But it was Henry Ford's tax-avoidance strategy two decades earlier that first established the dual-class structure.

FORBES: Magazine Article

Ford declined to comment, but referred to a previously issued statement in response to a shareholder proposal to eliminate the dual-class structure.

FORBES: Ford Family's Stake Is Smaller, But They're Richer And Still Firmly In Control

However, day-to-day dilution from routine equity-based employee compensation and other possible dilution, such as stock-based acquisitions, will likely undermine this dual-class structure and our aspirations for Google over the very long term.

FORBES: Google's Paranoid Governance Structure Has Made It Less Innovative, Not More

As my colleague Eric Savitz notes, Workday has a dual-class stock structure.

FORBES: Workday Boosts IPO Price Range To $24 To $26

The dual-class share structure at News Corp gives a strong power base to Rupert Murdoch and his close allies.

BBC: News Corp asked to reform board by investors

's dual-class share structure, which allows CEO Murdoch to control the company through the 40 percent of voting shares he controls through a family trust.

WSJ: News Corp. insurers pay $139M in shareholder suit

The family answers to no one, running the company as if it were private, thanks to a dual-class stock structure that was set up when the company went public in 1969.

FORBES: Bargain Bin

The company is out raising money again, and Mr. Goldberg said his investors, including Andreessen Horowitz, support creating a new dual-class voting structure that gives him control after the round closes as long as he stays CEO.

WSJ: In Silicon Valley, Founders Fight for Control

Workday has a dual-class stock structure.

FORBES: Workday Prices IPO At $28 Per Share In $637 Million Deal