def _load_collaborative_research(df):
    """_load_collaborative_research

    Args:
        df (pd.DataFrame): Collaborative research funding table from HESA (table-1).

    Returns:
        df (pd.DataFrame): Cash collaborative contributions as a proportion of public
            funding.
    """

    df = df[
            (df['Type of income'] == 'Collaborative contribution - Cash')
            & (df['Source of public funding'] == 'All')]
    df['Value'] = (df['Value'] * 1000).astype(int)
    return df