1. Consequences of Assortative Mating and Fertility Differentials for the Obesity Pandemic • Sebastian F. Daza , University of Wisconsin-Madison; Alberto Palloni, University of Wisconsin-Madison; J. Sebastian Ruiz-Santacruz , Spatial National Research Council - Center for Human and Social Sciences.

2. The effect of friends on smoking and drinking behaviour. An identification strategy based on indirect friends. • Emanuele Fedeli , University of Trento; Moris Triventi, University of Trento.

3. The Contribution of Health Behaviors to Depression Risk across Birth Cohorts • Maria Gültzow , Max Planck Institute for Demographic Research; Maarten J. Bijlsma, 2. Unit PharmacoEpidemiology & PharmacoEconomics (PE2), Department of Pharmacy, University of Groningen, the Netherlands; Frank Van Lenthe, Erasmus Medical Centre, Rotterdam; Mikko Myrskyla, Max Planck Institute for Demographic Research.

4. The Effect of the Covid Lockdown on Alcohol Consumption in the Netherlands. The Role of Social Isolation and Household Type. • Lluís Mangot-Sala , Netherlands Interdisciplinary Demographic Institute; Nynke Smidt, University Medical Center Groningen; Aart C. Liefbroer , Netherlands Interdisciplinary Demographic Institute (NIDI).

5. Evaluating social and gender differences in excess weight in the Iberian Peninsula: a multilevel analysis in urban settings • Natalia Tumas , Pompeu Fabra University; Juan Manuel Pericàs, GREDS-EMCONET; Eliana Martínez Herrera, GREDS-EMCONET, UPF; Francesc Belvis Costes, GREDS-EMCONET, UPF; Mariana Gutiérrez-Zamora Navarro, GREDS-EMCONET, UPF; Cristina Miquel, GREDS-EMCONET, UPF; Joan Benach, Pompeu Fabra University.