1. midasml::alfred_vintages
    ALFRED monthly and quarterly series vintages
  2. midasml::market_ret
    SNP500 returns
  3. midasml::rgdp_dates
    Real GDP release dates
  4. midasml::rgdp_vintages
    Real GDP vintages
  5. midasml::us_rgdp
    US real GDP data with several high-frequency predictors