eprintid: 10128117 rev_number: 13 eprint_status: archive userid: 608 dir: disk0/10/12/81/17 datestamp: 2021-05-18 15:49:18 lastmod: 2021-05-18 15:49:18 status_changed: 2021-05-18 15:49:18 type: working_paper metadata_visibility: show creators_name: Kitagawa, T title: A bootstrap test for instrument validity in heterogeneous treatment effect models ispublished: pub divisions: UCL divisions: A01 divisions: B03 divisions: C03 divisions: F24 note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. abstract: This paper develops a specification test for the instrument validity conditions in the heterogeneous treatment effect model with a binary treatment and a discrete instrument. A necessary testable implication for the joint restriction of instrument exogeneity and instrument monotonicity is given by nonnegativity of point-identifiable complier’s outcome densities. Our specification test infers this testable implication using a Kolmogorov-Smirnov type test statistic. We provide a bootstrap algorithm to implement the proposed test and show its asymptotic validity. The proposed test procedure can apply to both discrete and continuous outcome cases. date: 2013-10-15 date_type: published publisher: Centre for microdata methods and practice (cemmap) official_url: https://www.cemmap.ac.uk/publication/a-bootstrap-test-for-instrument-validity-in-heterogeneous-treatment-effect-models/ full_text_type: pub language: eng verified: verified_manual elements_id: 442852 doi: 10.1920/wp.cem.2013.5313 lyricists_name: Kitagawa, Toru lyricists_id: TKITA87 actors_name: Allington-Smith, Dominic actors_id: DAALL44 actors_role: owner full_text_status: restricted series: cemmap Working Paper number: 53/13 place_of_pub: London, UK pages: 43 citation: Kitagawa, T; (2013) A bootstrap test for instrument validity in heterogeneous treatment effect models. (cemmap Working Paper 53/13). Centre for microdata methods and practice (cemmap): London, UK. document_url: https://discovery.ucl.ac.uk/id/eprint/10128117/1/Kitagawa_CWP5313.pdf