Little information is available on the impacts of coastal reclamation on wetland loss in large-river deltas at a regional scale.Using remote sensing data of coastal wetland and reclamation in four deltas in China from...Little information is available on the impacts of coastal reclamation on wetland loss in large-river deltas at a regional scale.Using remote sensing data of coastal wetland and reclamation in four deltas in China from 1978 to 2014, we tracked their continuous area changes in four periods: 1978–1990, 1990–2000, 2000–2008, and 2008–2014. The areal relation between wetland loss and reclamation was quantified and used to identify coastal reclamation mode intensity coupled with another three indicators: reclamation rate,accretion rate and land-use intensity of coastal reclamation. The results showed that coastal reclamation driven by economic development reduced, or even reverse the original growth of delta which was determined by the offset between wetland acceleration rate and wetland loss rate. Generally, the area of reclamation showed a positive linear correlation with the area of wetland loss. The findings imply that human activities should control reclamation rate and intensity to alleviate total wetland loss and maintain wetland ’net gain’.Inappropriate coastal reclamation modes can magnify total wetland loss;therefore, coastal reclamation with a slow increment rate and low impervious surface percent is of great importance for sustainable development in future coastal management.展开更多
That SOEs are inefficient is still a consensus in most economic literature. However, in recent studies, more and more arguments are made in favor of the efficiency of SOEs, yet existing empirical studies are mostly ba...That SOEs are inefficient is still a consensus in most economic literature. However, in recent studies, more and more arguments are made in favor of the efficiency of SOEs, yet existing empirical studies are mostly based on production industry data as samples. On the basis of adopting distribution samples and conducting a cross-sector comparison between the production industry and the distribution sector, this paper offers a multi-perspective empirical assessment on the efficiency of SOEs. Through the analysis of major JTnancial indicators and adopting the Data Envelopment Analysis-Malmquist index for total factor productivity comparison, we find that SOEs generally do not have any disadvantage in efficiency and their superior efficiency is particularly pronounced in the distribution sector as compared with production industry. Moreover, the high share and high efficiency of state capital in the wholesale sector needs particular attention. This paper employs case studies to reveal the positive correlation between the assets-heavy operation of state-owned wholesale firms and their profitability. The implications are as follows： policymakers must deliberate prudently before deciding to withdraw or increase state capital in various sectors; in the wholesale sector where state capital is more efficient, the functions of state capital can be bolstered by increasing its presence in the sector,＂ the notion that state capital must be withdrawn from competitive sectors cannot be adopted likely, nor should the benefits of asset-light operation be exaggerated.展开更多
This paper employs a hybrid methodology that combines case study and econometric research to examine the impact of the Internet on domestic market integration. There is not much research on this issue in the literatur...This paper employs a hybrid methodology that combines case study and econometric research to examine the impact of the Internet on domestic market integration. There is not much research on this issue in the literature. From the multi-case analysis, this paper firstly obtains two main indications which are clear yet contrary to each other about how the Internet influences the market integration process. To be specific, although the Internet has both the ability and the potential to promote market integration, it is not always effective and could even harm this process due to several constraints. Using a provincial-level panel dataset from 2007 to 2013 in China, this paper empirically investigates whether the Internet plays a positive role in the market integration process. Contradictory to common expectations, we do not find any empirical evidence that the Intemet accelerates the integration of domestic markets. Thus, when compared with taking advantage of Internet tools, manmade obstacles to market integration that exist in current trading systems and business models deserve more attention.展开更多
基金Under the auspices of the National Key Research and Development Program of China(No.2017YFC0505906)National Natural Science Foundation of China(No.31770576+1 种基金 51639001)Interdiscipline Research Funds of Beijing Normal University
文摘Little information is available on the impacts of coastal reclamation on wetland loss in large-river deltas at a regional scale.Using remote sensing data of coastal wetland and reclamation in four deltas in China from 1978 to 2014, we tracked their continuous area changes in four periods: 1978–1990, 1990–2000, 2000–2008, and 2008–2014. The areal relation between wetland loss and reclamation was quantified and used to identify coastal reclamation mode intensity coupled with another three indicators: reclamation rate,accretion rate and land-use intensity of coastal reclamation. The results showed that coastal reclamation driven by economic development reduced, or even reverse the original growth of delta which was determined by the offset between wetland acceleration rate and wetland loss rate. Generally, the area of reclamation showed a positive linear correlation with the area of wetland loss. The findings imply that human activities should control reclamation rate and intensity to alleviate total wetland loss and maintain wetland ’net gain’.Inappropriate coastal reclamation modes can magnify total wetland loss;therefore, coastal reclamation with a slow increment rate and low impervious surface percent is of great importance for sustainable development in future coastal management.
文摘That SOEs are inefficient is still a consensus in most economic literature. However, in recent studies, more and more arguments are made in favor of the efficiency of SOEs, yet existing empirical studies are mostly based on production industry data as samples. On the basis of adopting distribution samples and conducting a cross-sector comparison between the production industry and the distribution sector, this paper offers a multi-perspective empirical assessment on the efficiency of SOEs. Through the analysis of major JTnancial indicators and adopting the Data Envelopment Analysis-Malmquist index for total factor productivity comparison, we find that SOEs generally do not have any disadvantage in efficiency and their superior efficiency is particularly pronounced in the distribution sector as compared with production industry. Moreover, the high share and high efficiency of state capital in the wholesale sector needs particular attention. This paper employs case studies to reveal the positive correlation between the assets-heavy operation of state-owned wholesale firms and their profitability. The implications are as follows： policymakers must deliberate prudently before deciding to withdraw or increase state capital in various sectors; in the wholesale sector where state capital is more efficient, the functions of state capital can be bolstered by increasing its presence in the sector,＂ the notion that state capital must be withdrawn from competitive sectors cannot be adopted likely, nor should the benefits of asset-light operation be exaggerated.
文摘This paper employs a hybrid methodology that combines case study and econometric research to examine the impact of the Internet on domestic market integration. There is not much research on this issue in the literature. From the multi-case analysis, this paper firstly obtains two main indications which are clear yet contrary to each other about how the Internet influences the market integration process. To be specific, although the Internet has both the ability and the potential to promote market integration, it is not always effective and could even harm this process due to several constraints. Using a provincial-level panel dataset from 2007 to 2013 in China, this paper empirically investigates whether the Internet plays a positive role in the market integration process. Contradictory to common expectations, we do not find any empirical evidence that the Intemet accelerates the integration of domestic markets. Thus, when compared with taking advantage of Internet tools, manmade obstacles to market integration that exist in current trading systems and business models deserve more attention.
