Given the market structures; perfect competition, monopolistic competition, oligopoly, and monopoly.

Discuss two of the biggest challenges facing financial managers today in these varied market structures.  Summarize  in a three to five page paper excluding title page and references page(s).  Include how market liquidity, competitiveness, and efficiency impact financial managers.   The paper should be formatted according to APA style as outlined in the Ashford Writing Center. Be sure to properly cite your resources using APA style