Directly from the start of the master you choose one of these tracks. Each track contains several specializations, as well as an “open specialization”, with a more broader focus on either econometrics or operations research.
The track Econometrics focuses on developments in theory, methodology and application of econometric and statistical methods for the analysis of financial, marketing, economic, climate data, nowadays often Big Data. Econometrics connects to many academic disciplines including mathematics, statistics, computer science, economics, finance, and business studies, and is primarily concerned with the science and art of using statistics, data science and econometric methods for the analysis of economic/finance/marketing/climate data. Specializations within the Econometrics trace are Climate Econometrics, Econometric Theory, Econometrics and Data Science, Financial Econometrics, Marketing Data Science, and Quantitative Economics.