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1.
Soil biota, ecosystem services and land productivity   总被引:6,自引:0,他引:6  
The soil environment is likely the most complex biological community. Soil organisms are extremely diverse and contribute to a wide range of ecosystem services that are essential to the sustainable function of natural and managed ecosystems. The soil organism community can have direct and indirect impacts on land productivity. Direct impacts are those where specific organisms affect crop yield immediately. Indirect effects include those provided by soil organisms participating in carbon and nutrient cycles, soil structure modification and food web interactions that generate ecosystem services that ultimately affect productivity. Recognizing the great biological and functional diversity in the soil and the complexity of ecological interactions it becomes necessary to focus in this paper on soil biota that have a strong linkage to functions which underpin ‘soil based’ ecosystem services. Selected organisms from different functional groups (i.e. microsymbionts, decomposers, elemental transformers, soil ecosystem engineers, soil-borne pest and diseases, and microregulators) are used to illustrate the linkages of soil biota and ecosystem services essential to life on earth as well as with those associated with the provision of goods and the regulation of ecosystem processes. These services are not only essential to ecosystem function but also a critical resource for the sustainable management of agricultural ecosystems. Research opportunities and gaps related to methodological, experimental and conceptual approaches that may be helpful to address the challenge of linking soil biodiversity and function to the provision of ecosystem services and land productivity are discussed. These include: 1) integration of spatial variability research in soil ecology and a focus on ‘hot spots’ of biological activity, 2) using a selective functional group approach to study soil biota and function, 3) combining new and existing methodological approaches that link selected soil organisms, the temporal and spatial dynamics of their function, and their contribution to the provision of selected ‘soil based' ecosystem services, 4) using understanding about hierarchical relationships to manage soil biota and function in cropping systems, 5) using local knowledge about plants as indicators of soil quality, remote sensing and GIS technologies, and plant-soil biota interactions to help understand the impacts of soil biota at landscape scale, and 6) developing land quality monitoring systems that inform land users about their land's ecosystem service performance, improve capacities to predict and adapt to environmental changes, and support policy and decision-making.  相似文献   

2.
Labor productivity in the U.S. copper mining industry tripled between 1975 and 1995, allowing the industry to recover its comparative advantage. Mine level data on output and labor input indicate that over three-quarters of this increase came from labor productivity growth at individual mines, and less than a quarter from shifts in output from low- to high-productivity mines. This finding supports the hypothesis that new technology and innovation are as important or more important than mineral endowment in shaping labor productivity trends and comparative advantage in mining.  相似文献   

3.
《European Economic Review》2001,45(4-6):847-859
Economic growth since 1965 has varied inversely with the share of natural capital in national wealth across countries. Four main channels of transmission from abundant natural resources to stunted economic development are discussed: (a) the Dutch disease, (b) rent seeking, (c) overconfidence, and (d) neglect of education. Public expenditure on education relative to national income, expected years of schooling for girls, and gross secondary-school enrolment are all shown to be inversely related to the share of natural capital in national wealth across countries. Natural capital appears to crowd out human capital, thereby slowing down the pace of economic development.  相似文献   

4.
5.
In the standard trust game the surplus is increased by the risk taking first mover while cooperation by the second mover is a one-to-one transfer. This paper reports results from experiments in which the reverse holds; the first mover’s risky trust is not productive and the second mover’s cooperation is productive. This subtle difference significantly lowers the likelihood of trust but increases the likelihood of cooperation conditional on trust. Evidence is presented that the change in trust is consistent with first movers failing to anticipate the later result. Drawing upon the analogy that the trust game represents a model of exchange, the results suggest that markets should be organized so that the buyer moves first and not the seller as in the original trust game.
Electronic Supplementary Material  The online version of this article () contains supplementary material, which is available to authorized users.   相似文献   

6.
While the direct impact of geographic endowments on prosperity is present in all countries, in former colonies, geography has also affected colonization policies and, therefore, institutional outcomes. Using non-colonized countries as a control group, I re-examine the theories put forward by La Porta et al. (J Law Econ Org 15(1):222–279, 1999 and Acemoglu et al. (Am Econ Rev 91(5), 1369–1401, 2001. I find strong support for both theories, but also evidence that the authors’ estimates of the impact of colonization on institutions and growth are biased, since they confound the effect of the historical determinants of institutions with the direct impact of geographic endowments on development. In a baseline estimation, I find that the approach of Acemoglu et al. (2001) overestimates the importance of institutions for economic growth by 28 %, as a country’s natural disease environment affected settler mortality during colonization and also has a direct impact on prosperity. The approach of La Porta et al. (1999) underestimates the importance of colonization-imposed legal origin for institutional development by 63 %, as Britain tended to colonize countries that are remote from Europe and thus suffer from low access to international markets.  相似文献   

7.
During the last decade, economists and policy makers have extensively discussed what types of firms can exploit external markets by exporting and what happens to domestic firms if external competitors penetrate into the home market. Although both theoretical and empirical studies have been dedicated to these issues, few have been carried out for the service sector. Since the service sector accounts for the lion’s share of GDP, the lack of those studies indicates that a large part of the actual economy still remains veiled. Our study fills this gap. We examine whether or not the Melitz and Ottaviano (2008) model remains satisfied in the service sector, using data from Japanese SMEs. From our analysis, we confirm that larger market sizes are associated with higher productivity levels. On the other hand, firms with higher markups tend to develop their business in smaller markets, conditional of the simultaneity between production and consumption. These results reveal that further productivity growth in the service sector also requires markets to be larger and more integrated. In addition, the markup levels become lower in those markets.  相似文献   

8.
The global financial and economic crisis has prompted some scholars to suggest that a fundamental regulatory shift away from neoliberalism will take place – both in general and in the field of EU competition regulation. This paper shows that so far no radical break with the neoliberal type of competition regulation is heaving into sight. It sets out to explain this from the vantage point of a critical political economy perspective, which identifies the circumstances under which a crisis can result in a regulatory paradigm shift. Contrasting the current situation with the shift in EC/EU competition regulation after the crisis in the 1970s, the paper argues that the preconditions for a fundamental shift in this issue area are not present this time around. Several reasons account for this: the current crisis has been construed by economic and political elites as a crisis within and not of neoliberal capitalism; the social power configuration underpinning the neoliberal order remains unaltered; no clear counter-project has surfaced; the European Commission has been (and remains) in a position to oppose radical changes; and finally, there are no signs of a wider paradigm shift in the EU's regulatory architecture.  相似文献   

9.
The economic growth and development literature emphasizes that investment in technology and physical and human capital is essential for achieving higher levels of development. Political and economic institutions are also relevant in this process. With a sample of 5,503 Brazilian municipalities, this study carries out a development accounting exercise and measures the effects of institutional quality on per capita gross domestic product (GDP), physical capital intensity, human capital stock, and productivity. The empirical results indicate that institutional quality affects GDP per capita mainly through human capital accumulation and total factor productivity.  相似文献   

10.
This paper uses the case of Italy to investigate the effects of local financial and socio-institutional development on productivity. The analysis employs firm-level productivity data and exploits variations in banking sector development, judicial enforcement, and social capital across Italian provinces. After controlling for potential endogeneity, our empirical results suggest that the real effects of financial development are conditional on the quality of the socio-institutional environment. In particular, we find that the positive effects of greater financial depth on productivity are stronger when the socio-institutional environment is sufficiently developed. Therefore, to exploit potential productivity gains stimulated by financial development, it is necessary to achieve a higher-quality socio-institutional environment, including reducing the duration of civil trials.  相似文献   

11.
程凌燕 《时代经贸》2008,6(8):27-28
面对高等教育的国际化,地方高校应高度重视并积极开展中外合作办学.尤其是河南省,又好又多的生源因缺乏更多本土优质高校的支撑,最终不少人只能与理想中的大学失之交臂.本文将运用CPM分析,探讨河南高校中外合作办学的发展策略,找准中外合作办学的定位.  相似文献   

12.
The use of forests as natural carbon capture and storage sinks is considered by introducing carbon sequestration benefits’ accounting in a multi-vintage partial equilibrium land-use model, under different carbon price scenarios. The consequences to timber and land markets and to the profile of the carbon sequestration time path are examined in the short-run, long-run, and transition. Following IPCC, three carbon accounting methods are considered: the carbon flow, the ton-year crediting and the average storage. A full proof of long-run optimality of steady-state forest is provided. Numerical simulations are performed and results discussed illustrating the setup's potential.  相似文献   

13.
This paper studies the relationship between transparency on the consumer side and productivity of firms. We show that more transparent markets are characterized by higher average productivity as firms with low productivity abstain from entering these markets.  相似文献   

14.
To investigate whether rent-seeking discourages productivity, we consider a third-market model, in which a domestic firm and a foreign firm engage in both Research and Development (R&D) and output competition. We show that the relationship between rent-seeking and productivity depends on two forces. On the one hand, rent-seeking increases the marginal benefit of R&D and encourages productivity. On the other hand, a lower production cost due to R&D enables the government to extract the rent from the firm to a greater extent and discourages the productivity. Which force is dominant depends on the level of corruption or, as an alternative interpretation, the weight the government attaches to political contributions. Unlike the monotonic relationship proposed by the literature, we find a non-monotonic relationship between rent-seeking and productivity.  相似文献   

15.
The on-coming age of changing technology and knowledge intensification, and its interactions with human values are expected to bring forth fundamental shifts in socioeconomic environment. The paper presents an overview of the dynamics of technological change, a hypothesis on productivity dynamics, and likely shifts in organizational structure. To cope with changes, organizational productivity has to be increasingly governed by human creativity and managerial effectiveness. The structure will be flatter, action-oriented, entrepreneurial, and, above all, flexible. By being organically alive, it will be different from conventional mechanical setups. The future will witness more of flexible manufacturing and flexible management systems and a change of emphasis from “management of technology” to “management of change”, governed by a multiperspective vision. The paper also analyzes major problems likely to be faced by developing countries in getting prepared for the future. In addition to their current focus on technological aspects, the Third World countries have to be seriously concerned about people and organizational issues.  相似文献   

16.
We investigate the drivers of firm‐level productivity in catching‐up economies by jointly estimating its relationship to innovation and competition using data from the EBRD‐WB Business Environment and Enterprise Performance Survey (BEEPS) in Eastern Europe and Central Asia. The findings confirm an inverted‐U shaped impact of competition on R&D. Both competition and innovation have a simultaneous positive effect on labour productivity in terms of either sales or value added per employee, as does a high share of university graduates and foreign ownership. Further positive impacts come from firm size, exports or population density. Innovation and foreign ownership appear to be the strongest drivers of multifactor productivity.  相似文献   

17.
Exporting, productivity and agglomeration   总被引:4,自引:0,他引:4  
Economic analysis of adjustment to globalisation has shifted from countries and industries to firms and plants. One particularly fruitful area for research has been aspects of entry to, participation in and exit from export markets. This paper contributes to that literature. Its focus is the exporting behaviour of manufacturing firms in the United Kingdom. To isolate the impact of participation in export markets we use nearest neighbour matching. For 1988-2002, we find evidence that spillovers associated with agglomeration can raise the probability of export market entry and once entry has occurred there may be additional productivity benefits. Survival is driven partly by size and total factor productivity and partly by industry characteristics.  相似文献   

18.
A decomposition of aggregate productivity growth of German manufacturing firms that pertain to 11 different industries at a roughly two-digit level observed over the period 1981–1998 is performed. Productivity is measured by a nonparametric frontier function approach. The decompositions of productivity allow for an explanation of the aggregate outcomes by the quantification of the effect of structural change and the contributions of entering and exiting firms. Our results show that these forces drive aggregate productivity to a considerable extent. Remarkably, the large productivity improvements after the German reunification are mainly driven by structural change.
Jens J. KrügerEmail:
  相似文献   

19.
周在泉 《时代经贸》2007,5(7Z):107-109
武汉市在全国的经济地位正像中国在世界的经济地位一样,可称为发展中的城市。本文论述了武汉市在经济发展中应该采取的战略举措:从发展导向看,应以建立外向型城市为目标;从城市空间发展来看,走板块扩张的方式;从壮大经济实力的突破口来看,应积极吸纳国际制造业转移。对于如何实现战略,本文提出了一些新的思路。  相似文献   

20.
周在泉 《时代经贸》2007,5(7):107-109
武汉市在全国的经济地位正像中国在世界的经济地位一样,可称为发展中的城市.本文论述了武汉市在经济发展中应该采取的战略举措从发展导向看,应以建立外向型城市为目标;从城市空间发展来看,走板块扩张的方式;从壮大经济实力的突破口来看,应积极吸纳国际制造业转移.对于如何实现战略,本文提出了一些新的思路.  相似文献   

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