On the price of (my) higher education

With my higher education studies behind me, I wanted to reflect a bit on the different amount of tuition fees that I experienced moving around European universities. Stage 1: France I started in 2008 with a Bachelor of science in Strasbourg, at that time you had to pay around 500€ for a year. In these …

Adding standard errors for interaction terms

This is something that bugged me for some time, how do we add up standard errors? This is relevant when you fit a model with interaction terms and you are interested not only in the deviation between different categories in your data (like male, female juvenils) but also whether the effect of some covariates on …

Simulating SEMs for piecewiseSEM: part 1 the basics

Structural Equation Models are being used more and more frequently by ecologists due to the appeal of linking variables together in complex web of interactions. There are currently two main libraries in R to fit such models: lavaan and piecewiseSEM. The aim of this post is not to discuss the advantages and drawbacks of these …