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Anderson, Kermyt G., Hillard Kaplan, and Jane B. Lancaster. 2001. "Men's Financial Expenditures on Genetic Children and Stepchildren from Current and Former Relationships." PSC Research Report No. 01-484. September 2001.
This article investigates differential investment by men in their genetic children and stepchildren from current and former unions, using a sample of 635 children ages 0-24 drawn from the Albuquerque Men Study. We also examine selection effects by restricting the sample to men with children in more than one category, e.g., men with both genetic children and stepchildren in current unions, etc. Selection effects are important; men with both genetic offspring and stepoffspring in current relationships invest similarly in children, but the differences between offspring from current and previous unions are greater when comparing men with children in both categories. These results are consistent with the biosocial model advanced in the paper.