Methods for strengthening a weak instrument in the case of a persistent treatment

Berthélemy, MichelMichelBerthélemyBonev, PetyoPetyoBonevDussaux, DamienDamienDussauxSöderberg, MagnusMagnusSöderberg2023-04-132023-04-132019https://www.alexandria.unisg.ch/handle/20.500.14171/9908410.1515/snde-2015-0094enMethods for strengthening a weak instrument in the case of a persistent treatmentjournal article