The following video discusses the four types of markets: perfect competition, monopolistic competition, oligopoly, and monopoly. Given the market structures as described in the video, identify at least two articles from the Pro Quest database that highlight and discuss two of the biggest challenges facing financial managers today in these varied market structures. In a three- to five-page paper (excluding title and reference pages), summarize your findings from the articles. Include how market liquidity, competitiveness, and efficiency impact financial managers. The paper should be formatted according to APA style. Be sure to properly cite your two required articles resources using APA style.