Skip navigation
Logo
User training | Reference and search service

Library catalog

Retrievo
EDS
b-on
More
resources
Content aggregators
Please use this identifier to cite or link to this item:

acessibilidade

http://hdl.handle.net/10071/8060
acessibilidade
Title: Bayesian estimation of inefficiency heterogeneity in stochastic frontier models
Authors: Galán, J. E.
Veiga, H.
Wiper, M. P.
Keywords: Stochastic Frontier Models
Efficiency
Unobserved Heterogeneity
Bayesian Inference
Issue Date: 2014
Publisher: Springer
Abstract: Estimation of the one sided error component in stochastic frontier models may erroneously attribute firm characteristics to inefficiency if heterogeneity is unaccounted for. However, unobserved inefficiency heterogeneity has been little explored. In this work, we propose to capture it through a random parameter which may affect the location, scale, or both parameters of a truncated normal inefficiency distribution using a Bayesian approach. Our findings using two real data sets, suggest that the inclusion of a random parameter in the inefficiency distribution is able to capture latent heterogeneity and can be used to validate the suitability of observed covariates to distinguish heterogeneity from inefficiency. Relevant effects are also found on separating and shrinking individual posterior efficiency distributions when heterogeneity affects the location and scale parameters of the one-sided error distribution, and consequently affecting the estimated mean efficiency scores and rankings. In particular, including heterogeneity simultaneously in both parameters of the inefficiency distribution in models that satisfy the scaling property leads to a decrease in the uncertainty around the mean scores and less overlapping of the posterior efficiency distributions, which provides both more reliable efficiency scores and rankings.
Peer reviewed: Sim
URI: http://link.springer.com/article/10.1007/s11123-013-0377-4#page-1
https://ciencia.iscte-iul.pt/public/pub/id/16457
http://hdl.handle.net/10071/8060
ISSN: 0895-562X
Publisher version: The definitive version is available at: http://dx.doi.org/10.1007/s11123-013-0377-4
Appears in Collections:BRU-RI - Artigo em revista científica internacional com arbitragem científica

Files in This Item:
acessibilidade
File Description SizeFormat 
post_print_VeigaH2014 JPA.pdf645.19 kBAdobe PDFView/Open


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Currículo DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.