Capital Malleability, Emission Leakage and the Cost of Partial Climate Policies: General Equilibrium Analysis of the European Union Emission Trading System

Computable general equilibrium (CGE) models are the premier analytical platform for assessing the economic impacts of climate change mitigation. But these models tend to treat physical capital as “malleable”, capable of reallocation among sectors over the time-period for which equilibrium is solved. Because the extent to which capital adjustment costs might dampen reallocation is not well understood, there is concern that CGE assessments understate the true costs of greenhouse gas (GHG) reduction policies. This paper uses a multi-region, multi-sector CGE model to investigate cap-and-trade schemes, such as the European Union Emission Trading System which cover a subset of the economy, elucidating the effects of capital malleability on GHG abatement, the potential for emission leakage from abating to non-abating sectors, and the impacts on welfare. To simplify the complex interactions being simulated within the CGE model, that analysis is complemented with an analytical model. A partial climate policy results in negative internal carbon leakage, with emissions declining not only in capped sectors but also in non-regulated ones. This result is stronger when capital is intersectorally mobile. Interestingly, in partial climate policy settings capital malleability can amplify or attenuate welfare losses depending on the attributes of the economy.     

Marginal abatement cost curves in general equilibrium: The influence of world energy prices

Marginal abatement cost curves (MACCs) are a favorite instrument to analyze international emissions trading. This paper focuses on the question of how to define MACCs in a general equilibrium context where the global abatement level influences energy prices and in turn national MACCs. We discuss the mechanisms theoretically and then use the CGE model DART for quantitative simulations. The result is, that changes in energy prices resulting from different global abatement levels do indeed affect national MACCs. Also, we compare different possibilities of defining MACCs—of which some are robust against changes in energy prices while others vary considerably.     

The sensitivity of climate-economy CGE models to energy-related elasticity parameters: Implications for climate policy design

A dynamic climate-economy CGE model based on the GTAP framework is used to analyse how sensitive simulation results are to alternative values assumed by several types of elasticity of substitution in energy-related linkages. Input substitutability in the production function is also tested for the relationship between capital and energy in different manufacturing sectors. The simulation exercise reveals that the model produces highly differentiated results when different sets of elasticity parameters are adopted. As a general result, lower substitutability values correspond to a reduction in the flexibility of energy substitution possibilities, making carbon abatement efforts more expensive. Moreover, this restriction generates changes in the distribution of costs associated with abatement efforts across regions. This brings to severe implications on international competitiveness especially for energy-intensive industrial sectors. The direct implication derived from this work is that in order to use CGE models to assess the amount and distribution of mitigation costs and to inform the international community involved in discussing the feasibility of climate policies, the use of empirically estimated behavioural parameters at the highest possible disaggregation level is highly recommended.     

Growth versus equity: A CGE analysis for effects of factor-biased technical progress on economic growth and employment

With factor-biased technical progress described as labor-saving and skill-biased technical changes, there are concerns that technological innovation can lead to unemployment and widen inequality in the economy. This study explores impacts of factor-biased technical changes on the economic system in terms of economic growth, employment, and distribution, using a computable general equilibrium (CGE) model. The results show that technological innovation contributes to higher level of economic growth with productivity improvements. However, our analysis suggests that economic growth accompanied by skill- and capital-biased technical progress disproportionately increases demand for capital and high-skilled labor over skilled and unskilled labor. This shift in the value-added composition is found to deepen income inequality, as more people in higher income groups benefit from skill premium and capital earnings. Our results suggest that policymakers should prepare a wide range of policy measures, such as reforms in educational programs and taxation systems, in order to ensure sustainable growth.     

燃油税改革对我国节能减排影响的动态CGE研究

2009年1月1日起我国实施成品油税费改革。燃油税是一种经济信号,其变动会引起一个经济体全方位的反应。采用动态CGE模型——MCHUGE模型对燃油税改革对我国节能减排的影响进行仿真研究。研究表明,燃油税改革在短期和长期均能显著降低中国的能源强度,其原因是燃油税改革优化了中国经济的产业结构,第二产业尤其是重工业在GDP中所占比重下降,减少了总体的能源消费。     

Investment behaviour in transition countries and computable general equilibrium models

When applying Computable General Equilibrium (CGE) models to transition economies, it is not plausible to use the standard assumption that the base year data represent stable structural characteristics or even the steady state of the economy. The suggestions forwarded until now to overcome this problem are discussed in this article. An amendment is proposed by modifying the investment modelling within the dynamic CGE setting. The standard formulation of installation costs for capital is extended through the inclusion of adjustment costs that depend on the change of the investment level. Such formulation of the adjustment costs within the dynamic CGE model leads to an investment behaviour that mirrors the empirical data of the first years of the transition.     

Bio-economic modeling of water quality improvements using a dynamic applied general equilibrium approach

An integrated bio-economic model is developed to assess the impacts of pollution reduction policies on water quality and the economy. Emission levels of economic activities to water are determined based on existing environmental accounts. These emission levels are built into a dynamic economic model for the Dutch economy and subsequently coupled to a national water quality model. The modular approach has the advantage that the impacts on the economy and water quality are evaluated simultaneously, but each within their own domain based on the appropriate scale and level of detail. The dynamic nature of the economic model allows us to also evaluate a derogated water policy as foreseen in the European Water Framework Directive. The indirect costs of different water quality improvement policy scenarios are at least as high as the direct costs related to investments in pollution abatement technology. The stricter the policy scenario, the more important the role of economic adjustment and restructuring mechanisms at the macro-economic level. Significant water quality improvements can be achieved through stringent domestic emission reductions. However, reaching water quality standards is highly dependent on water quality improvement policy in surrounding river basin countries and climate change.     

Rational expectations for large CGE models: A practical algorithm and a policy application

We describe a simple iterative method for solving large dynamic CGE models under rational expectations. Details are given for Australia's MONASH model but the approach applies to a wide range of CGE models. The method is automated in the RunMONASH Windows software, putting CGE modelling under rational expectations within the reach of non-specialist modellers. We provide an illustrative application in which MONASH results under rational expectations are compared with results under static expectations. The application and supporting software can be downloaded. Results from the application are interpreted in terms of elementary economic mechanisms.     

You can't have a CGE recession without excess capacity

Simulations with dynamic, single country, CGE models typically imply that reductions in domestic demand, e.g. a cut in investment, generate increases in exports and reductions in imports facilitated by real depreciation. However, currently in the U.S. a large reduction in investment is occurring simultaneously with a contraction in exports and little movement in the real exchange rate. We show that to describe this situation it is necessary to drop the standard CGE assumption that capital is always fully employed in every industry. After introducing an excess capacity specification, we simulate the U.S. recession with and without the Obama stimulus package.     

Optimal Border Policies for Invasive Species Under Asymmetric Information

This paper analyzes the problem faced by a border protection agency if endogenous exporter abatement activities affect invasive species risk, allowing for unobservable differences in abatement cost. We show how the optimal inspection/penalty regime differs from the symmetric information case. Departing from previous literature, we allow for technical assistance, a policy instrument specifically permitted and commonly employed under Article 9 of the World Trade Organization Sanitary and Phytosanitary Agreement. We find the information asymmetry can make it optimal for the importing country to provide technical assistance grants for exporter risk abatement, even if it would otherwise be inefficient. Further, we show that fungibility of technical assistance with inputs in other sectors of the exporting economy affects the qualitative nature of optimal policy. If technical assistance has no outside value in the exporter’s country, optimal policy is characterized by a menu of contracts balancing higher tariffs with lower penalties for being caught with an invasive. If technical assistance can be used in other sectors of the exporter’s economy, it can introduce countervailing incentives making a uniform tariff/penalty combination optimal.     

A model of embodied technical change and employment

A “vintage” framework is described for studying the effects of technical change on economic development, particular attention being given to the level of employment. The framework is based on the notion that investment in new techniques is a major mechanism through which improvements in productivity are obtained. With the specification of demand and investment functions, a simple dynamic model is developed by means of which the effects of both continuous and discontinuous technical changes can be investigated, under various assumptions regarding the response of other economic variables to such changes. It is shown that a variety of behavioral characteristics are produced when technical change does not occur smoothly; in particular, it is suggested that variations in rates of technical change may act as a determinant of fluctuations in other economic variables.     

Anticipated Environmental Policy and Transitional Dynamics in an Endogenous Growth Model

This paper makes a new attempt toinvestigate how an anticipatedenvironmental policy governs the transitionaldynamics of an economy when pollutionexternality is taken into account. Themodeling strategy we use is an AK technologyendogenous growth framework with an endogenousleisure-labor choice. It is found that, unlikeinelastic labor supply framework, a rise inpublic abatement expenditure will stimulate thebalanced economic growth rate. It is alsofound that public abatement technology plays animportant role in determining the transitionaladjustment of the economic growth rate inresponse to a pre-announced environmentalpolicy.     

Climate policy in Western Europe and avoided costs of air pollution control

Abatement of CO₂ emissions will be accompanied by reduced air pollutant emissions such as particulate matter (PM), SO₂, and NO_x. This, in turn, will reduce the need for end of pipe (EOP) pollution control technologies to meet future air quality targets. This dynamic could put more stringent air quality goals within reach, and increase the political feasibility of climate policy. This paper presents a CGE model that has been modified to include the emissions and EOP abatement of PM, SO₂, and NO_x from stationary sources in the EU-17. Emissions of pollutants are modeled as fixed-factor complementary inputs to their associated source. Abatement in each sector is modeled as a substitution between the pollutants and discrete abatement technologies, each of which is sector-specific and characterized by a marginal abatement cost and technical capacity constraint. Scenarios are run to 2020, to assess the costs and co-benefits of simultaneous air quality and climate policies. We find that under the Kyoto Protocol in 2010, the welfare cost of pollution control is reduced by 16% compared to the baseline, effectively offsetting the cost of CO₂ abatement by 15%. The co-benefit results depend heavily on policy choices, and their magnitude relative to total costs is likely to decline as greenhouse targets become more ambitious. In our scenarios, pollution control cost savings range from 1.3 to 20% in 2020, yielding a climate cost offset range of 0.2 to 3.9%. The CO₂ credit imports allowed by the EU via the Clean Development Mechanism (CDM) offer a total savings of $9.7bn in 2020, but only need to be compensated by an additional $0.3–0.4bn in domestic pollution control from stationary sources.     

Validation of an R&D-based computable general equilibrium model

A computable general equilibrium (CGE) model is useful for the calculation of macroeconomic effects caused by policy impacts, but it has been considered a sticking point to evaluate how well the CGE model describes the real economy. Among various possible reasons for the difference between the standard CGE model and the real world, this paper focuses on a limited number of primary input factors and a fixed figure for the calibrated coefficient. A CGE model incorporating research and development (R&D) activity is suggested as an alternative to address the problems with the standard CGE model. The proposed model includes the following two setups: (1) a sector's own knowledge is adopted as a production factor, and (2) others' knowledge is regarded as a source of spillover effect to increase the total factor productivity (TFP) coefficient. This R&D-based CGE model is evaluated on whether its correspondence with reality is better than the standard model that omits the two setups. The two models compute baseline scenarios of South Korean economic growth from 1995 to 2010, and these results are compared to actual data. The results show that the R&D-based model fits better than the standard model in cases where the country has high TFP growth.     

能源税征收的劳动替代效应实证研究--基于上海市2002年大气污染的CGE模型的试算

作为政策分析的有力工具,可计算一般均衡(Computable General Equilibri-um,简称CGE)模型经过40多年的发展已在世界上得到广泛应用,并逐渐发展成为应用经济学的一个分支。目前,我国的CGE模型研究已取得了一些具有开拓性的成果,主要产生了有国务院发展研究中心的DRCCGE和中科院数量经济与技术研究所的PRCGEM两套CGE模型。在这些成果的基础上,文章首先分析了对煤征收能源税的重要性与必要性,随后详细介绍了采用由四大模块组成的CGE模型系统,并且给出了具体的求解处理过程。其次根据2002年上海市投入产出表数据,建立了一个地区性(上海市)可计算一般均衡(CGE)模型,结果表明能源税的征收有效地推动了劳动对能源的替代,促进了经济结构和能源结构的调整,导致大气污染物的减少,同时对实际产出的影响较小,表明对煤征收能源税的可行性和合理性。最后对模型的改进提出了一些建议,为日后地区CGE模型应用及政策分析提供了一些支持。     

Growth, welfare and transitional dynamics in an endogenously growing economy with abatement labor

This paper sets up a simple endogenous growth model that highlights the importance of the endogenous labor-leisure choice and the allocation between production labor and abatement labor. We show that, in contrast to the common notion (e.g. [Bovenberg, A.L., Smulders, S., 1996. Transitional impacts of environmental policy in an endogenous growth model. International Economic Review 37, 861–893] and [Bovenberg, A.L., de Mooij, R.A., 1997. Environmental tax reform and endogenous growth. Journal of Public Economics 63, 207–237]), the existence of an environmental production externality is a sufficient (but not necessary) condition for environmental policies to stimulate economic growth if the labor-leisure choice is endogenously determined. In particular, since there are complementarities between public abatement and private abatement, the public abatement expenditure will have a more powerful enhancing effect on economic growth when it is accompanied by more efficient private abatement. This result also leads to a corollary to the effect that it is easier to achieve double dividends in terms of enhancing both growth and welfare if the endogenous labor-leisure choice is taken into account.In our dynamic analysis, we show that if public abatement is substantially large, dynamic indeterminacy may occur despite the absence of a positive labor externality and interestingly, this is more likely to be the case when abatement labor plays a more significant role. Besides, the transitional effects of an increase in public abatement are also investigated.     

The Innovation‐R&D Nexus in an Emerging Economy: Evidence from the Indian Manufacturing Sector

While R&D is considered an important input for innovation, its relationship with the output of the innovation process continues to remain enigmatic, especially in developing countries with low levels of domestic research. Using patents and knowledge capital stock as proxies for the output and input of the innovation process, we study their nexus in the emerging economy of India using a large sample of manufacturing firms over the period 2001–2010. Using a specification that addresses the problem of ‘excess zeroes’ in count data, the firm's non‐technical knowledge stock as an additional factor of the success with which R&D transforms into patents, and a linear feedback mechanism that yields consistent estimators, we find that a one unit increase in knowledge capital likely raises expected patent count by only about 4.3% at most. Further, although patenting experience, resource access and knowledge spillovers are strongly significant in explaining patent counts, the magnitude of these effects is marginal at best. In brief, evidence for the knowledge production function is rather weak even in the context of a dynamic developing economy.     

金融危机下中国经济系统的内外部冲击影响——基于虚实两部门一般均衡模型的研究及模拟测算

国际金融危机下的石油价格波动、财政金融政策、结构和技术变化等内外部冲击对中国经济系统的影响越来越受到政府部门和中外学者的密切关注.为了能从数量上把握冲击的直接和间接效果,文章基于一个实物部门与金融部门相统合的金融可计算一般均衡(CGE)模型,运用比较静态和比较动态的方法定量分析它们对中国经济的影响,并据模拟结果给出相关政策含义,从而为政策制定提供更充分的理论依据.     

International transatlantic trade liberalization: zooming in on regional impacts

The current study analyses the impact on a Portuguese small island regional economy of the Transatlantic Trade and Investment Partnership (T-TIP) between the EU and the USA. A dynamic Computational General Equilibrium (CGE) model detailing six household categories, 45 sectors, and four trading partners is used. Previous studies used aggregate variables and, largely, were based on the structure of the national economy. For a small, integrated economy, foreign trade statistics comprise an underestimation, given that most of the trade occurs through national logistics centres. Taking into account the national integration effects, gross domestic value was estimated to be higher than in other studies. Using equivalent variation, the estimated welfare impact is positive for all six household categories. Value-added suffers mixed impacts depending on the sector. It is negative for fisheries, ambiguous for agriculture and positive for tourism and transportation. The contribution of the current study is to highlight the importance of looking beneath the trade block and national conclusions particularly when regional economic policy is relevant as is the case in Europe. Better knowledge of welfare, regional and sector impacts allows for improved development and mitigation policies.     

数字经济促进全要素生产率提升的效应评价

数字经济的发展为我国转变发展方式、实现经济高质量发现提供了新的契机。在此背景下,采用面板数据模型估计了数字经济对我国地区全要素生产率的影响,并进一步将全要素生产率分解为技术进步和技术效率,探讨数字经济对全要素生产率的影响机制。结果发现：首先,数字经济整体上可以促进全要素生产率进步,且在进行内生性处理和稳健性检验后,这一结论依然较为稳健。其次,从全要素构成来看,数字经济促进技术效率提升在全要素生产率进步中发挥了主要作用,无论对于技术效率低的地区还是技术效率高的地区,数字经济均能促进其技术效率提升。最后,数字经济整体上对技术进步的影响则不显著,只有技术进步本身较高的地区才能充分利用数字经济带来的优势,进一步提高技术水平。