eprintid: 14703 rev_number: 30 eprint_status: archive userid: 600 dir: disk0/00/01/47/03 datestamp: 2009-07-31 15:26:05 lastmod: 2015-07-23 09:36:25 status_changed: 2009-07-31 15:26:05 type: working_paper metadata_visibility: show item_issues_count: 0 creators_name: Chesher, A. creators_id: ACHES26 title: Instrumental Values ispublished: pub subjects: 12042 subjects: 12000 divisions: F24 abstract: This paper studies the identification of partial differences of nonseparable structural functions. The paper considers triangular structures with no more stochastic unobservables than observable outcomes, that exhibit a degree of monotonicity with respect to variation in certain stochastic unobservables. It is shown that, the existence of a set of instrumental values of covariates, over which the stochastic unobservables exhibit local quantile invariance and over which a local order condition holds, defines a model which identifies certain partial differences of structural functions. This result is useful when covariates exhibit discrete variation. The paper also considers the identification of partial derivatives in smooth structures when covariates exhibit continuous variation. date: 2002-09 publisher: Institute for Fiscal Studies official_url: http://www.cemmap.ac.uk/publications.php?publication_id=2653 vfaculties: VSHS oa_status: green language: eng primo: open primo_central: open_green lyricists_name: Chesher, A lyricists_id: ACHES26 full_text_status: public series: cemmap Working Papers number: CWP17/ place_of_pub: London, UK citation: Chesher, A.; (2002) Instrumental Values. (cemmap Working Papers CWP17/). Institute for Fiscal Studies: London, UK. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/14703/1/14703.pdf