Estimating global frontier shifts and global Malmquist indices |
| |
Authors: | Mette Asmild Fai Tam |
| |
Institution: | (1) Industrial Economics Division, Nottingham University Business School, Wollaton Road, Nottingham, NG8 1BB, UK;(2) The Centre for Management of Technology and Entrepreneurship, University of Toronto, Toronto, Canada |
| |
Abstract: | The Malmquist index is a measure of productivity changes, of which an important component is the frontier shift or technological
change. Often technological change can be viewed as a global phenomenon, and therefore individual or local measures of technological
changes are aggregated into an overall measure, traditionally using geometric means. In this paper we propose a way of calculating
global Malmquist indices and global frontier shift indices which provides a better estimation of the true frontier shift and
furthermore is easy to calculate. Using simulation studies we show how this method outperforms the traditional aggregation
approach, especially for sparsely populated production possibility sets and for frontiers that also change shape over time.
Furthermore, our global indices can be used for unbalanced panels without disregarding any information. Finally, we show how
the global indices are meaningful for calculating differences between frontiers from different groups rather than different
time periods as illustrated in a small case study of bank branches in different countries.
|
| |
Keywords: | Data envelopment analysis (DEA) Malmquist productivity change index Frontier shifts/technical change Global indices |
本文献已被 SpringerLink 等数据库收录! |
|