get_event_dates

era_pl.get_event_dates(
    data,
    trading_dates=None,
    permno='permno',
    event_date='event_date',
    win_start=0,
    win_end=0,
    end_event_date=None,
    data_dir=None,
)

Expand event dates into trading-day windows.

Events are matched to trading days using get_annc_dates() and then shifted by win_start and win_end to produce event-window bounds. If trading_dates is omitted, CRSP dsi data are loaded from the local parquet store.