, but they also require specialized tools and diagnostic equipment to keep them running. Most farmers are quite skilled mechanics and would like to be able to purchase these tools in order to do their own maintenance. Many manufacturers, though, refuse to sell these things to the farmers, requiring instead that the farmer pay for a factory trained mechanic to do the work.

Why is this the case? Using price discrimination explain why the manufacturers refuse to sell these things to the farmers, requiring instead that the farmer pay for a factory trained mechanic to do the work.