In this paper we aim to conduct inference on the “lift” effect generated by an online advertisement display: specifically we want to analyze if the presence of the brand ad among the advertisements on the page increases the overall number of consumer clicks on that page. A distinctive feature of online advertising is that the ad displays are highly targetedthe advertising platform evaluates the...

An Economic Analysis of Exclusion Restrictions for Instrumental Variable Estimation Instrumental variable estimation requires untestable exclusion restrictions. With policy effects on individual outcomes, there is typically a time interval between the moment the agent realizes that he may be exposed to the policy and the actual exposure or the announcement of the actual treatment status. In suc...

This paper considers the identi…cation and estimation of network models with agents interacting in multiple activities. We establish the model identi…cation using both linear and quadratic moment conditions. The quadratic moment conditions exploit the covariance structure of individuals’choices in the same and related activities, and facilitate the identi…cation of peer e¤ects when exclusion re...

We study how social networks change as a result of an exogenous expansion in formal financial access and show how to estimate the effects of these changes on household outcomes. We use a unique household panel dataset that contains detailed information on the network of informal financial transactions before and after a field experiment that randomized access to savings accounts in Nepal. First...

Sohrab Effati Department of Mathematical Sciences, Ferdowsi University of Mashhad, P.O. Box 917751159, Mashhad, Iran and Center of Excellence on Soft Computing and Intelligent Information Processing (SCIIP), Ferdowsi University of Mashhad, Mashhad, Iran [email protected] Alireza Nazemi∗ Department of Mathematics, School of Mathematical Sciences, Shahrood University, P.O. Box 3619995161-316, S...

F. ESMAEELZADEH∗,‡, R. A. KAMYABI GOL†,§ and R. RAISI TOUSI∗,¶ ∗Department of Pure Mathematics, Ferdowsi University of Mashhad P. O. Box 1159-91775, Mashhad, Iran †Department of Pure Mathematics, Ferdowsi University of Mashhad and Center of Excellence in Analysis on Algebraic Structures (CEAAS) P. O. Box 1159-91775, Mashhad, Iran ‡[email protected] §[email protected] ¶raisi...

aSchool of Public Health, Hormozgan University of Medical Sciences, Bandar Abbas; bDepartment of Medical Entomology & Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran; cDepartment of Pharmacognosy, Biotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad; dDepartment of Biotechnology, School of Pharmacy, Mashhad Uni...

1Student Research Committee, Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, IR Iran *Corresponding author: Amir Emami Zeydi, Student Research Committee, Department of Medical-Surgical Nursing, School of Nursing and Midwifery, Mashhad University of Medical Sciences, Mashhad, IR Iran. Tel: +98-9355952357, Fax: +98-51385915...

1 Assistant professor, Oro-maxillofacial developmental diseases research center, Department of oral medicine, Guilan University of Medical Sciences, Dental school, Rasht, Iran 2 Associate professor, Dental Research Center, Mashhad University of Medical Sciences, Dental School, Mashhad, Iran 3 Assistant professor, Department of Oral and Maxillofacial Radiology, Mashhad University of Medical Scie...

Corresponding author: Mohammad Hassan Nezafati Department of Cardiac Surgery Ghaem Hospital Mashhad University of Medical Sciences Mashhad, Iran PO Box: 91878544 Phone: +989151578421 Fax: +985136078099 E-mail: mhnezafati@yahoo. com 1 Cardiac Rehabilitation Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran 2 Department of Cardiac Su...