This paper explores the optimal environmental tax and level of privatization in an international duopolistic market. We show that when the government is able to control the environmental tax and the extent of privatization, the optimal environmental tax is lower than the standard Pigouvian level. We also show that the optimal level of privatization of state-owned enterprises is partial privatization. Further, the optimal level of privatization is inversely dependent on the cleanup cost of past environmental contamination. Copyright Springer Science+Business Media, Inc. 2006Environmental policy, International trade, Privatization, F12, L33, Q58,

This paper compares price and quantity competition in a mixed duopoly with emission tax; in a mixed duopoly, one public firm competes with one private firm in the market. We find that social welfare is the highest when both the firms simultaneously choose price levels. Then, the optimal emission tax is sufficiently lower than the marginal social damage.

This paper investigates the optimal rate of environmental tax and level of privatization in a vertical relationship between one partially privatized producer and two private sellers. The main results are as follows: First, privatization of the producer firm decreases environmental damage. Second, the optimal environmental tax rate equals the Pigouvian level. Third, fully nationalizing the producer firm is optimal when the government simultaneously decides upon the environmental tax rate; then, privatization decreases social welfare.

To analyze the motivations of Japanese companies to take environmental actions to reduce their greenhouse gas (GHG) emissions, we used FY2006 research data and questioned Japanese industries regarding their reduction of GHG emissions. Empirical investigations revealed that voluntary targets set by industry organizations, government requirements, and advance responses to possible future regulations can positively influence environmental actions for GHG emission reduction; however, cost reductions and corporate social responsibility fulfillment cannot.

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