Publications
Regarding Cohort Variations in Experiences and Well-Being
�Generational Variations
in Wellbeing: Suicide Rates, Cohort Characteristics, and National
Socio-Political Context over Seven Decades,� Social Forces, 2025,
104:341-365. Online first February 3, 2025. https://doi.org/10.1093/sf/soaf019.
�Race Differences in Cohort Effects on Nonmarital Fertility
in the United States: Reply to Martin,�
�Race Differences in Cohort Effects on Nonmarital Fertility
in the United States,�
�Can Cohort Replacement Explain Changes in the Relationship
between Age and Homicide Offending?� Robert M. O�Brien and
�A Mixed Model Estimation of Age, Period, and Cohort
Effects� Robert M. O�Brien, Kenneth Hudson, and
�A Common Explanation for
the Changing Age Distributions of Suicide and Homicide in the United States:
1930-2000,� Robert M. O�Brien and
�Cohort Variations in
Suicide Rates Among Families of Nations: An Analysis of Cohorts Born from
1875 through 1985,�
�The Cohort-Size,
Sample-Size Conundrum: An Empirical Analysis and Assessment Using Homicide
Arrest Data from 1960 to 1999,� Robert M. O�Brien and
�Cohort Effects on Suicide Rates: International Variations.�
�Cohort Variations and
Changes in Age-Specific Suicide Rates Over-Time: Explaining Variations in Youth
Suicide.�
�Variations in
Age-Specific Homicide Death Rates: A Cohort Explanation for Changes in the Age
Distribution of Homicide Deaths.� Robert M. O�Brien and
�The Enduring Effects of Cohort Size and Percentage of Nonmarital
Births on Age-Specific Homicide Rates, 1960-1995.� Robert M. O�Brien,