How to pick a mutual fund without getting ripped off by Timothy B. Lee, Vox,February 6, 2015. [Detailed and helpful guide.]
Ten Investing Facts of Life By Noah Smith, BloombergView.com, December 26, 2014. [Index funds, index funds, index funds. Buy and hold, buy and hold, buy and hold.]
How Our Taxi Article Happened to Undercut the Efficient Market Hypothesis By Josh Barro, The Upshot (blog), The New York Times, December 3, 2014. 
The Top 10 Myths About Social Security by MONIQUE MORRISSEY, Working Economics (blog), Economic Policy Institute, August 13, 2014. 
Budging (Just a Little) on Investing in Gold By N. GREGORY MANKIW, The New York Times, Published: July 27, 2013. [As a long-term investment, gold has offered small overall returns with high volatility. But there is still an argument for keeping a sliver of it in a portfolio.]
What Stock to Buy? Hey, Mom, Donít Ask Me By N. GREGORY MANKIW, The New York Times, Published: May 18, 2013. [Economists have studied the stock market extensively, but that does not necessarily make them good stock pickers.]
Machine Over Man: Stock Pickers' Woes By IAN MCDONALD, The Wall Street Journal, November 6, 2006.
Buy and Hold? Sure, but Don't Forget the 'Hold' By MARK HULBERT, The New York Times, July 2, 2006.
Turn on a Paradigm? By JOHN C. BOGLE and BURTON G. MALKIEL, The Wall Street Journal, June 27, 2006.
The 'Noisy Market' Hypothesis By JEREMY J. SIEGEL, The Wall Street Journal, June 14, 2006.
GREEN THUMB: Finding an Index-Fund Genius: How Specialist Investment Advisers Can Improve Your Portfolio By RON LIEBER, The Wall Street Journal, February 25, 2006.
The Great Race: ETFs vs. Funds: New Opportunities for Indexing Complicate Investors' Choices; Picking the Right Market 'Slice' By ELEANOR LAISE, THE WALL STREET JOURNAL, November 5, 2005.