Market structure, pigouvian taxation, and welfare

Using a short-run partial equilibrium model of social welfare, this paper examines the social welfare implications of changing Pigouvian taxes under three markets: perfect competition, monopoly, and Cournot oligopoly. The result for perfect competition supports the earlier finding that Pigouvian taxation increases social welfare [Buchanan, 1969]. However, in contrast to the previous result that Pigouvian taxes lower welfare under monopoly, the authors show that if the noncompetitive distortion is small, these taxes might still be useful in correcting monopoly-generated externalities and in improving social welfare. Cournot firms react to the tax depending upon their individual perceptions of the gain in post-tax marginal revenue. Policy implications of the study's results are discussed.     

Have Industrial Robots Improved Pollution Reduction? A Theoretical Approach and Empirical Analysis

To investigate whether industrial robots have improved the ecological environment, this study integrated the adoption of robot technology and pollution abatement into Melitz's heterogeneous firm model. This showed that using robots in production can lower firms' pollution intensity by increasing their abatement investments, and this reduction effect is greater for higher polluting firms and those subject to weaker local environmental regulations. These theoretical expectations were then confirmed through a series of empirical investigations based on Bartik instrument regressions, with multiple robustness checks as well as heterogeneity and mechanism analyses. This paper adds to the literature on the relationships between automation technologies and green transformation. It shows that in the pursuit of economic growth and environmental protection, it is necessary for policymakers to shift from pollution control to technical support for traditional manufacturing firms.     

Welfare Ranking of Environmental Policies in the Presence of Capital Mobility and Cross‐Border Pollution

We construct a model of two regions with cross‐border pollution, and with inter‐regional (regional capital mobility [RCM]) or international (international capital mobility [ICM]) capital mobility. Each region uses emission taxes, or intra‐regionally, or inter‐regionally tradable emission permits to reduce pollution. We show that the non‐cooperative settings of all three instruments are always inefficient relative to their cooperative settings. When regions are symmetric, then (i) with RCM the non‐cooperative setting of intra‐regionally tradable emissions permits is welfare superior to that of the other two instruments, (ii) with ICM the non‐cooperative settings of intra‐regionally tradable emission permits and of emission taxes are equivalent and superior to that of inter‐regionally tradable emission permits, and (iii) with ICM the three instruments are equivalent only when cross‐border pollution is perfect.     

Consumer discrimination,duopoly, and black firm entry: The welfare effect of subsidies

Consumer discrimination, to the extent that it lowers expected profit for black owned firms, discourages the entry of new black firms. From a social welfare perspective, consumer discrimination may be welfare reducing, since market output is lower than otherwise. If so, a policy intervention that subsidizes new black firms may improve social welfare. This article presents a simple model of duopoly where consumer discrimination exists with uncertainty, and the only cost of production is a “loss of sales” cost. Given the Nash equilibrium, in which a black and white firm must select a price to charge, conditions are derived for which a profit subsidy to a new black firm increases, decreases, or has no effect on social welfare.     

Do Firms Time Their Pollution Abatement Investments Optimally?

In this paper we develop an equilibrium business-cycle model for an economy with both clean and dirty (polluting) plants. We conclude that the best time to implement cleaner production technologies is during a slowdown of the economy. Due to external effects and market failures the timing of pollution abatement investments is not expected to be optimal in the real world. We test the optimality of the timing of those investments with data for Germany, the Netherlands, and the USA. It appears that for more than 25 per cent of the sectors pollution abatement investments show significant counter-cyclical behaviour, while in 10 per cent of the sectors these investments are pro-cyclical.     

Export taxes and income distribution: The Philippines coconut levy

Export Taxes and Income Distribution: The Philippines Coconut Levy. — A large, empirically based general equilibrium model of the Philippine economy is used to analyze the implications of a tax on coconut oil exports. The analysis shows how general equilibrium models can be used to derive optimal tax rates and to show the detailed relationship between the rates at which these taxes are applied and their economic effects. The analysis explores in particular the effects such taxes have on economic welfare and on income distribution within the country. The distributional effects of this export tax are shown to be highly regressive, revealing more clearly the policy trade-offs such taxes involve.     

On the trade,growth, and welfare effects of intellectual property rights protection

To examine how intellectual property rights protection affects trade, growth, and welfare, I develop a two-country R&D-based growth model in which final goods firms in both countries determine the range of imported varieties in the overall use of intermediate inputs. I show that strengthening patent protection in either country increases the range of imported varieties of intermediate goods and stimulates economic growth in the country that strengthened patent protection. Moreover, I also show that the Nash equilibrium level of patent protection is stronger than the globally optimal level of patent protection.     

Pollution and the firm Robert E. Kohn Edward Elgar, 1998, 251 pp.

The book, Pollution and the Firm, by Robert E. Kohn, provides a detailed and nearly definitive look at the application of Pigouvian taxation applied to competitive polluting firms in a static, general equilibrium framework. The reader is offered the most thorough examination of how the firm's long-run scale of output is related to the activities of pollution abatement and avoidance of which this reviewer is aware. While the reader would be advised to treat with skepticism some of the results of the models involving uncertainty, the overall set of models offers an excellent set of derivations and conclusions. Any student of firm-generated externalities would gain by exposure to this book.     

Measuring Green Productivity Growth for China's Manufacturing Sectors: 1991–2000*

Over the past two decades, China has sustained rapid economic growth of 8–10 percent, part of which is attributed to the positive total factor productivity (TFP) growth. However, this extraordinary economic performance has been accompanied by severe environmental pollution and associated health damage. The conventional TFP method is biased in interpreting the progress of technology change because it does not consider non‐marketable residues, such as environmental pollution, and, hence, efficiency improvements in terms of pollution abatement technology and environmentally friendly management are ignored. This bias might direct our attention to less efficient use of environmental friendly abatement technologies or send wrong signals to policy‐makers. To address this issue, the present paper applies a modified welfare‐based green TFP approach, treating environmental damage as non‐desirable (negative) residual output. Therefore, environmental efficiency is taken into account to accurately interpret technological progress from a social welfare point of view. Based on a national time‐series input–output table, historical capital and labor input data for China and sectoral level air pollution emission data from 1991 to 2000, the empirical results suggest that with increasingly stringent environmental regulations, many pollution intensive sectors, such as electricity, primary metal and chemical industries, improved their environmental efficiency in the late 1990s. However, because of the weak environmental regulations in construction and transportation, and in sectors primarily composed of small private or township and village industrial enterprises, firms within these industries contributed to increasing environmental degradation.     

Subsidizing Non-Polluting Goods vs. Taxing Polluting Goods for Pollution Reduction

Pigovian taxes on polluters are politically unpopular, but subsidies for non-polluting sources are politically attractive. This paper presents a linear demand and supply model and numerical example to explore the trade-offs between taxing polluting sources of a good versus subsidizing non-polluting sources of the same good. While the model (along with the associated numerical example) shows the optimality of Pigovian taxes, it also shows how much welfare is reduced if subsidies for nonpolluters are employed instead. Further, it shows the optimal tax, given any level of subsidy and the optimal subsidy, given any level of tax.     

Fragmentation,welfare, and imperfect competition

In this paper, we explore the effect of fragmentation of production processes on social welfare in the imperfectly competitive market. We consider a situation in which firms located in a country strategically decide whether they produce at home or move their production overseas. We show that, in such a situation, there exists a Nash equilibrium in which all of the firms move production overseas although domestic production is socially desirable. This implies that “reverse imports” do not necessarily benefit the country. We also discuss the effectiveness of a subsidy for domestic production in improving the social welfare of the country. J. Japanese Int. Economies 21 (3) (2007) 365–378.     

Environmental taxation and employment

Summary This paper explores how environmental taxes affect employment. It argues that the case for environmental taxes should rest on environmental grounds rather than possibly favorable employment effects. Using pollution taxes to shift the tax burden away from labor is likely to be difficult for economic, social, and political reasons. Moreover, these taxes are likely to raise the overall tax burden-even if the revenues are recycled as lower distortionary taxes. To stimulate employment, governments should rely on alternative instruments targeted at the labor market.     

Pollution abatement costs and technical changes under different environmental regulations

Balancing economic growth and environmental protection is a global issue that requires both scientific and economic consideration. In this study, we employed a joint production model that accounted for both favorable and unfavorable outputs to calculate the changes in pollution abatement costs (PACs) and the decomposition of SO₂ emissions in China's industrial sector from 2001– to 2015. Command-and-control and tradable permit environmental regulation scenarios were specified to assess PACs and changes in these costs associated with changes in technology, input, and unfavorable output production. Our empirical results show that the PACs increased by 0.06% and 0.34% under command-and-control and tradable permit scenarios, respectively. Further analyses of these changes indicated that regulated technology grew faster than unregulated under both scenarios; overall, command-and-control regulations were more conducive to green technological innovations. Both types of environmental regulation reduced industrial SO₂ emissions, and the difference between them was minimal. Under the two scenarios, the pollution emissions intensity decreased. Moreover, because the tradable permit policy improved favorable output production via the optimal allocation of resources, the intensity of pollution emissions was significantly lower. As there were advantages to both regulatory options, their balanced application is vital in the short-run. In the long-term, measures should be taken to ensure the full trading of SO₂ emission rights. The focus of environmental policies should gradually shift to an emissions trading system to achieve the balanced development of China's environment and economy.     

基于研发成功率的R&D模型

为了研究研发成功率对研发支出和产出水平的影响,在吸收能力和溢出效应的R&D模型中引入研发成功率并利用两阶段子博弈精炼完美纳什均衡求解。当研发成功率大于50%时,无论吸收能力和溢出效应有多大,研发支出增加会导致产出增加。合作研发和非合作研发中,研发成功率上升均会引起研发支出水平和产出水平的增加。在非合作研发中,吸收能力和溢出效应的增加会导致产出水平和研发支出水平的减少;而在合作研发中,吸收能力与溢出效应的增加会导致产出水平和研发支出水平的增加。     

Pollution-reducing innovations under taxes or permits

This paper compares the effects of effluent taxes and pollutionpermits when a pollution-reducing innovation is in prospect.If the government can adjust the level of taxes and permitsafter the innovation has occurred, taxes and permits are fullyequivalent. The equivalence breaks down, however, when the governmentcan pre-commit. In this case, taxes give a higher incentiveto invest in R&D than permits when the post-innovation outputlevel is sufficiently high. The welfare ranking of taxes andpermits is then analyzed. Loosely speaking, taxes are superiorwhen the social damage associated with pollution is not toohigh.     

Fiscal spending and air pollution in Chinese cities: Identifying composition and technique effects

Fiscal spending has both direct and indirect impact on the environment. Using city-level data in China, this paper investigates if education spending affects air pollution through human capital accumulation, known as the composition effect, and if R&D spending affects air pollution through clean-technology adoption, known as the technique effect. Contrasting theoretical predictions and previous empirical evidence, we find both effects of interest to be trivial in urban China. Composition effect appears to be slightly stronger relative to technique effect, while sub-sample analyses show some regional heterogeneities. The results remain robust when we switch between pollution measurements, examine only the regional central cities, instrument endogenous covariates, and adopt the spatial settings. We further discuss potential channel-blocking mechanisms that lead to weak estimates.     

Natural resources and non-cooperative trade policy

When looking at the conditions of trade in natural resources the world appears upside down: tariff protection in natural resources sectors is generally lower than for overall merchandise trade, while export restrictions are twice as likely as in other sectors. On the other hand, tariff escalation is significant in natural resources sectors, where materials in their raw state face, on average, lower duties than in their processed form. In this paper, we discuss how export taxes and tariff escalation may be the result of an uncooperative trade policy. Specifically, tariff escalation and export taxes can be “beggar-thy-neighbor” policies because governments may be tempted to use them to alter the relative price of exports to their advantage (terms-of-trade effect) or to expand the domestic processing industry at the expenses of foreign production (production relocation effect). In equilibrium, these policies offset each other in a Prisoners’ Dilemma situation, where trade is inefficiently low.     

Responsible Behavior of Irresponsible Companies: Air Pollution and Charitable Donations of Polluting Companies

The relationship between air pollution and charitable donations of companies has received little attention from academia. To make up for this defect, we use a regression discontinuity design based on the spatial discontinuity in air pollution created by China's winter heating policy in the north of Qinling Mountains–Huai River line to examine whether severe air pollution may cause polluting companies to make charitable donations. Our results consistently show that air pollution has a positive impact on the donations of polluting companies, regardless of whether the absolute donations, the relative donations, or the willingness to donate are used to measure donations. A series of robustness tests confirm that this relationship is causal. Furthermore, we find that under severe air pollution, the motivations of polluting companies to implement donation behaviors are to decrease the probability of environmental penalties, reduce environmental pollution costs, and decrease the extent to which air pollution affects company reputations.     

Effects of Job Security Laws in a Shirking Model with Heterogeneous Workers

This paper explores the policy implications of job security laws. It extends Carter and De Lancey's (1997) efficiency wage model from the assumption of two types of workers to allow for infinite types of workers. One key difference between the models is that the proportion of nonshirking workers in equilibrium is an exogenous constant in their model, whereas it is an endogenous variable in this study. They find that a job security law increases the welfare of both shirkers and non-shirkers without reducing output. In this setting, it is shown that the law may increase the welfare of both shirkers and nonshirkers at the cost of lower output, or it may result in higher output, but the welfare effect of workers is uncertain.     

Welfare gains from taxation in an open economy: Applied general equilibrium results

This paper uses a general equilibrium trade model with an endogenous labour supply to analyze the effects of changes in domestic taxes. When an open economy has some sectors with scale economies, domestic tax increases may increase social welfare by causing productivity gains which more than compensate for the deadweight welfare loss of taxation.