Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...

Discover what a concentration ratio reveals about industry dominance, competition levels, and firm sizes. Learn to calculate ...

As a small-business owner, you're probably an avid reader of financial and economic news. And like many of your colleagues, you probably scratch your head over some of the headlines you read about ...

Three firms dominate the target date fund market, constituting an oligopoly. One firm – Vanguard – owns 72% of the passive TDF market, constituting a monopoly. Oligopolies and monopolies are bad. They ...