China’s hog sector is undergoing the shift from family farming system to commercialized intensive production. The empirical analysis indicates that middle-size hog farms (100
{"title":"Structural Changes of Hog Farming in China: Good or Bad? A Case Study of Wuxue City in Hubei Province","authors":"Liange Zhao, Hong-yun Han","doi":"10.22004/AG.ECON.253674","DOIUrl":"https://doi.org/10.22004/AG.ECON.253674","url":null,"abstract":"China’s hog sector is undergoing the shift from family farming system to commercialized intensive production. The empirical analysis indicates that middle-size hog farms (100<Q≤1000) have outperformed other hog farms in the pursuit of environmental conservation and economic efficiency; however, 45.5% of sampled hog farms are small farms with less than 100 head. To achieve the win-win situation of economic efficiency and environmental conservation, it is critical for the Chinese government to facilitate the evolution of structural changes of small hog farms via contracting production, specialization of the piglets, and establishment of association of hog farming.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"1 1","pages":"25-42"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74814430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Mariani, F. Napoletano, E. Pomarici, R. Vecchio
In the past, international wine trade experienced a significant increase mainly due to the growth in demand in northern Europe and the USA. Since the beginning of the new millennium, new import markets are developing, where market access is hampered by tariff and non-tariff barriers. As a result of this change, the problem of trade barriers and their phasing out takes on a new centrality. The objective of this paper is to analyse trade barriers and to discuss the new path of trade liberalization process. The paper first provides an overview of main trends in wine international trade and of tariff and non-tariff barriers. Subsequently, it offers an analysis of the main initiatives designed to lower trade barriers, depicting the results achieved by the World Wine Trade Group (WWTG) and preferential trade agreements (PTAs) signed by the main wine exporters. Thirdly, it presents a reclassification of exports allowing a quantitative assessment of the flows more at risk of being hindered by trade barriers, considering trade within Regional Integrated Areas and within the WWTG countries. Compared with the importance of the topic, literature on tariff and non-tariff barriers to wine trade is still quite limited. The current work intends to contribute to a better comprehension of the global situation by framing the issues in a qualitative and quantitative matter. Results may be useful as a basis for policy makers and traders, and foster further academic investigations.
{"title":"Tariff and Non-Tariff Barriers to Wine Exports and Initiatives to Reduce their Effects","authors":"A. Mariani, F. Napoletano, E. Pomarici, R. Vecchio","doi":"10.22004/AG.ECON.253673","DOIUrl":"https://doi.org/10.22004/AG.ECON.253673","url":null,"abstract":"In the past, international wine trade experienced a significant increase mainly due to the growth in demand in northern Europe and the USA. Since the beginning of the new millennium, new import markets are developing, where market access is hampered by tariff and non-tariff barriers. As a result of this change, the problem of trade barriers and their phasing out takes on a new centrality. The objective of this paper is to analyse trade barriers and to discuss the new path of trade liberalization process. The paper first provides an overview of main trends in wine international trade and of tariff and non-tariff barriers. Subsequently, it offers an analysis of the main initiatives designed to lower trade barriers, depicting the results achieved by the World Wine Trade Group (WWTG) and preferential trade agreements (PTAs) signed by the main wine exporters. Thirdly, it presents a reclassification of exports allowing a quantitative assessment of the flows more at risk of being hindered by trade barriers, considering trade within Regional Integrated Areas and within the WWTG countries. Compared with the importance of the topic, literature on tariff and non-tariff barriers to wine trade is still quite limited. The current work intends to contribute to a better comprehension of the global situation by framing the issues in a qualitative and quantitative matter. Results may be useful as a basis for policy makers and traders, and foster further academic investigations.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"169 1","pages":"5-24"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84792937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Given the regional dimension has become an extremely widespread concern in recent investigations of agro-food economics, this study aims at detecting extra-virgin olive oil's main attributes through a qualitative analysis of consumer behaviour in Sicily and in some Italian metropolitan areas (Rome and Milan), in order to identify the main variables that affect local with respect to regional production. The paper's aim is to inform olive oil stakeholders about consumer preferences regarding extra-virgin olive oil attributes, that include area of origin, geographical designation (PDO and PGI), organic certification and price. The aforementioned attributes constitute an additional factor of overall perceived quality, and verify if the perception of quality varies among consumers in different geographic areas. Findings emphasise the leading role that price plays and highlights how Italian olive oil consumers are positively influenced by an organic method of production and PDO certification. Furthermore, consumers from traditional olive oil production areas tend to identify their local extra-virgin olive oil as superior to others. Consumers from areas not traditionally olive oil producers consider price to be an indicator of quality and often purchase more expensive extra-virgin olive oil.
{"title":"Quality perception of PDO extra-virgin olive oil: which attributes most influence Italian consumers?","authors":"G. Vita, M. D’Amico, G. L. Via, E. Caniglia","doi":"10.22004/AG.ECON.253544","DOIUrl":"https://doi.org/10.22004/AG.ECON.253544","url":null,"abstract":"Given the regional dimension has become an extremely widespread concern in recent investigations of agro-food economics, this study aims at detecting extra-virgin olive oil's main attributes through a qualitative analysis of consumer behaviour in Sicily and in some Italian metropolitan areas (Rome and Milan), in order to identify the main variables that affect local with respect to regional production. The paper's aim is to inform olive oil stakeholders about consumer preferences regarding extra-virgin olive oil attributes, that include area of origin, geographical designation (PDO and PGI), organic certification and price. The aforementioned attributes constitute an additional factor of overall perceived quality, and verify if the perception of quality varies among consumers in different geographic areas. Findings emphasise the leading role that price plays and highlights how Italian olive oil consumers are positively influenced by an organic method of production and PDO certification. Furthermore, consumers from traditional olive oil production areas tend to identify their local extra-virgin olive oil as superior to others. Consumers from areas not traditionally olive oil producers consider price to be an indicator of quality and often purchase more expensive extra-virgin olive oil.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"1 1","pages":"46-58"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83133230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The objective of this paper is to measure the efficiency and the productivity change of Greek dairy firms, using non parametric approaches. This assessment is being achieved by the computation of the CRS and the VRS DEA models, the context dependent DEA approach and finally, the evolution of the Malmquist productivity index. These empirical analyses are based on data from 29 Greek dairy firms. This implementation provided helpful information regarding the efficiency ranking of the firms that operate in the Greek dairy industry. Findings that inefficient firms are over-invested and overexposed to high risk operation practices provide suggestions for future reparative actions in order to improve efficiency. This goal does not require radial effort from firms to achieve intermediate targets. Finally, stagnated mean efficiency change does not imply stagnated efficiency change for individual firms, but it is the outcome of a large variance of efficiency change scores being achieved by dairy firms from period to period.
{"title":"Efficiency and Productivity Change in the Greek Dairy Industry","authors":"G. Vlontzos, A. Theodoridis","doi":"10.22004/AG.ECON.253542","DOIUrl":"https://doi.org/10.22004/AG.ECON.253542","url":null,"abstract":"The objective of this paper is to measure the efficiency and the productivity change of Greek dairy firms, using non parametric approaches. This assessment is being achieved by the computation of the CRS and the VRS DEA models, the context dependent DEA approach and finally, the evolution of the Malmquist productivity index. These empirical analyses are based on data from 29 Greek dairy firms. This implementation provided helpful information regarding the efficiency ranking of the firms that operate in the Greek dairy industry. Findings that inefficient firms are over-invested and overexposed to high risk operation practices provide suggestions for future reparative actions in order to improve efficiency. This goal does not require radial effort from firms to achieve intermediate targets. Finally, stagnated mean efficiency change does not imply stagnated efficiency change for individual firms, but it is the outcome of a large variance of efficiency change scores being achieved by dairy firms from period to period.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"169 1","pages":"14-28"},"PeriodicalIF":0.0,"publicationDate":"2013-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73710325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Allowing for the comparison of agricultural policies among countries and supporting the European integration process, a methodological tool was developed called the APM (Agri-Policy Measures tool). The tool enables the cross country qualitative and quantitative analysis of budgetary support to agriculture using uniform classification and systemization template primarily based on the current EU concept of the policy pillars. All agricultural policy measures are grounded on three main pillars: market and direct producer support measures, structural and rural development measures and general measures related to agriculture. Total budgetary support to agriculture should represent the sum of all transfers related to agriculture from all sources, but without administrative costs and transfers to non-agricultural sectors. The tool was applied for the analysis and comparison of agricultural policies in the Western Balkan countries and it proved to be useful for policy analysis in relation to the EU accession process.
{"title":"A tool for uniform classification and analyses of budgetary support to agriculture for the EU accession countries","authors":"M. Rednak, T. Volk, E. Erjavec","doi":"10.22004/AG.ECON.253539","DOIUrl":"https://doi.org/10.22004/AG.ECON.253539","url":null,"abstract":"Allowing for the comparison of agricultural policies among countries and supporting the European integration process, a methodological tool was developed called the APM (Agri-Policy Measures tool). The tool enables the cross country qualitative and quantitative analysis of budgetary support to agriculture using uniform classification and systemization template primarily based on the current EU concept of the policy pillars. All agricultural policy measures are grounded on three main pillars: market and direct producer support measures, structural and rural development measures and general measures related to agriculture. Total budgetary support to agriculture should represent the sum of all transfers related to agriculture from all sources, but without administrative costs and transfers to non-agricultural sectors. The tool was applied for the analysis and comparison of agricultural policies in the Western Balkan countries and it proved to be useful for policy analysis in relation to the EU accession process.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"7 1","pages":"76-96"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90073553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper compares the sensitivity of US cotton exports to the bilateral exchange rate for three Asian textile producers with a long series of yearly data from 1978 to 2010. The model of the cotton market includes an alternate supply, US production cost, and local mill use. Effects of each bilateral exchange rate vary considerably across these countries. Aggregation and the related trade weighted exchange rate lead to misleading results. Changes in the rate of depreciation have more robust effects than depreciation, suggesting a wealth effect on cash balance.
{"title":"US Cotton Exports and Bilateral Exchange Rates","authors":"Nazif Durmaz, H. Thompson","doi":"10.22004/AG.ECON.253534","DOIUrl":"https://doi.org/10.22004/AG.ECON.253534","url":null,"abstract":"This paper compares the sensitivity of US cotton exports to the bilateral exchange rate for three Asian textile producers with a long series of yearly data from 1978 to 2010. The model of the cotton market includes an alternate supply, US production cost, and local mill use. Effects of each bilateral exchange rate vary considerably across these countries. Aggregation and the related trade weighted exchange rate lead to misleading results. Changes in the rate of depreciation have more robust effects than depreciation, suggesting a wealth effect on cash balance.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"6 1","pages":"5-15"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75324602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the past few years, Europe has experienced an increase in several chronic diseases linked to dietary and lifestyle factors. In particular obesity is increasing at an alarming rate all over Europe, while warnings about it have intensified. As result nutritionrelated measures are ranking as first in the agenda of the EU political priorities. Particularly at the end of 2011 the EU introduced new rules on food labeling requirement by inserting a nutritional declaration. In this context the proposed paper aims to explore factors affecting use and understanding of nutrition information on food labels in Italy to provide useful guidance in the implementation of new nutrition labelling. The study presents some results of a direct survey on a sample of 400 consumers and provides a market segmentation identifying different profiles of consumers, through the use of PCA and Cluster Analysis. The results obtained from this analysis suggest the need to focus mainly on education campaigns and providing several indications for developers and marketers as well as government bodies that are interested in designing consumer communication strategies and effective health programs.
{"title":"Factors affecting use and understanding of nutrition information on food labels: evidences from customers","authors":"Azzurra Annunziata, R. Vecchio","doi":"10.22004/AG.ECON.253513","DOIUrl":"https://doi.org/10.22004/AG.ECON.253513","url":null,"abstract":"In the past few years, Europe has experienced an increase in several chronic diseases linked to dietary and lifestyle factors. In particular obesity is increasing at an alarming rate all over Europe, while warnings about it have intensified. As result nutritionrelated measures are ranking as first in the agenda of the EU political priorities. Particularly at the end of 2011 the EU introduced new rules on food labeling requirement by inserting a nutritional declaration. In this context the proposed paper aims to explore factors affecting use and understanding of nutrition information on food labels in Italy to provide useful guidance in the implementation of new nutrition labelling. The study presents some results of a direct survey on a sample of 400 consumers and provides a market segmentation identifying different profiles of consumers, through the use of PCA and Cluster Analysis. The results obtained from this analysis suggest the need to focus mainly on education campaigns and providing several indications for developers and marketers as well as government bodies that are interested in designing consumer communication strategies and effective health programs.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"20 1","pages":"103-116"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81871526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The impact of EU agricultural support policies on farms’ economic performance is an interesting issue for policy makers. The objective of this paper is to investigate technical efficiency and technical efficiency change of specialized German, Dutch and Swedish dairy farms and to compare their relative productivity. Three subsidy-related variables are introduced to reflect the wealth and insurance effect and the coupling effect of Common Agricultural Policy (CAP) subsidies. Our results imply that a higher degree of coupling in farm support negatively affects farm efficiency, and the motivation of farmers to work efficiently is lower when they depend to a higher degree on subsidies as a source of income. Our study indicates that the composition of subsidies has a much smaller effect on efficiency than does the composition of total farm income. Relative productivity scores show that German and Swedish dairy farms have potential for improvement in productivity, compared to the production technology in the etherlands. In conclusion, it is questionable whether farm income support of CAP since the 1992 CAP reform is suitable to achieve its goal to increase farmers’ overall competitiveness by improving their efficiency.
{"title":"Technical efficiency and productivity differentials of dairy farms in three EU countries: the role of CAP subsidies","authors":"Xueqin Zhu, R. Demeter, A. Lansink","doi":"10.22004/AG.ECON.253496","DOIUrl":"https://doi.org/10.22004/AG.ECON.253496","url":null,"abstract":"The impact of EU agricultural support policies on farms’ economic performance is an interesting issue for policy makers. The objective of this paper is to investigate technical efficiency and technical efficiency change of specialized German, Dutch and Swedish dairy farms and to compare their relative productivity. Three subsidy-related variables are introduced to reflect the wealth and insurance effect and the coupling effect of Common Agricultural Policy (CAP) subsidies. Our results imply that a higher degree of coupling in farm support negatively affects farm efficiency, and the motivation of farmers to work efficiently is lower when they depend to a higher degree on subsidies as a source of income. Our study indicates that the composition of subsidies has a much smaller effect on efficiency than does the composition of total farm income. Relative productivity scores show that German and Swedish dairy farms have potential for improvement in productivity, compared to the production technology in the etherlands. In conclusion, it is questionable whether farm income support of CAP since the 1992 CAP reform is suitable to achieve its goal to increase farmers’ overall competitiveness by improving their efficiency.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"20 1","pages":"66-92"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85660661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Data from the Farm Accountancy Data etwork (FAD) over the period 2005 to 2010 were used to determine the factors that contribute to the financial performance of economically weak farms in Switzerland. The study analyses the economic performance of all farms represented in the 2005-2010 sample period found in terms of work income per family labour unit. To address this issue, the farms were split into two groups: the successful Group A, comprising farms with incomes above CHF 18,300, and the unsuccessful Group B, in which farms remain below this threshold. The differences between the farms in Group A and B were analysed using a panel data logit models. The study found ample evidence that full-time farms tend to be more successful in belonging to the successful group A than farms run only on a part-time basis. The analysis reveals that farms with specialist crops (fruit, vegetables, vines) and finishing farms (pigs and poultry) more frequently belong to the successful Group A than those geared to a different type of production (e.g. cattle rearing or dairy farming).
{"title":"Factors affecting the situation of economically weak farms in Switzerland","authors":"A. Roesch","doi":"10.22004/AG.ECON.253491","DOIUrl":"https://doi.org/10.22004/AG.ECON.253491","url":null,"abstract":"Data from the Farm Accountancy Data etwork (FAD) over the period 2005 to 2010 were used to determine the factors that contribute to the financial performance of economically weak farms in Switzerland. The study analyses the economic performance of all farms represented in the 2005-2010 sample period found in terms of work income per family labour unit. To address this issue, the farms were split into two groups: the successful Group A, comprising farms with incomes above CHF 18,300, and the unsuccessful Group B, in which farms remain below this threshold. The differences between the farms in Group A and B were analysed using a panel data logit models. The study found ample evidence that full-time farms tend to be more successful in belonging to the successful group A than farms run only on a part-time basis. The analysis reveals that farms with specialist crops (fruit, vegetables, vines) and finishing farms (pigs and poultry) more frequently belong to the successful Group A than those geared to a different type of production (e.g. cattle rearing or dairy farming).","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"201 1","pages":"23-38"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86994973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper estimates the technical efficiency of traditional variety (TV) and highyielding-variety (HYV) rice producers in Bangladesh as well as explores the determinants of HYV rice adoption in a survey data from 360 farmers for the 2008/09 growing seasons. Estimates by stochastic frontier analysis indicated that in spite of its much yield potential, HYV rice production was associated with lower technical efficiency and had a greater variability in yield. Results indicated that technical efficiency of HYV and TV rice were related to age, experience, off-farm income, extension visits, and access to microfinance. A Tobit analysis revealed that the adoption of HYV rice was significantly and positively influenced by farmers’ age and experience, level of technical efficiency, irrigation coverage, off-farm incomes, access to microfinance, perception of yield and membership of village-local groups.
{"title":"Do Differences in Technical Efficiency Explain the Adoption Rate of HYV Rice? Evidence from Bangladesh","authors":"K. M. Z. Islam, J. Sumelius, S. Bäckman","doi":"10.22004/AG.ECON.253500","DOIUrl":"https://doi.org/10.22004/AG.ECON.253500","url":null,"abstract":"This paper estimates the technical efficiency of traditional variety (TV) and highyielding-variety (HYV) rice producers in Bangladesh as well as explores the determinants of HYV rice adoption in a survey data from 360 farmers for the 2008/09 growing seasons. Estimates by stochastic frontier analysis indicated that in spite of its much yield potential, HYV rice production was associated with lower technical efficiency and had a greater variability in yield. Results indicated that technical efficiency of HYV and TV rice were related to age, experience, off-farm income, extension visits, and access to microfinance. A Tobit analysis revealed that the adoption of HYV rice was significantly and positively influenced by farmers’ age and experience, level of technical efficiency, irrigation coverage, off-farm incomes, access to microfinance, perception of yield and membership of village-local groups.","PeriodicalId":7541,"journal":{"name":"Agricultural Economics Review","volume":"10 1","pages":"93-110"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84809205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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