研討日期

2009年01月10日上午10:20 ~ 13:00

研討地點

台大社科院第四會議室

討論文獻

題目

作者

文獻出處

Environmental quality competition and eco-labeling

Gregory S. Amacher

Erkki Koskela

Markku Ollikainen

Journal of Environmental Economics and Management

報告人

林晏如

參加人員

黃鴻、吳芝文、陳宏易、王佳琪、梁文榮、張民忠、彭正浩、林燕淑、張瑞雲、蔡明芳、陳金盛、林大鈞、曾靜枝、張志偉、高國峰、林晏如、丁虹仁、王光正、楊雅博

論文提要

A three-stage game of invest, environmental quality provision and price competition is developed to study the impact of green technology investment (eco-labeling), in a duopoly model of vertical product differentiation. This paper use a specific form for the marginal cost, derived by adding the fixed cost component of investment to the quadratic form common in the vertical product differentiation literature.

They show that firms’ incentives to invest in technologies (and obtain ecolabels) depend crucially on the differences in cost structures between firms. When firms are identical with respect to fixed costs, both firms will always invest in the green technology. If the high-quality firm is more efficient at the margin in investing, then it invests, but the low-quality firm may or may not invest depending on the unit cost of investment. The opposite holds if the low-quality firm is more efficient at investing.

They also find that quality dispersion between products chosen by profit maximizing firms is too high, but average quality is too low from the view point of social welfare. But if the high-quality firm is more efficient in investment, then quality dispersion and average quality are both too low. This is because the high-quality firm may underprovide environmental quality , while the low-quality firm always under-provides environmental quality. Otherwise, this possibility for underproviding high quality is increased by the presence of environmental externalities.

研究建議

1.考慮uncoverage 對決策結果之影響

2.應用於水平異質模型，多考慮投資決策的階段

備註