1. dsa::daily_data
    Exemplary time series
    csv| rda| rds
    xts|3430 x 6
  2. dsa::dsa_examples
    Exemplary dsa outputs
    rda| rds
    list
  3. dsa::holidays
    Data set for frequently used regressors
    csv| rda| rds
    xts|46021 x 131