Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

Retail market structure refers to the number of companies that sell similar or identical products in the same geographical area. An oligopoly describes a small group of companies that collude to raise ...

Businesses don't operate in a bubble -- their sales and profitability are affected by the business environment in which they operate. Many factors affect this environment, from regulation and ...