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Raising a Child Alone: What the Research Shows, and What It Misses

By Leon MoriguchiPublished May 13, 2026Updated May 18, 20266 min read日本語版あり
Audience
Single parents; people who support single-parent families

TL;DR

  • ·McLanahan and Sandefur's foundational research identified the real mechanism: outcomes associated with single parenthood are driven by deficits in economic resources, parental time, and residential stability — not family structure itself — which means addressing those conditions substantially reduces the risk
  • ·A stable single-parent home consistently outperforms a high-conflict two-parent home on developmental measures; the binary of "two parents good, one parent bad" is not what the data support
  • ·Japan's single-parent poverty rate stands at 44.5% — that figure is not background noise but the primary channel through which developmental risk operates, and it makes social policy the most powerful lever available

Contents

  1. Lead
  2. How Many Families Are We Talking About?
  3. McLanahan & Sandefur: The Foundational Work
  4. Amato's Review: A "Modest" Effect
  5. The Income Variable
  6. What Stability Offers
  7. Keeping Records When You Are the Only One There
  8. Summary
  9. References

Lead

Growing up in a single-parent home. Raising a child on your own. These facts attract a particular kind of social framing: sympathy ("how hard for you"), prejudice ("that explains the problems"), or the compensatory compliment ("you did it despite everything"). Each of those responses arrives before the individual reality of any parent or child. Each is a label applied in advance.

The research on single-parent families has accumulated considerably over the past three decades. It is not simple. It does not support the story that single-parent status causes poor outcomes in any direct way, but it does not support dismissing the association either. This article tries to represent both what the studies show and what they tend to leave out.

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