I am a clear example of how sole proprietorship can exist in monopolistic competition. See here I have my own bakery. My shop is called Shake and Bake, but there are many competitors across the nation.
I own a small farm, and I frequently go to the local farmers market to sell my produce. Over at the farmers market, there are many other people who sell the same goods I do. So this is an example of sole proprietorship and perfect competition.
We share a massive airplane company. There are very few competitors in this oligopoly.
yeah, what she said.
I own my own bakery, so I always have to compete with Shake and Bake.