Most workers in defined contribution retirement plans are inattentive portfolio managers: only a few engage in any trading at all, and only a tiny minority trades actively. Using a rich new dataset on 1.2 million workers in over 1,500 plans, we find that most 401(k) plan participants are...

In an effort to improve 401(k) portfolio choices, many US plan sponsors are offering target maturity date (TM) lifecycle funds, which place younger workers into higher-equity-share portfolios and then automatically rebalance them into more conservative holdings as they near retirement age. Our...

Important behavioral factors such as default and framing effects are increasingly being employed to optimize decision-making in a variety of settings, including individually-directed retirement plans. Yet such approaches may have unintended "spillover" effects, as we show with regard to the...

Few previous studies have explored how individuals manage their defined contribution (DC) pension plan assets, even though such plans constitute an increasingly important component of retirement wealth. Using a unique new dataset on over one million active 401(k) plan participants in a wide...

Though millions of US workers have 401(k) plans, few studies evaluate participant investment performance. Using data on over 1,000 401(k) plans and their participants, we identify key portfolio investment inefficiencies and attribute them to offered investment menus versus individual portfolio...

To evaluate the extent of inefficient behavior in 401(k) pensions, now the dominant form of retirement saving in America, we attribute inefficiencies separately to the employer's menu design versus participant portfolio elections. Results from our analysis of over 1000 plans and a million...

Individual responsibility for portfolio construction is a central theme for defined contribution pensions, yet the rise of target-date funds is shifting investment decisions from workers back to employers. A complex choice architecture including automatic enrollment, reenrollment, and fund...