Cited by 3,582Statistical Methods and Bayesian InferenceSurvey Sampling and Estimation TechniquesSpatial and Panel Data Analysis

The DOI matches its Crossref record; 20 of the 21 references it cites were found in a registry or an index.

Sufficient Sample Sizes for Multilevel Modeling

Maas, Cora J. M., Hox, Joop J.·2005·Methodology

Abstract

Abstract. An important problem in multilevel modeling is what constitutes a sufficient sample size for accurate estimation. In multilevel analysis, the major restriction is often the higher-level sample size. In this paper, a simulation study is used to determine the influence of different sample sizes at the group level on the accuracy of the estimates (regression coefficients and variances) and their standard errors. In addition, the influence of other factors, such as the lowest-level sample size and different variance distributions between the levels (different intraclass correlations), is examined. The results show that only a small sample size at level two (meaning a sample of 50 or less) leads to biased estimates of the second-level standard errors. In all of the other simulated conditions the estimates of the regression coefficients, the variance components, and the standard errors are unbiased and accurate.

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Crossref · 10.1027/1614-2241.1.3.86

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Metadata

Authors
Maas, C. J. M., & Hox, J. J.
Affiliations
Utrecht University (NL)
Venue
Methodology
Published
2005-01
Volume
1
Issue
3
Pages
86-92
ISSN
  • 1614-1881 (ISSN-L)
  • 1614-2241
OpenAlex
W2112146495
Cited by
3,582
References
21
Citations by year
2026: 292 · 2025: 282 · 2024: 190 · 2023: 220 · 2022: 241 · 2021: 289 · 2020: 293 · 2019: 258 · 2018: 268 · 2017: 248 · 2016: 201 · 2015: 196 · 2014: 157 · 2013: 130 · 2012: 105
FWCI
15.22
Type
journal article
Language
en
Open access
closed
Locations
Methodology (publishedVersion)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Bayesian Inference
  • Physical Sciences › Mathematics › Statistics and Probability › Survey Sampling and Estimation Techniques
  • Social Sciences › Economics, Econometrics and Finance › Economics and Econometrics › Spatial and Panel Data Analysis
Keywords
sample size, multilevel modeling, variance components, intraclass correlation coefficient, estimation bias, regression coefficients, simulation study

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