I’ve written about this many times, the most recent time here: <https://meyersmoney.wordpress.com/2012/11/29/delaying-the-start-of-social-security/>
Wade Pfau, however, one of the foremost experts on retirement and getting one’s investments to last through retirement – has written a great column in Forbes about the issue: <http://www.forbes.com/sites/wadepfau/2014/04/01/delaying-social-security-what-an-investment/?ss=personalfinance>
I couldn’t have said it better myself.