On the North-South trade in the Americas and its ecological asymmetries

There has been a long and intensive debate within the scientific community about the role of international trade in the development of countries. During the last decades, the focus of attention has moved from the pure economic level to the environmental aspects of international trade. Establishing a simplified system of North-South trade for one reference period (2003), this paper attempts to test empirically the extent of potential asymmetries with regard to extracted material flows, and contrasts the results with the economic benefits from trade (in terms of value-added). The South is thereby represented by a selection of Latin American countries (Brazil, Chile, Colombia, Ecuador and Mexico), the North comprises one of their main commercial partners, the United States. At the methodological level, a multi-regional input-output analysis is used as the tool of investigation. Results generally support the hypothesis that the South was feeding the North's societal metabolism. South-North material exports were 1.6 times larger than North-South material exports, resulting in a net deficit for the South of 324 million tons. Moreover, material intensity of exported commodities from the South was twice as high as that from the North. It is worth highlighting, however, that part of the North-South hypothesis fails for the sample of countries since the larger part of the economic surplus has remained in the South, contrarily to what would have been expected.     

MFA model to assess economic and environmental consequences of food production and consumption

Agri-food sector is a crucially important part of the society, because it is a major factor affecting public health and welfare and it also contributes – directly and indirectly – both to the environment and to the national gross product and employment. Improving sustainability of the agri-food sector implies production of nutritionally better food by using fewer inputs and by reducing environmental burden.In reducing environmental burden, it is essential to restrict the material throughput, to identify the hot spots and direct the measures to them. Improving performance of the food sector requires that the benefits and inputs be quantified in an unambiguous way and that the inputs are estimated for the whole production chain. A comprehensive view of the whole system is necessary.Here, the material flow approach (MFA) has been used to describe the Finnish food flux. The quantitative numerical data have been derived from the farm models' data base, and the data have been adjusted so as to comply with the production and consumption statistics of Finland. Using the compiled data an extended input–output model has been constructed. The model allows for the evaluation of some of the economic and environmental consequences, when the structure of food production and the patterns of food consumption are changed. The consequences can be traced within agriculture, within the food sector as a whole, or at the level of the nation-wide economy. In combination with other information the model, thus, serves as a practical tool for planning.The paper at hand gives an overview of the data base and the basic calculation principles of the model. The usability of the model is demonstrated with results from modelling examples, in which the share of organic production or the share of vegetarian food in the average Finnish diet has been increased. The possibilities and restrictions of the approach as well as some of the needs for further development are discussed.The study is the first step in developing MFA methods to analyse and to monitor the material flows of the Finnish food flux. The results have been used also in compiling the Finnish physical input–output tables. The study, thus, contributes to the overall development of the materials flow accounting.     

Structural decomposition analysis and input-output subsystems: Changes in CO2 emissions of Spanish service sectors (2000-2005)

The analysis of gas emissions by an input-output subsystem approach provides detailed insight into pollution generation in an economy. Structural decomposition analysis, on the other hand, identifies the factors behind the changes in key variables over time. Extending the input-output subsystem model to account for the changes in these variables reveals the channels by which environmental burdens are caused and transmitted throughout the production system. In this paper we propose a decomposition of the changes in the components of CO₂ emissions captured by an input-output subsystems representation. The empirical application is for the Spanish service sector, and the economic and environmental data are for years 2000 and 2005. Our results show that services increased their CO₂ emissions mainly because of a rise in the emissions generated by non-services to cover the final demand for services. The decomposed effects show a decrease in CO₂ emissions due to technological changes between 2000 and 2005 compensated by an increase in emissions caused by the rise in final demand of services. Finally, large asymmetries exist not only in the quantitative changes in the CO₂ emissions of the various services but also in the decomposed effects of these changes.     

The material basis of the global economy: Worldwide patterns of natural resource extraction and their implications for sustainable resource use policies

Material flow accounting and analysis (MFA) has been established as an influential framework for quantifying the use of natural resources by modern societies. So far, however, no reference data for overall scale and trends of global extraction of natural resources and their distribution between different world regions has been available. This paper presents the first comprehensive quantification of the material basis of the global economy, i.e. used domestic extraction in a time series from 1980 to 2002. We analyse time trends for major material groups (fossil fuels, metals, industrial and construction minerals, and biomass) disaggregated into seven world regions. This allows for (a) an illustration of the global economy's physical growth driven by worldwide processes of economic integration over the past decades, and (b) an indication of the worldwide distribution of environmental pressures associated with material extraction. The results show that annual resource consumption of the world economy increased by about one third between 1980 and 2002. This indicates that scale effects due to economic growth more than compensated for other effects, such as the relative increase of the service sectors' contribution to GDP (structural effect) and the use of new production technologies with higher material and energy efficiency (technology effect). The observed growth of natural resource extraction is unevenly distributed over the main material categories, with metals showing the highest growth rate. The regional analysis shows the increasing importance of Asia and Latin America in global resource extraction. On the global level, material intensity, i.e. resource extraction per unit of GDP, decreased by about 25%, indicating relative decoupling of resource extraction from economic growth. The paper concludes with policy recommendations for a more sustainable use of natural resources.     

Analysis of changes in Dutch emission trade balance(s) between 1996 and 2007

In this paper we construct bilateral emission trade balances (ETB) for The Netherlands with 17 regions and compare results for 1996 and 2007 for three different greenhouse gasses. We establish a cross-sectional analysis of bilateral ETBs into a volume of trade, composition and technology effect. In order to analyze the driving forces of changes over time we perform a structural decomposition analysis of embodied import and export emissions. The main findings are that the embodied import emissions have increased by 37% whereas export emissions increased by only 3%, which is primarily driven by CO₂. The 2007 bilateral balances are positive with OECD countries but negative with economies such as Russia, Africa and China. The analyses demonstrate that the worsening of the ETB is to a large extent caused by the changing composition of trade: the Dutch economy increasingly exports clean products and imports dirty products.     

揭示"制度与增长关系之谜"的一个研究视角——基于中国经济转型与经济增长关系的实证研究(1978-2004)

本文通过对中国经济转型与经济增长之间的实证研究,发现经济增长是直接推动经济体制转型深化的内在动力,而经济转型虽然对经济增长有长期的影响作用,但这种作用却不是决定性的.在制度与增长二者关系中,制度虽然是影响增长的长期重要因素,但这种影响却不是决定性的;而恰恰相反,增长对制度的影响却是决定性的.这说明制度创新在增长的大背景中更易达到,而中国改革成功的经验也充分证明了这一点.