.
arpu_summary[arpu_summary['campaign_channel'] == 'Control']['ARPU_change'].values[0] arpu_summary['DiD_effect'] = arpu_summary['ARPU_change'] - control_arpu_change arpu_summary Output: 4. Hasil Analisis Difference in Differences (DiD) Efek DiD pada Campaign Channel Berikut adalah ringkasan efek DiD