A study on directional returns to scale

作者：

Highlights：

• Directional returns to scale (RTS) and directional congestion effects are explained.

• Yang's approach is used to estimate directional RTS and the effect of directional congestion.

• All this is illustrated for biological institutes of the Chinese Academy of Sciences.

• Regions of increasing (constant, decreasing) directional RTS are detected.

• Directional congestion effects occurring for many directions are detected.

摘要

•Directional returns to scale (RTS) and directional congestion effects are explained.•Yang's approach is used to estimate directional RTS and the effect of directional congestion.•All this is illustrated for biological institutes of the Chinese Academy of Sciences.•Regions of increasing (constant, decreasing) directional RTS are detected.•Directional congestion effects occurring for many directions are detected.

论文关键词：Returns to scale (RTS),Directional returns to scale,Congestion,Directional congestion,Evaluation of research institutes

论文评审过程：Received 31 December 2013, Revised 5 May 2014, Accepted 5 May 2014, Available online 10 June 2014.

论文官网地址：https://doi.org/10.1016/j.joi.2014.05.004