NHESG 2018, Tromsø: Presentation of two papers “Live longer, work longer? Evaluating the health capacity to work at older ages in Denmark. A panel data study of Danish men and women aged 50+ using the Survey of Health, Ageing and Retirement in Europe.” (with Maiken Skovrider Aaskoven) and “How far does the peer effect on smoking behavior reach”; discussion of paper “Estimating fixed effects: Perfect prediction and bias in binary response panel models, with an application to the Hospital Readmissions Reduction Program” by Kevin Staub.