RMA Research Methods & Evidence-Based Practice 3 — Questions and Answers
Question 1: The 'safe withdrawal rate' research pioneered by Bengen (1994) was based primarily on:
- Monte Carlo simulation with forward-looking capital market assumptions
- Historical U.S. stock and bond return data using rolling 30-year periods (Correct answer)
- Annuity pricing data from insurance companies
- Global diversified portfolio returns from 1900 to present
Correct answer: Historical U.S. stock and bond return data using rolling 30-year periods
Bengen's foundational 4% rule research analyzed historical U.S. stock and bond returns using overlapping 30-year rolling periods.
Question 2: When applying evidence-based practice, confirmation bias in retirement planning research occurs when an adviser:
- Uses multiple data sources to validate a recommendation
- Seeks out studies that contradict the preferred strategy
- Selectively emphasizes research supporting a pre-existing conclusion while ignoring contrary evidence (Correct answer)
- Presents clients with balanced pros and cons
Correct answer: Selectively emphasizes research supporting a pre-existing conclusion while ignoring contrary evidence
Confirmation bias leads practitioners to favor information that confirms their existing beliefs while discounting contradicting evidence.
Question 3: A meta-analysis of retirement spending studies is most valuable because it:
- Provides a single case study with detailed qualitative data
- Pools results from multiple studies to increase statistical power and generalizability (Correct answer)
- Replaces the need for any individual primary research
- Focuses exclusively on anecdotal evidence from retirees
Correct answer: Pools results from multiple studies to increase statistical power and generalizability
Meta-analyses combine data across multiple studies, increasing sample size, statistical power, and the reliability of conclusions.
Question 4: In the context of retirement research, 'internal validity' refers to:
- Whether results can be generalized to a broader population
- The degree to which a study accurately measures what it intends to measure and supports causal conclusions (Correct answer)
- Whether the research was published in a reputable journal
- The consistency of results when the study is repeated
Correct answer: The degree to which a study accurately measures what it intends to measure and supports causal conclusions
Internal validity is the degree to which a study's design supports causal inference and accurately captures the relationship under study.
Question 5: Which statistical measure is most appropriate for comparing variability in annual returns across two retirement portfolios with different mean returns?
- Standard deviation
- Coefficient of variation (Correct answer)
- Arithmetic mean
- Geometric mean
Correct answer: Coefficient of variation
The coefficient of variation (standard deviation divided by mean) normalizes dispersion, allowing valid comparison of variability across datasets with different means.
Question 6: Research consistently shows that sequence-of-returns risk is most damaging during which phase of retirement planning?
- The accumulation phase when contributions are at their peak
- The early distribution phase when the portfolio balance is highest and withdrawals begin (Correct answer)
- The late distribution phase when the portfolio is nearly depleted
- The rebalancing phase regardless of timing
Correct answer: The early distribution phase when the portfolio balance is highest and withdrawals begin
Early retirement losses are most harmful because they reduce the asset base that would otherwise compound, and withdrawals lock in those losses.
Question 7: An adviser evaluating a financial product study notes it was funded by the product manufacturer. The most appropriate response is to:
- Automatically reject the study as invalid
- Accept the findings at face value since it was peer-reviewed
- Apply greater scrutiny to methodology and seek independent corroborating research (Correct answer)
- Report the manufacturer to regulators
Correct answer: Apply greater scrutiny to methodology and seek independent corroborating research
Industry-funded research carries potential conflicts of interest, requiring heightened methodological scrutiny and corroboration from independent sources.
RMA Research Methods & Evidence-Based Practice 3
The 'safe withdrawal rate' research pioneered by Bengen (1994) was based primarily on: