The weekend is a great time to catch up on some long-form links you missed during the week. We think this should also include our new book, Abnormal Returns: Winning Strategies from the Frontlines of the Investment Blogosphere. Enjoy.

Finance

The upside of the ETF price war.  (IndexUniverse)

Asness and Armott discuss factor models, growth vs. momentum and the usefulness of theory.  (Morningstar)

Six trends affecting the financial planning industry.  (Nerd’s Eye View)

What constitutes economic expertise?  (Euzozine via The Browser)

An excerpt from Michael J. Mauboussin’s The Success Equation: Untangling Skill and Luck in Business, Sports and Investing.  (Fast Company)

Technology

Ecosystems are the new walled gardens.  (Pando Daily)

Accelerators are no longer just for tech companies.  (Businessweek)

Science

Is a new theory of Alzheimer’s ready to push aside the amyloid hypothesis?  (WSJ)

Just how much can we learn from someone’s DNA?  (Not Exactly Rocket Science via The Browser)

Products

The secret history of the Aeron chair.  (Slate)

Comparing LED bulbs.  (Slate)

Quants

Getting it right is the best marketing of all: on the rise of Nate Silver.  (Bob Lefsetz)

Inside the secret world of Barack Obama’s number crunchers.  (Time)

How Khan Academy is reinventing education.  (Forbes)

Sports

The glorious plight of the Buffalo Bills.  (Grantland via @longreads)

How often does the “best” team win the World Series?  (Freakonomics)

Entertainment

How the band Nickelback makes gobs of money.  (Businessweek via Longform)

How Top Chef makes viewers want food you can’t touch or smell.  (Fast Company)

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