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  1. No Access

    Chapter

    A Hierarchical Panel Data Model for the Estimation of Stochastic Metafrontiers: Computational Issues and an Empirical Application

    In the metafrontier literature, firms are put into groups, generally defined by technology or geography. Each group has its own technological frontier, and the metafrontier is the upper bound of these group fr...

    Christine Amsler, Yi Yi Chen, Peter Schmidt… in Advanced Mathematical Methods for Economic… (2023)

  2. Article

    Open Access

    Mediating effect of self-efficacy on the relationship between social support and self-management behaviors among patients with knee osteoarthritis: a cross-sectional study

    Good self-management behaviors in patients with knee osteoarthritis can improve disease awareness, treatment effectiveness, quality of life, and reduce medical costs. However, there is a paucity of studies foc...

    Yi-Yi Chen, Li-Chueh Weng, Yang-Tzu Li, Hsiu-Li Huang in BMC Geriatrics (2022)

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  3. No Access

    Article

    A hierarchical panel data stochastic frontier model for the estimation of stochastic metafrontiers

    This paper proposes a stochastic frontier model with three composed errors, and therefore six error components. As in the metafrontier literature, firms belong to groups with a group-specific frontier. A firm ...

    Christine Amsler, Yi Yi Chen, Peter Schmidt, Hung Jen Wang in Empirical Economics (2021)

  4. No Access

    Article

    A Bayesian estimator for stochastic frontier models with errors in variables

    A Bayesian estimator is proposed for a stochastic frontier model with errors in variables. The model assumes a truncated-normal distribution for the inefficiency and accommodates exogenous determinants of inef...

    Sheng-Kai Chang, Yi-Yi Chen, Hung-Jen Wang in Journal of Productivity Analysis (2012)