Martin Kolk

Martin Kolk

Researcher, Docent

Visa sidan på svenska
Works at Department of Sociology
Visiting address Universitetsvägen 10 B, plan 9
Room B 879
Postal address Sociologiska institutionen, Demografiska avdelningen 106 91 Stockholm

About me

I am a researcher and Docent (Associate Professor) at SUDA (Stockholm University Demography Unit), CEK (Centre for Cultural Evolution), and IF (Institute for Future Studies), working on various aspects of intergenerational demography and cultural evolution. My main topic is the demography of kinship in contemporary and historical populations. Currently, I use linked register and parish data with micro-level data to examine demographic change from the mid 18th century until today. I am also working with researchers at the program for historical demography at Academica Sinicia in Taipei, Taiwan.

My research interests are often related to intergenerational demographic processes, but I have written papers on many areas of demography, including fertility, mortality, migration, same-sex demography, household composition, and union formation. I am also interested in cultural evolution, and in particular relationship between cultural evolution and demographic parameters.

Recent studies include; kinship and stratification, long-term consequences of intergenerational transmission of fertility, age differences in unions, cohort approaches to migration, and influences of family composition in childhood on various demographic outcomes. 

My Google Scholar page is available here and my CV can be found to the right.

Most of my publications are available for everyone to download using this link.


Recent Publications:

Kolk, Martin (2019) “Period and Cohort Measures of Internal Migration” Population, conditionally accepted

Barclay, Kieron and Martin Kolk (2019) “Parity and Mortality: An Examination of Different Explanatory Mechanisms Using Data on Biological and Adoptive Parents” European Journal of Population, Available online

Kolk, Martin (2019) “Weak support for a U-shaped pattern between societal gender equality and fertility when comparing societies across time” Demographic Research40: 27-48

Kridahl, Linda and Martin Kolk (2018) “Retirement coordination in opposite-sex and same-sex married couples: Evidence from Swedish registers” Advances in Life Course Research38: 22-36

Dahlberg, Johan and Martin Kolk (2018) “Explaining Swedish Sibling Similarity in Fertility – Parental Fertility Behavior vs. Social Background” Demographic Research39: 884-893

Barclay, Kieron and Martin Kolk (2018) “Birth Intervals and Health in Adulthood: A Comparison of Siblings using Swedish Register Data” Demography, 55(3): 929–955

Kolk, Martin and Martin Hällsten (2017) “Demographic and educational success of lineages in northern Sweden” Population and Development Review43(3): 491–51

Barclay, Kieron and Martin Kolk (2017) “The long-term cognitive and socioeconomic consequences of birth intervals: a within-family sibling comparison using Swedish register data” Demography54(2): 459-484

Kolk, Martin (2017) “A life course analysis of geographical distance to siblings, parents and grandparents in Sweden” Population, Space and Place, 23(3): e2020

Baranowska-Rataj, Anna, Kieron Barclay and Martin Kolk (2017) ”The effect of the number of siblings on adult mortality: Evidence from Swedish registers” Population Studies, 68(1): 111-129

Chudnovskaya, Margarita, & Kolk, Martin (2017) “Educational expansion and intergenerational proximity in Sweden” Population, Space and Place, 23(1): e1973

Barclay, Kieron, Katherine Keenan, Emily Grundy, Martin Kolk and Mikko Myrskylä (2016). “Reproductive history and post-reproductive mortality: A sibling comparison analysis using Swedish register data” Social Science & Medicine, 155: 82-92

Kolk, Martin and Sebastian Schnettler (2016) “Socioeconomic status and sex ratios at birth in Sweden. No evidence for a Trivers-Willard effect for a wide range of status indicators” American Journal of Human Biology28(1): 67-73

Andersson, Gunnar and Martin Kolk (2015) ”Trends in childbearing, marriage and divorce in Sweden: An update with data up to 2012” Finnish Yearbook of Population Research50: 21-30

Kolk, Martin (2015) “Age differences in unions: Continuity and divergence in Sweden between 1932 and 2007” European Journal of Population, 31(4): 365-382

Kolk, Martin (2015) “The causal effect of an additional sibling on completed fertility – An estimation of intergenerational fertility correlations by looking at siblings of twins” Demographic Research 32: 1409-1420

Barclay, Kieron and Martin Kolk (2015) “Birth order and mortality: A population based cohort study” Demography, 52(2): 613-639

Kolk, Martin, Daniel Cownden and Magnus Enquist (2014) “Correlations in fertility across generations – can low fertility persist” Proceedings of the Royal Society B, 281(1779): 20132561

Kolk, Martin (2014) “Understanding transmission of fertility across multiple generations – Socialization or socioeconomics?” Research in Social Stratification and Mobility, 35:89-103

Kolk, Martin (2014) “Multigenerational transmission of family size in contemporary Sweden” Population Studies, 68(1): 111-129


Recent working papers:


Barclay, Kieron, Anna Baranowska-Rataj, Martin Kolk, and Anneli Ivarsson “Interpregnancy Intervals and Perinatal and Child Health in Sweden: A Comparison Within Families and Across Social Groups” MPIDR Working Paper, WP 2018-004

Molitoris Joseph, Kieron Barclay, and Martin Kolk “When Birth Spacing Does and Does Not Matter for Child Survival: An International Comparison using the DHS” Stockholm Research Reports in Demography 2018:21

Kolk, Martin and Gunnar Andersson (2018) “Two Decades of Same-sex Marriage in Sweden. A Demographic Account of Developments in Marriage, Childbearing and Divorce” Stockholm Research Reports in Demography 2018:9.

Kolk, Martin and Kieron Barclay (2017) “Cognitive ability and fertility amongst Swedish men. Evidence from 18 cohorts of military conscription” Stockholm Research Reports in Demography 2017:34.

Morosow, Kathrin and Martin Kolk (2016) “How does Birth Order and Number of Siblings Effect Fertility? A Within-Family Comparison using Swedish Register Data” Stockholm Research Reports in Demography 2016:7.

Kolk, Martin (2016) “Period and Cohort Measures of Migration” Stockholm Research Reports in Demography 2016:5.


Doctoral thesis:

Kolk, Martin (2014) Multigenerational processes in demography. Stockholm University: Stockholm.

Last updated: January 18, 2019

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