Ignace Van de Woestyne

27 papers Journal 27
YearRankTypeTitle / Venue / Authors
2026 J jnl
An exploratory analysis of learning from peers: Radial vs. nonradial efficiency measures and convex vs. nonconvex technologies.
Eur. J. Oper. Res.
Kristiaan Kerstens, Bart Roets, Ignace Van de Woestyne, Shirong Zhao
2026 J jnl
When cost metafrontiers are nonconvex in the outputs, then the production metafrontier is nonconvex: the price of a convexification strategy.
Eur. J. Oper. Res.
Kristiaan Kerstens, Christopher O'Donnell, Ignace Van de Woestyne, Shirong Zhao
2024 J jnl
Convex and nonconvex nonparametric frontier-based classification methods for anomaly detection.
OR Spectr.
Qianying Jin, Kristiaan Kerstens, Ignace Van de Woestyne
2024 J jnl
Correction to: Malmquist productivity indices and plant capacity utilisation: new proposals and empirical application.
Ann. Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Ignace Van de Woestyne, Linjia Zhang
2024 J jnl
Evaluating different groups of mutual funds using a metafrontier approach: Ethical vs. non-ethical funds.
Eur. J. Oper. Res.
Qianying Jin, Antonella Basso, Stefania Funari, Kristiaan Kerstens, Ignace Van de Woestyne
2022 J jnl
Malmquist productivity indices and plant capacity utilisation: new proposals and empirical application.
Ann. Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Ignace Van de Woestyne, Linjia Zhang
2022 J jnl
Procedures for ranking technical and cost efficient units: With a focus on nonconvexity.
Eur. J. Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Mehdi Toloo, Ignace Van de Woestyne
2021 J jnl
Cost functions are nonconvex in the outputs when the technology is nonconvex: convexification is not harmless.
Ann. Oper. Res.
Kristiaan Kerstens, Ignace Van de Woestyne
2020 J jnl
Metafrontier productivity indices: Questioning the common convexification strategy.
Eur. J. Oper. Res.
Qianying Jin, Kristiaan Kerstens, Ignace Van de Woestyne
2020 J jnl
Plant capacity notions in a non-parametric framework: a brief review and new graph or non-oriented plant capacities.
Ann. Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Ignace Van de Woestyne
2019 J jnl
Convex and nonconvex input-oriented technical and economic capacity measures: An empirical comparison.
Eur. J. Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Ignace Van de Woestyne
2019 J jnl
Metatechnology frontier and convexity: A restatement.
Eur. J. Oper. Res.
Kristiaan Kerstens, Christopher O'Donnell, Ignace Van de Woestyne
2019 J jnl
Plant Capacity and Attainability: Exploration and Remedies.
Oper. Res.
Kristiaan Kerstens, Jafar Sadeghi, Ignace Van de Woestyne
2019 J jnl
Short- and long-run plant capacity notions: Definitions and comparison.
Eur. J. Oper. Res.
Giovanni Cesaroni, Kristiaan Kerstens, Ignace Van de Woestyne
2018 J jnl
Enumeration algorithms for FDH directional distance functions under different returns to scale assumptions.
Ann. Oper. Res.
Kristiaan Kerstens, Ignace Van de Woestyne
2018 J jnl
Testing general and special Färe-Primont indices: A proposal for public and private sector synthetic indices of European regional expenditures and tourism.
Eur. J. Oper. Res.
Walter Briec, Kristiaan Kerstens, Diego Prior, Ignace Van de Woestyne
2017 J jnl
Estimating scale economies in non-convex production models.
J. Oper. Res. Soc.
Giovanni Cesaroni, Kristiaan Kerstens, Ignace Van de Woestyne
2017 J jnl
Global and local scale characteristics in convex and nonconvex nonparametric technologies: A first empirical exploration.
Eur. J. Oper. Res.
Giovanni Cesaroni, Kristiaan Kerstens, Ignace Van de Woestyne
2015 J jnl
Frontier-based vs. traditional mutual fund ratings: A first backtesting analysis.
Eur. J. Oper. Res.
Olivier Brandouy, Kristiaan Kerstens, Ignace Van de Woestyne
2014 J jnl
A note on a variant of radial measure capable of dealing with negative inputs and outputs in DEA.
Eur. J. Oper. Res.
Kristiaan Kerstens, Ignace Van de Woestyne
2014 J jnl
Comparing Malmquist and Hicks-Moorsteen productivity indices: Exploring the impact of unbalanced vs. balanced panel data.
Eur. J. Oper. Res.
Kristiaan Kerstens, Ignace Van de Woestyne
2014 J jnl
Nonparametric cost and revenue functions under constant economies of scale: an enumeration approach for the single output or input case.
Int. Trans. Oper. Res.
Walter Briec, Kristiaan Kerstens, Ignace Van de Woestyne
2014 J jnl
Solution Methods for nonconvex Free disposal Hull Models: a Review and some Critical Comments.
Asia Pac. J. Oper. Res.
Kristiaan Kerstens, Ignace Van de Woestyne
2013 J jnl
Portfolio selection with skewness: A comparison of methods and a generalized one fund result.
Eur. J. Oper. Res.
Walter Briec, Kristiaan Kerstens, Ignace Van de Woestyne
2012 J jnl
Benchmarking mean-variance portfolios using a shortage function: the choice of direction vector affects rankings!
J. Oper. Res. Soc.
Kristiaan Kerstens, Amine Mounir, Ignace Van de Woestyne
2011 J jnl
Geometric representation of the mean-variance-skewness portfolio frontier based upon the shortage function.
Eur. J. Oper. Res.
Kristiaan Kerstens, Amine Mounir, Ignace Van de Woestyne
2011 J jnl
Negative data in DEA: a simple proportional distance function approach.
J. Oper. Res. Soc.
Kristiaan Kerstens, Ignace Van de Woestyne