Abstract
Recent studies have found that adoptive parents invest in their children equally or more than biological parents do. Most of these studies observed relationships across families, comparing families with adopted children to those without. In this study, alternatively, we focused on within-family comparisons to more fully isolate the relationship between biological ties and parental investments. Using American Time Use Survey (2007–2018; n = 1,152 children) and American Community Survey (2014–2018; n = 34,673 children) data, we employed within-family fixed effects regression models and focused on both parental time and financial investments, using private school enrollment as a proxy for the latter. Our findings show that parents spent less one-on-one, quality, and total time daily with adopted children compared to biological children. In terms of financial investments, 90% of children in the sample received equal investments, meaning that either all or no siblings within the same family were enrolled in private school. However, among families with enrollment differences between siblings, adopted children were significantly less likely than their non-adopted siblings to be enrolled in private school. These findings show that adopted children within mixed-adoption families may receive equal or fewer investments than their non-adopted siblings. The findings highlight the possibility of selection as an interpretation of the adoptive-child advantage, illustrate the importance of within-family studies on this topic, and point to the complexity of parental investments in adopted children.
Highlights
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Adopted children in mixed-adoption families experienced fewer parental time investments than their non-adopted siblings.
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Most (90% of) children in mixed-adoption families experienced equality among siblings in private school enrollment.
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When differences occurred, adopted children were less often enrolled in private school than their non-adopted siblings.
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Selection may explain the adoptive-child advantage in parental investments.
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Findings also suggest that mixed-adoption families are unique and should be the focus of future studies.
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All authors contributed to the study conception and design. Data cleaning was performed by all authors and analysis was performed by A.L.G. and J.S.W. The first draft of the manuscript was written by Ashley Larsen Gibby and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Our study used publicly available secondary data from the U.S. Census Bureau. We used the American Community Survey, which is required by law for participants to complete.
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Gibby, A.L., Wikle, J.S. & Thomas, K.J.A. Adoption Status and Parental Investments: A Within-sibling Approach. J Child Fam Stud 30, 1776–1790 (2021). https://doi.org/10.1007/s10826-021-01975-7
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DOI: https://doi.org/10.1007/s10826-021-01975-7