Bayesian artificial neural networks for frontier efficiency analysis

M Tsionas, CF Parmeter, V Zelenyuk - Journal of Econometrics, 2023 - Elsevier
Artificial neural networks have offered their share of econometric insights, given their power
to model complex relationships. One area where they have not been readily deployed is the …

Technical efficiency of Islamic and conventional banks with undesirable output: Evidence from a stochastic meta-frontier directional distance function

M Safiullah, A Shamsuddin - Global Finance Journal, 2022 - Elsevier
We examine technical efficiency of Islamic and conventional banks. We contribute to the
literature by applying a stochastic meta-frontier directional distance function model with …

Optimal combinations of stochastic frontier and data envelopment analysis models

MG Tsionas - European Journal of Operational Research, 2021 - Elsevier
Recent research has shown that combination approaches, such as taking the maximum or
the mean over different methods of estimating efficiency scores, have practical merits and …

Bank governance and crisis-period efficiency: A multinational study on Islamic and conventional banks

M Safiullah - Pacific-Basin Finance Journal, 2020 - Elsevier
This study examines the effect of Islamic banks' dual board governance mechanisms
(Shariah supervisory board and regular board of directors) on technical efficiency; and …

Clustering and meta-envelopment in data envelopment analysis

MG Tsionas - European Journal of Operational Research, 2023 - Elsevier
We propose techniques of classification of a potentially heterogeneous data set into groups
in a way that is consistent with the intended purpose of the clustering, which is Data …

Quantile stochastic frontiers

MG Tsionas - European Journal of Operational Research, 2020 - Elsevier
In this paper, based on Jradi and Ruggiero (2019). Stochastic Data Envelopment Analysis: A
Quantile Regression Approach to Estimate the Production Frontier. European Journal of …

[HTML][HTML] Minimax regret priors for efficiency estimation

MG Tsionas - European Journal of Operational Research, 2023 - Elsevier
We propose a minimax regret empirical prior for inefficiencies in a stochastic frontier model
and for its other parameters. The class of priors over which we consider minimax regret is …

The impact of Brexit on bank efficiency: Evidence from UK and Ireland

XL Fernández, D Paz-Saavedra, P Coto-Millán - Finance Research Letters, 2020 - Elsevier
The withdrawal of the United Kingdom (UK) from the European Union (EU) opens an
unprecedented scenario for the UK and EU economy. One of the sensitive points concerns …

Nonparametric, stochastic frontier models with multiple inputs and outputs

L Simar, PW Wilson - Journal of Business & Economic Statistics, 2023 - Taylor & Francis
Stochastic frontier models along the lines of Aigner et al. are widely used to benchmark
firms' performances in terms of efficiency. The models are typically fully parametric, with …

[HTML][HTML] A generalized inefficiency model with input and output dependence

MG Tsionas - European Journal of Operational Research, 2024 - Elsevier
In this paper we propose a general inefficiency model, in the sense that technical
inefficiency is, simultaneously, a function of all inputs, outputs, and contextual variables. We …