Market Structures and returns

Due by 1800 EST on 11 November 2018, tomorrow.  No extensions.  

250 word forum post.  Not an essay.  

In the hope of high returns, venture capitalists provide funds to finance new (start up) companies. However, potential competitors and structures of the market into which the new firm enters are extremely important in realization of profits. Among different market structures, which one do you believe provides the highest possible return for a new company and why?

Plus a separate 75 word post with more information on the same idea to add to another student post.