Callan’s 2017 Defined Contribution Trends  This survey shows the features offered by 401(k) plans, including target-date funds and managed accounts.

Morningstar’s evaluation of target-date funds vs. managed accounts  This 2017 study compares the costs and benefits of TDFs vs. managed accounts.

GAO Study on Managed Accounts  This 2014 Government Accountability Office study recommends ways managed accounts can better serve investors.

IRA Calculator  This Morningstar tool can show you which type of IRA you qualify for and help you decide which is best. (Requires free registration.)

Investment Returns: Defined Benefit Vs. Defined Contribution Plans  This Boston College Center for Retirement Research study compares the returns of pension plans vs. 401(k)-type defined contribution plans.

Contribution Limits for IRAs and 401(k)s  This IRS release details the maximum allowable annual contributions for 2015 and 2016 for traditional and Roth IRAs, 401(k)s, 403(b)s and 457 plans and spells out the income eligibility criteria for traditional and Roth IRA accounts.

Fairmark.com  Virtually anything you want to know about Roth IRAs and Roth 401(k)s, you can  find on this comprehensive site.

Should You Convert Your IRA to a Roth IRA?  This tool will show you how much tax you’ll owe by converting a portion of your traditional IRA to a Roth and help you assess whether such a conversion makes sense.

Required Minimum Distributions  For details on when and how much you’re required to withdraw from IRA and 401(k) accounts, check out IRS Publication 590-B and these worksheets. This table compares the distribution rules for IRAs vs. 401(k)s and other defined contribution plans.