Late again, whithout Monotonicity
Monotonicity is not necessary for the Wald ratio to identify a Local Average Treatment Effect. Under random assignment and exclusion restriction, if for every value of potential outcomes there are more compliers than defiers, the Wald ratio identifies the average treatment effect within a subpopulation of compliers. I use a simple Roy selection model to show that this "less defiers than compliers" condition is substantially weaker than monotonicity. It has two implications which are testable from the data, and it is closely related to those testable implications. Similarly, the local monotonicity condition in Huber & Mellace (2012) is not necessary for their identification results to hold and can also be replaced by a substantially weaker condition
|Date of creation:||Jun 2012|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: 01 41 17 60 81
Web page: http://www.crest.fr
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Rashmi Barua & Kevin Lang, 2009.
"School Entry, Educational Attainment and Quarter of Birth: A Cautionary Tale of LATE,"
NBER Working Papers
15236, National Bureau of Economic Research, Inc.
- Kevin Lang & Rashmi Barua, 2010. "School Entry, Educational Attainment and Quarter of Birth: A Cautionary Tale of LATE," Boston University - Department of Economics - Working Papers Series WP2010-019, Boston University - Department of Economics.
- repec:hal:wpaper:halshs-00699646 is not listed on IDEAS
- repec:dgr:kubcen:200845 is not listed on IDEAS
- Abadie, Alberto, 2003. "Semiparametric instrumental variable estimation of treatment response models," Journal of Econometrics, Elsevier, vol. 113(2), pages 231-263, April.
- Clément De Chaisemartin & Xavier D'Haultfoeuille, 2012. "Late Again with Defiers," PSE Working Papers halshs-00699646, HAL.
- Huber, Martin & Mellace, Giovanni, 2012. "Relaxing monotonicity in the identification of local average treatment effects," Economics Working Paper Series 1212, University of St. Gallen, School of Economics and Political Science.
When requesting a correction, please mention this item's handle: RePEc:crs:wpaper:2012-12. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Florian Sallaberry)
If references are entirely missing, you can add them using this form.