Browsing by Author "Yeh, Fang-Yu"

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Asymmetric impacts of international energy shocks on macroeconomic activities
(2012-05-01)
Yeh, Fang-Yu
;
Hu, Jin-Li
;
Lin, Cheng-Hsun
;
經營管理研究所
;
Institute of Business and Management
While limited by its scarcity of natural resources, the impacts of energy price changes on Taiwan's economic activities have been an important issue for social public and government authorities. This study applies the multivariate threshold model to investigate the effects of various international energy price shocks on Taiwan's macroeconomic activity. By separating energy price changes into the so-called decrease and increase regimes, we can realize different impacts of energy price changes and their shocks on economic output. The results confirm that there is an asymmetric threshold effect for the energy-output nexus. The optimal threshold levels are exactly where the oil price change is at 2.48%, the natural gas price change is at 0.66%, and the coal price.:hange is at 0.25%. The impulse response analysis suggests that oil price and natural gas shocks have a delayed negative impact on macroeconomic activities. (C) 2012 Published by Elsevier Ltd.
Environment-adjusted regional energy efficiency in Taiwan
(2011-08-01)
Hu, Jin-Li
;
Lio, Mon-Chi
;
Yeh, Fang-Yu
;
Lin, Cheng-Hsun
;
經營管理研究所
This study applies the four-stage DEA procedure to calculate the energy efficiency of 23 regions in Taiwan from 1998 to 2007. After controlling for the effects of external environments, only Taipei City, Chiayi City, and Kaohsiung City are energy efficient. Note that Kaohsiung City reaches the efficiency frontier due to the adjustment via partial environmental factors such as higher education attainment and transport vehicles. We also find a worsening trend for Taiwan's energy efficiency. Not only is there a gap of energy efficiency between Taiwan's metropolitan areas and the other regions, but the gap has also widened in recent years. Those inefficient counties should be given priority and the savings potential. Except for road density, the evidence indicates that each environmental factor has partial incremental effects on input slacks. As more cars and motorcycles are unfavorable externalities affecting partial energy efficiency, the central government should help local governments retire inefficient old motor vehicles, encourage energy-saving vehicle models, and provide convenient mass transportation systems. Besides, people with higher education cause industrial energy inefficient in Taiwan. The conscious of effective energy saving is necessary to schools, communities, and employee accordingly. (C) 2011 Elsevier Ltd. All rights reserved.
Total-factor water efficiency of regions in China
(2006-12-01)
Hu, Jin-Li
;
Wang, Shih-Chuan
;
Yeh, Fang-Yu
;
經營管理研究所
;
Institute of Business and Management
Water is a limited and unevenly distributed resource in China, with the per capita amount of water resource there only about one-fourth of the world's average. However, water is an essential resource for people's lives and economic development. Over the past two decades China has seen the fruit of its rapid economic growth; nevertheless, a severe water shortage is behind this prosperous scenario and is becoming worse. Efficient water supply is certainly essential for the sustainable development of human beings. This paper analyzes water efficiency by incorporating water as an input as well as using conventional inputs such as labor employment and capital stock. An index of a water adjustment target ratio (WATR) is established from the production frontier constructed by data envelopment analysis (DEA) including water as an input. The water efficiency of regions is obtained from a total-factor framework with both residential and productive water use. A U-shape relation is discovered between the total-factor water efficiency and per capita real income among areas in China. The central area has the worst water efficiency ranking and the total adjustment amount of water used there is around three-fourths of China's total. More efficient production processes and advanced technologies need to be adopted in the central area to improve its water efficiency, especially for its productive use of water. (c) 2007 Elsevier Ltd. All rights reserved.