Environmental Economics
Mohammad Nabi Shahiki Tash; Mostafa khajehhasani; Morteza Yaqubi
Abstract
Monopoly and negative externalities are two aspects of market failure that affect the market performance. This study extends the Leibenstein approach, a framework to measure the market performance, which evaluates the social welfare costs of market power and environmental inefficiency. To assess the ...
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Monopoly and negative externalities are two aspects of market failure that affect the market performance. This study extends the Leibenstein approach, a framework to measure the market performance, which evaluates the social welfare costs of market power and environmental inefficiency. To assess the deadweight loss, we capture pollution impacts, on the market performance in an imperfect competition. In doing so, we assess marginal costs and price elasticity of demand by a Translog function, market power by Herfindahl-Hirschman and Lerner indices, and environmental inefficiency by directional distance functions, at a Cournot competition for Iran’s energy-intensive industries at the four-digit ISIC level. Our results demonstrate that the social welfare costs of welfare triangle and economic rent are negligible and include a small amount of welfare costs. Non-ferrous foundry imposes the lowest social cost (1.03% of its production value), and cement, lime and gypsum industries impose the highest social cost (50.7% of their production value). Those industries with more market power pay less attention to the environment. In polluting industries, welfare loss, due to market power, is relatively negligible. However, relatively high cost of social welfare, due to environmental inefficiency, indicates the necessity of levying a green tax to reduce the adverse effects.
Forough Jahantigh; Mohammad Nabi Shahiki Tash; Mosayeb Pahlavani
Abstract
The main objective of this research is to evaluate the social costs of monopoly in Iranian concentrated industries during 1996-2006. Leibenstein approach has been employed to evaluate the social costs. Leibenstein believed that most monopolistic industries operate inefficiently because of being in the ...
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The main objective of this research is to evaluate the social costs of monopoly in Iranian concentrated industries during 1996-2006. Leibenstein approach has been employed to evaluate the social costs. Leibenstein believed that most monopolistic industries operate inefficiently because of being in the safe margin. Hence, he proposed that the costs of inefficiency be added to the welfare triangle. Results show that "manufacture of tobacco products, recycling, mnufacture of medical, precision and optical instruments, watches and clocks, manufacture of coke, refined petroleum products and nuclear fuel, manufacture of fabricated metal products, except machinery and equipment " have imposed the most social cost on the society due to their inefficiency and deadweight loss of the welfare triangle. The social cost that these industries imposed on the society is equal to 100.47, 54.701, 41.039, 39.509 and 31.241 percent of the sales, respectively. In other words, a social cost of 24.01 percent of the sales is imposed on consumers in Iran by the concentrated industries.