Multiple Linear Regression with Antecedents

Sounds fascinating. I'd love to read the thesis.

However, from an R point of view I think we need to see what you are doing in the code and what the data coding looks like. We have no idea of what you are doing with antecedents. For example are you treating them by media or by theme. Perhaps by language? All of the above?

Have a look at

and

and see if they help in expanding on your question.