Will You Have Enough to Retire On?

Will You Have Enough to Retire On? By Andrew G. Biggs
The Retirement Security "Crisis"
AEI, Wednesday, February 11, 2009

Excerpts w/no references:

Americans are concerned about the state of preparedness for retirement, and many believe that retirement security is nearing a crisis. As life expectancies increase, traditional defined-benefit pensions decline, and Social Security faces significant reforms, many argue that a significant share of Americans will be at risk of an inadequate income in retirement. But despite these anxieties, most older Americans seem well prepared for retirement. Controlling for household composition, the Social Security replacement rate for typical workers born in 1940 was 63 percent of average preretirement earnings, and the median total pension replacement rate was 92 percent of prior earnings--well over financial planners' recommended rate of around 75 percent. Even among the younger 1960 birth cohort, for whom the projected median Social Security replacement rate declines to 54 percent, the median total pension replacement rate remains at 82 percent. While policymakers should work to strengthen Social Security and private pension savings, talk of a crisis in retirement income preparedness appears premature.

Policymakers and the general public are increasingly concerned that a significant share of Americans are at risk of having insufficient retirement income. A common rule of thumb for financial advisers is that retirees should have enough income to replace roughly three-quarters of their preretirement earnings. A survey of financial planners and educators recommended mean and median replacement rates of 74 and 75 percent, respectively.[1] This Retirement Policy Outlook will accept these recommendations as at least approximately correct.

In this Outlook, I use a microsimulation model of Social Security and private pension benefits to analyze the level and distribution of combined pension benefits for retirees in the 1940 and 1960 birth cohorts as of age seventy. I use two integrated microsimulation models--GEMINI, which simulates Social Security taxes and benefits, and PENSIM, which simulates defined-contribution and defined-benefit pension benefits--to calculate replacement rates for retiree households in the 1940 and 1960 birth cohorts. I then adjust replacement rates for differences in household composition. Replacement rates have come under criticism for being a relatively crude tool for retirement planning,[2] but they can be refined by adjusting them for the presence of children and for economies of scale in household size.[3]

The life-cycle model of consumption implies that individuals will use borrowing and saving to smooth consumption over time, seeking to consume roughly the same amount in working years as in retirement. However, without accounting for the costs incurred in raising children and efficiencies achieved in household size, traditional replacement rates may give misleading readings of preparedness for retirement. Children can consume a significant portion of a household's income, leaving less to be consumed by their parents. Although children are often an economic burden during their parents' working years, the lower preretirement consumption by parents implies that a lower level of retirement income is needed to match that preretirement consumption. As John Karl Scholz and Ananth Seshadri of the University of Wisconsin- Madison argue, "financial planning rules of thumb, and specifically replacement rates, ignore the role that children play in optimal life-cycle wealth decisions."[4] Adjusting for the presence of children will generally increase replacement rates for households with children, although it can reduce replacement rates for individuals who continue to support children while in retirement.

Economies of scale in household size imply that households with more than one member have lower relative costs of living than single-member households. Spouses (and children) sharing housing, food, transportation, and other costs can reap significant savings versus individuals living alone. Economies of scale in household size exist during working years as well as in retirement, so the net effect on measured replacement rates of adjusting for economies of scale depends upon individual circumstances.

Shared Earnings and Retirement Income

Following standard practice in Social Security analysis, income during working years and retirement is calculated on a "shared basis." Shared income is designed to account for two factors: first, that spouses tend to share income and costs equally, and second, that household composition changes over time due to marriage, divorce, birth, death, and so on.

The shared approach divides income equally between spouses in any year in which a spouse was present. Consider a household in which the husband earns $50,000 per year while the wife earns $20,000. Under the shared approach, their total household earnings of $70,000 would be divided by two, giving each spouse a "shared" income of $35,000 for that year. Likewise, a couple's Social Security benefits and pension income are deemed to be shared between them.

Replacement rates are calculated by dividing an individual's shared Social Security benefit or combined Social Security and pension benefit as of age seventy by average preretirement earnings.[5] Age seventy is chosen because, by this time, almost all individuals have claimed Social Security benefits and most have exited the paid workforce.

Some have argued that replacement rates should be adjusted for increases in Medicare premiums (which are automatically deducted from Social Security benefits) and for out-of-pocket health care costs.[6] Doing so would reduce measured replacement rates. However, this concern seems misplaced. If health care provides a value at the margin equal to its cost, such that individuals would rather spend their income on health care than on other goods or services, then there seems little reason to treat health care provision differently from other items in a household budget.[7]

Accounting for Household Size and Composition

The method used here extends the shared earnings approach described above by adjusting earnings and pension income for the presence of children and for economies of scale in household size. In doing so, it constitutes an improvement over previous analyses using other models that do not include the presence of children.[8]

In most previous analyses of retirement income, children would be effectively ignored. Total household income would simply be divided by the number of adults living in the household to calculate each individual adult's share. Yet, we know that children consume resources during an individual's working years, and we also know that a household consisting of multiple adults will have lower costs of living than had those adults lived separately. I use a formula devised in a National Academy of Sciences (NAS) project to measure poverty.[9] This formula calculates the number of "adult equivalents" living in a household. In my approach, shared income is adjusted for the presence of children and economies of scale in household size by dividing total household income by the household's number of adult equivalents.

The first issue to consider is how the presence of children affects their parents' need to save for retirement. Dartmouth economist Jonathan S. Skinner describes the effect of children on retirement income needs in simple terms:

Parents are already used to getting by on peanut butter, given that a large fraction of their pre-retirement budget has been devoted to supporting children, so it's not difficult to set aside enough money to keep them in peanut butter through retirement. By contrast, childless households with the same income accustomed to caviar and fine wine must set aside more assets to maintain themselves in the style to which they have become accustomed.[10]

That is to say, the costs of raising children imply that the consumption of goods and services by the parents will be significantly lower than in a childless household with similar income. While parents have lower standards of living than nonparents at similar earnings levels during their working lives, this also sets a lower bar that their retirement savings must meet. Replacement rate measures should account for these differences.

The second issue I consider is how economies of scale in household composition during working years and in retirement affect the income level required in retirement. Two can generally live more cheaply than one; a couple has a lower cost of living than two singles. Moreover, a child generally consumes less than an adult, so adding a child to a household does not necessarily imply a proportionate increase in costs of living.[11]

Household equivalence scales are designed to account for how differences in the size and composition of households affect a household's true cost of living. The adult equivalence scale from the NAS has been widely used.[12] It takes the form

Adult equivalents = (A + PK)F

where A is the number of adults in the family, K is the number of children, P is the cost of a child relative to an adult, and F is a factor reflecting economies of scale in household size. Lower values of P will result in relatively lower costs of living for a child versus an adult household member, while lower values of F will result in larger economies of scale as household size increases.

The NAS recommends a value for P of 0.7 and a value for F of between 0.65 and 0.75; I will use a value of 0.7 for both variables. A P value of 0.7 implies that a child costs 70 per-cent as much to support as an adult. The F value's interpretation is less intuitive, but it implies that as additional household members are added, the incremental cost of supporting each new additional household member declines.[13]

I adjust for household size by dividing the household's total earnings by the number of adult equivalents in the household. Assuming an economy of scale factor (F) value of 0.7, a household consisting of two adults would have only 1.6 adult equivalents. To illustrate, if total household earnings were $70,000, dividing by 1.6 would produce a shared earnings value for each spouse of $43,750. This value implies that their standard of living would be equivalent to that of a single individual earning $43,750. If the couple had two children, the adult equivalent factor would then be 2.4, and each adult's attributed share of total earnings would be $29,167. This value would reflect both that larger households use resources more efficiently and that a share of the household's total earnings flows to the children rather than the adults.

In each year, the number of adult equivalents in the household is calculated, and household income is divided by this figure to produce the shared income for that particular year. This adjusted shared income is used both for calculating pre-retirement earnings and Social Security and total pension income as of age seventy. Dividing the adjusted Social Security or total pension income by adjusted preretirement earnings produces a replacement rate adjusted for household composition.

Replacement Rates for the 1940 Cohort

In this section, I report projected replacement rates for members of the 1940 birth cohort as of age seventy. It is worth noting that these projections are not adjusted for recent economic conditions, which doubtless have affected the assets and incomes of many retirees. Retirees are in many ways less exposed to an economic downturn than working age individuals, as many have left the workforce and derive income from Social Security and defined-benefit pensions, meaning that higher unemployment and lower financial asset prices may have less effect. However, retirees also are far more dependent on asset income than working age individuals and have less time to allow asset values to recover. For these reasons, figures shown here should be taken to be generally representative of the retirement income adequacy of current new retirees, based on broad trends in Social Security and pension income.

Results of the simulation are first shown to illustrate the effects of the adult equivalent adjustment factor on replacement rates. [...]

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In fact, one could argue that many current retirees have oversaved. While of lesser concern than undersaving, there are large numbers of retirees with replacement rates significantly exceeding their preretirement earnings; 44 percent of individuals in the 1940 birth cohort have retirement incomes exceeding 100 percent of preretirement earnings, and 16 percent have replacement rates exceeding 150 percent. Although it is impossible to know how each individual would optimally choose to allot consumption between working years and retirement, these individuals may have inadvertently sacrificed consumption earlier in life to amass a retirement income significantly out of proportion to their needs or their ability to spend it enjoyably. These retirees may have been better served to save less during their working years, although surely many would not regret preparing for retirement as effectively as they did.

Replacement Rates for Future Retirees

While a strong majority of the 1940 birth cohort appears to have adequate retirement income to replace their preretirement earnings, many are concerned about how future retirees will fare. Social Security benefits will be lower, and private pensions will shift from defined-benefit schemes--which are perceived to be more generous--to defined-contribution plans.[18] To examine these questions, I analyze projected replacement rates for members of the 1960 birth cohort, who will retire in the 2020s.

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Conclusion

Accounting for differences in household composition can have a significant effect on judgments about the adequacy of retirement income. Adjusting for household size and the presence of children increases the typical replacement rate for the 1940 birth cohort by approximately fifteen percentage points, although measured replacement rates decline for roughly one in ten retirees.

For the 1940 birth cohort, overall retirement preparedness appears to be strong. The typical Social Security replacement rate adjusted for household composition is 63 percent of preretirement earnings, while the median total pension income replacement rate is 92 percent. This latter figure significantly exceeds financial advisers' recommended replacement rate of around 75 percent.

Projected replacement rates for the 1960 cohort are lower, with a median adjusted total pension replacement rate of 84 percent. But even this reduced level is adequate on average, and if individuals were to choose to remain in the workforce for just one more year, the median replacement rate would rise to around 89 percent.

The most significant gray area surrounding these projections is when and how the Social Security program will be reformed to improve its financial soundness. While the program is projected to be solvent until the 2040s--meaning that scheduled benefits should be payable as of the 2020s, when the 1960 cohort will retire--changes to taxes and benefits are likely to occur in the near future. These changes are likely to reduce average replacement rates, although they will probably shield low earners from the greatest changes. While it is important to reduce the growth of Social Security benefits to ease pressure on the federal budget, Social Security reform should also include provisions to increase individual retirement savings outside of Social Security so as to help maintain income replacement rates at retirement.

While policymakers should not ignore policies to help individuals build sufficient income for retirement, such as reforming Social Security and automatically enrolling employees in pension plans, neither should they panic or assume a crisis is at hand. Most Americans, both current retirees and future ones, appear to be reasonably well prepared to support themselves in retirement.

Andrew G. Biggs is a resident scholar at AEI.

AEI research assistant Adam Paul worked with Mr. Biggs to produce this Retirement Policy Outlook.