| Summary: | 博士 === 國立中興大學 === 應用經濟學系所 === 100 === This dissertation is composited of three applications of the metafrontier approach in the studies of technical efficiency and productivity growth. The first study which analyses the profit efficiency in two banking groups, the financial holding banks and the commercial banks, in Taiwan during the period 2002-2005 are studied, assuming that the stochastic frontier function models have technical inefficiency effects. A translog profit function was estimated using balanced panel data for a sample of 34 banks over the study period. The overall results indicate that average profit efficiency relative to the metafrontier is higher for commercial banks than that of financial holding banks during the study period. The second study measures environmental efficiency (EE) in 63 countries over the period 1981–2005 and analyzes whether adoption of the Kyoto Protocol is accompanied with an increase in environmental efficiency during the same period. EE across countries under distinct country specific production frontier as well as with regard to the metafrontier are measured using directional distance function model, which incorporates desirable output (GDP) and undesirable output (CO2 emissions). The metafrontier for four country groups, high income countries, upper-middle income countries, low-middle income countries, and low income countries, are estimated using balanced panel data for the sample countries over the study period. It is found that lower-middle income countries achieved highest progress in their average environmental efficiency relative to the metafrontier while low income countries recorded lowest growth in their the average EE. The third study, again using directional distance function model, measures Green (environmental) Productivity in 70 countries, which is grouped into developed countries and NICs and developing countries, over the period 1981–2007. The Green Productivity in each country of the two groups is computed by aggregating technical efficiency change, technical change, and scale efficiency change. The results revealed that developing countries achieved higher growth in their average Green Productivity relative to the metafrontier.
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