But regulators investigating the causes have yet to identify a clear cause.

FORBES: SEC Sets 6-Month Test of Stock Circuit Breakers

My years of experience investigating the causes of investment underperformance has led me to conclude that the marketplace is, in fact, dominated by investments that, to varying degrees, are severely comprised and destined to underperform.

FORBES: Develop a "Fiduciary Response" or You Will Get Scammed

The NTSB and the FBI are investigating three possible causes of the July 17 crash that killed all 230 people aboard the plane.

CNN: Attorney: Mechanical failure caused TWA crash

Solution search includes investigating industry best practices, understanding root causes of the problem, and collaborating with peers and colleagues.

FORBES: Influencing Your Buyer

Sir Richard Peto, the renowned British statistician who conducted an analysis showing "no credible evidence" that the cholesterol medicine Vytorin causes cancer, defended himself in a sharply worded letter to congressmen investigating the medicine.

FORBES: Magazine Article