Pub Date : 2022-12-30DOI: 10.24997/kjae.2022.63.4.49
B. Ahn
In this study, working mechanism of the vegetable price stabilization policy is theoretically identified and the effects of this policy on farm household income is empirically assessed. Farm household income is evaluated to be increased by KRW 119.36 billion for the producers of winter radish, autumn radish, autumn cabbage and garlic, if the actual supply amount from the farmers participating in the policy is the same as the contract quantity under this policy. In addition, the income increase of non-participating farmers is estimated to be 107.3 billion won which is very high compared to 12.03 billion won for the income increase of participating farmers. The estimated overall effect is larger than the vegetable price stabilization policy cost of 106.9 billion won in 2021, which imply that the policy needs to be continuously implemented.
{"title":"An analysis of the operation mechanism of price stabilization policy for vegetables and its effects on farmers’income","authors":"B. Ahn","doi":"10.24997/kjae.2022.63.4.49","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.4.49","url":null,"abstract":"In this study, working mechanism of the vegetable price stabilization policy is theoretically identified and the effects of this policy on farm household income is empirically assessed. Farm household income is evaluated to be increased by KRW 119.36 billion for the producers of winter radish, autumn radish, autumn cabbage and garlic, if the actual supply amount from the farmers participating in the policy is the same as the contract quantity under this policy. In addition, the income increase of non-participating farmers is estimated to be 107.3 billion won which is very high compared to 12.03 billion won for the income increase of participating farmers. The estimated overall effect is larger than the vegetable price stabilization policy cost of 106.9 billion won in 2021, which imply that the policy needs to be continuously implemented.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125709201","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}
Pub Date : 2022-12-30DOI: 10.24997/kjae.2022.63.4.27
Sung-Joo Yoon, Jae Bong Chang
This study examined income mobility of farm household and investigated the determinants of the income mobility in Korea. For the analysis this study used Farm Household Economy Survey (2003-2020), which is surveyed by Statistics Korea, and employed transition matrix and probit specification. According to empirical results, the income mobility of farm household in Korea had been weaken for the time periods. The probability of upward and downward income mobility had been decreased; however, the probability of staying same income quintile had been increased. In particular, the tendency of remaining same income quintile became stronger around 2013. Next, we found that many farm household-related variables have positive effects on upward income mobility, which is similar to the previous studyies. However, we found stronger association between public transer income and upward income mobility of farm household in the high-income quintile rather than low-income quintile. The empirical results imply that government policy for farmhouse income should be targeted on the low-income farm household for improving income distribution and mobility.
{"title":"Farm Household Income Mobility and Its Determinants","authors":"Sung-Joo Yoon, Jae Bong Chang","doi":"10.24997/kjae.2022.63.4.27","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.4.27","url":null,"abstract":"This study examined income mobility of farm household and investigated the determinants of the income mobility in Korea. For the analysis this study used Farm Household Economy Survey (2003-2020), which is surveyed by Statistics Korea, and employed transition matrix and probit specification. According to empirical results, the income mobility of farm household in Korea had been weaken for the time periods. The probability of upward and downward income mobility had been decreased; however, the probability of staying same income quintile had been increased. In particular, the tendency of remaining same income quintile became stronger around 2013. Next, we found that many farm household-related variables have positive effects on upward income mobility, which is similar to the previous studyies. However, we found stronger association between public transer income and upward income mobility of farm household in the high-income quintile rather than low-income quintile. The empirical results imply that government policy for farmhouse income should be targeted on the low-income farm household for improving income distribution and mobility.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133848416","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}
Pub Date : 2022-12-30DOI: 10.24997/kjae.2022.63.4.67
Jeong-Hun Ji, S. H. Lee
Consumers’ perception of food safety can be influenced not only by the information but also by relevant experiences. Nevertheless, only a few studies have investigated how consumer experiences affect food safety consumption behavior. This study analyzes whether consumers’ negative experience(incidents) regarding food safety impacts their probability of purchasing Good Agricultural Practices (GAP) certified agricultural products. The Consumer Behavior Survey for Food Data of the Korea Rural Economic Institute was used for empirical analysis. The results showed that consumers who experienced food safety incidents are more likely to purchase GAP agricultural products than those who did not. However, the GAP agricultural product consumption behaviors of elderly consumers and low-income consumers did not change noticeably even after they experienced food safety incidents.
{"title":"The Effect of Food Safety Incidents Experience on the Probability of Purchasing GAP-certified Agricultural Products","authors":"Jeong-Hun Ji, S. H. Lee","doi":"10.24997/kjae.2022.63.4.67","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.4.67","url":null,"abstract":"Consumers’ perception of food safety can be influenced not only by the information but also by relevant experiences. Nevertheless, only a few studies have investigated how consumer experiences affect food safety consumption behavior. This study analyzes whether consumers’ negative experience(incidents) regarding food safety impacts their probability of purchasing Good Agricultural Practices (GAP) certified agricultural products. The Consumer Behavior Survey for Food Data of the Korea Rural Economic Institute was used for empirical analysis. The results showed that consumers who experienced food safety incidents are more likely to purchase GAP agricultural products than those who did not. However, the GAP agricultural product consumption behaviors of elderly consumers and low-income consumers did not change noticeably even after they experienced food safety incidents.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115964986","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}
Pub Date : 2022-12-30DOI: 10.24997/kjae.2022.63.4.85
D. Moon, G. Tonsor
The classical discrete choice model assumes that decision-makers consider all attributes in choice situations. However, decision-making often relies on some heuristic process instead of full attribute assessment. Unlike previous literature based on stated choice data, this study attempted to accommodate attribute inattention into a discrete choice model using market data. Our test reports getting better models fit in where they include both choice heuristic and full attribute preservation rules than in the conventional assumption. Accordingly, the heterogeneous decision rules need to be considered in choice modeling as an alternative to the traditional assumption. It is expected that this approach will help to derive food marketing implications for the consumer segments corresponding to each decision rule, reflecting multiple decision-making rules.
{"title":"Choice Heuristics in Processed Food Purchases: The Case of Hotdog Purchase in the U.S.","authors":"D. Moon, G. Tonsor","doi":"10.24997/kjae.2022.63.4.85","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.4.85","url":null,"abstract":"The classical discrete choice model assumes that decision-makers consider all attributes in choice situations. However, decision-making often relies on some heuristic process instead of full attribute assessment. Unlike previous literature based on stated choice data, this study attempted to accommodate attribute inattention into a discrete choice model using market data. Our test reports getting better models fit in where they include both choice heuristic and full attribute preservation rules than in the conventional assumption. Accordingly, the heterogeneous decision rules need to be considered in choice modeling as an alternative to the traditional assumption. It is expected that this approach will help to derive food marketing implications for the consumer segments corresponding to each decision rule, reflecting multiple decision-making rules.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128120525","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}
Pub Date : 2022-12-30DOI: 10.24997/kjae.2022.63.4.1
Seung-yeon Byun, D. Yoo
Plant-based meat is one of the most commercialized alternative protein foods, and its market size is increasing worldwide. Media often emphasizes such an increase is led by vegetarians’ preferences. This study begins with asking whether vegetarians’ roles are so crucial in the market and aims to understand their intake intention for plant-based meat. For this study, we use Decision-Tree model to identify vegetarians' characteristics and use logistic regression and ordered logistic regression to analyze the determinants of intake intention for plant-based meat. Results show the followings: First, main determinants of intake intention for plant-based meats were interest in health, food safety and the environment. Second, vegetarians' preferences for plant-based meat was not so high as media has emphasized. This study is meaningful in that it identifies determinants of intake intention for plant-based meat and suggests future strategies for consumption enhancement.
{"title":"Determinants of Plant-based Meat Intake Intention","authors":"Seung-yeon Byun, D. Yoo","doi":"10.24997/kjae.2022.63.4.1","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.4.1","url":null,"abstract":"Plant-based meat is one of the most commercialized alternative protein foods, and its market size is increasing worldwide. Media often emphasizes such an increase is led by vegetarians’ preferences. This study begins with asking whether vegetarians’ roles are so crucial in the market and aims to understand their intake intention for plant-based meat. For this study, we use Decision-Tree model to identify vegetarians' characteristics and use logistic regression and ordered logistic regression to analyze the determinants of intake intention for plant-based meat. Results show the followings: First, main determinants of intake intention for plant-based meats were interest in health, food safety and the environment. Second, vegetarians' preferences for plant-based meat was not so high as media has emphasized. This study is meaningful in that it identifies determinants of intake intention for plant-based meat and suggests future strategies for consumption enhancement.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126165795","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}
Pub Date : 2022-09-30DOI: 10.24997/kjae.2022.63.3.169
Yiyang Qiao, B. Ahn
In 2018, African Swine Fever (ASF) first broke out in China and had a noticeable effect on China’s pork market and the entire meat market. This paper models China’s meat market, including pork, beef, mutton, and poultry, and examines how the outbreak of ASF impacts structural changes in China’s meat demand. We use the inverse almost ideal demand system (IAIDS) model and employ province-level meat consumption and price data to form the panel data set of 30 provinces of China from 2015 to 2020. Our results indicate that ASF has a significant impact on the demand for pork, poultry, and mutton. Based on the estimated price flexibilities and scale flexibilities, we find that the outbreak of ASF impacts structural change in China’s meat demand. Furthermore, our results show the heterogeneity of the ASF’s effects across different provinces in China.
{"title":"Impacts of African Swine Fever on Structural Change in China’s Meat Demand","authors":"Yiyang Qiao, B. Ahn","doi":"10.24997/kjae.2022.63.3.169","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.3.169","url":null,"abstract":"In 2018, African Swine Fever (ASF) first broke out in China and had a noticeable effect on China’s pork market and the entire meat market. This paper models China’s meat market, including pork, beef, mutton, and poultry, and examines how the outbreak of ASF impacts structural changes in China’s meat demand. We use the inverse almost ideal demand system (IAIDS) model and employ province-level meat consumption and price data to form the panel data set of 30 provinces of China from 2015 to 2020. Our results indicate that ASF has a significant impact on the demand for pork, poultry, and mutton. Based on the estimated price flexibilities and scale flexibilities, we find that the outbreak of ASF impacts structural change in China’s meat demand. Furthermore, our results show the heterogeneity of the ASF’s effects across different provinces in China.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115150729","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}
Pub Date : 2022-09-30DOI: 10.24997/kjae.2022.63.3.19
Youngjune Kim
Land price has increased significantly in recent years, affecting the liquidity gap between beginning farmers and existing farmers. The liquidity gap could result in widening inequalities in land size, asset gaps and loan alienation of beginning farmers. Using two 5-year farm-level panel dataset from the Korean Farm Household Economy Survey, this paper estimates the effect of increases in land price on borrowing with a developed identification strategy. Based on the estimates, this paper analyzes the extent of the liquidity gap between beginning farmers and existing farmers due to increases in land price. The results show that a 1% increase in farmland wealth is associated with farmers’ borrowing increase by 1.82%. The results also indicate that a 20% increase in farmland wealth leads to a 6.6 million won in liquidity gap between beginning farmers and existing farmers.
{"title":"Increases in Land Price and Liquidity Gap between Beginning and Existing Farmers","authors":"Youngjune Kim","doi":"10.24997/kjae.2022.63.3.19","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.3.19","url":null,"abstract":"Land price has increased significantly in recent years, affecting the liquidity gap between beginning farmers and existing farmers. The liquidity gap could result in widening inequalities in land size, asset gaps and loan alienation of beginning farmers. Using two 5-year farm-level panel dataset from the Korean Farm Household Economy Survey, this paper estimates the effect of increases in land price on borrowing with a developed identification strategy. Based on the estimates, this paper analyzes the extent of the liquidity gap between beginning farmers and existing farmers due to increases in land price. The results show that a 1% increase in farmland wealth is associated with farmers’ borrowing increase by 1.82%. The results also indicate that a 20% increase in farmland wealth leads to a 6.6 million won in liquidity gap between beginning farmers and existing farmers.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133799425","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}
Pub Date : 2022-09-30DOI: 10.24997/kjae.2022.63.3.193
Cherry Kim, Kwansoo Kim
An unexpected surge in sugar imports in 2008 under NAFTA resulted in a large U.S. sugar price fluctuation. This study explores the acreage decision for U.S. sugar beets in an environment where both price support and trade liberalization takes place at the same time. Our empirical analysis is based on county-level data for sugar beets and three substitute crops (corn, soybean and wheat) in twelve U.S. sugar beet growing states over 1997-2018. While we find that an increase in price fluctuation overall has adverse impacts on acreage, the results indicate that farmers respond to price risk differently before and after NAFTA and to the level of price risk. This suggests a need for more precise policy instruments that better protect against unexpected income loss rather than a fixed level of support and enable producers to deal with future extreme events.
{"title":"Acreage Response to Price Support and Price Risk under Trade Liberalization","authors":"Cherry Kim, Kwansoo Kim","doi":"10.24997/kjae.2022.63.3.193","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.3.193","url":null,"abstract":"An unexpected surge in sugar imports in 2008 under NAFTA resulted in a large U.S. sugar price fluctuation. This study explores the acreage decision for U.S. sugar beets in an environment where both price support and trade liberalization takes place at the same time. Our empirical analysis is based on county-level data for sugar beets and three substitute crops (corn, soybean and wheat) in twelve U.S. sugar beet growing states over 1997-2018. While we find that an increase in price fluctuation overall has adverse impacts on acreage, the results indicate that farmers respond to price risk differently before and after NAFTA and to the level of price risk. This suggests a need for more precise policy instruments that better protect against unexpected income loss rather than a fixed level of support and enable producers to deal with future extreme events.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872875","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}
Pub Date : 2022-09-30DOI: 10.24997/kjae.2022.63.3.55
Jeong-hwan Kim, Ji Yong Lee
The pandemic of COVID19 has significantly changed consumers' food consumption and waste behaviors. Specifically, the main section of households’ food consumption shifted from food awayfrom- home to eating at home which could be connected with household food wastes. This study estimated the effect of COVID19 on the amount of household food wastes by using Consumer Behavior Survey for Food(CBSF) data. We analyzed the effect of COVID19 on household food waste emissions using the ordered logit model given the theory that food waste emissions are influenced by food prices and opportunity costs of food utilizing. We found that household food wastes increase after COVID19, and a change of the opportunity cost of food utilizing causes increase in food wastes. Based on results, we provide policy implications regarding reduction in food wastes.
{"title":"Impact of COVID19 on Household Food Waste","authors":"Jeong-hwan Kim, Ji Yong Lee","doi":"10.24997/kjae.2022.63.3.55","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.3.55","url":null,"abstract":"The pandemic of COVID19 has significantly changed consumers' food consumption and waste behaviors. Specifically, the main section of households’ food consumption shifted from food awayfrom- home to eating at home which could be connected with household food wastes. This study estimated the effect of COVID19 on the amount of household food wastes by using Consumer Behavior Survey for Food(CBSF) data. We analyzed the effect of COVID19 on household food waste emissions using the ordered logit model given the theory that food waste emissions are influenced by food prices and opportunity costs of food utilizing. We found that household food wastes increase after COVID19, and a change of the opportunity cost of food utilizing causes increase in food wastes. Based on results, we provide policy implications regarding reduction in food wastes.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132102906","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}
Pub Date : 2022-09-30DOI: 10.24997/kjae.2022.63.3.219
Dong Hwi Kim, Yoonhyung Kim
This study analyzed the benefits of the B2B online agricultural exchange, which is promoted by the government for digital transformation in the distribution sector as the Fourth Industrial Revolution technology is introduced and the agricultural distribution environment is changing rapidly owing to COVID-19. Currently, the Korean government is conducting the national B2B online agricultural exchange, where sellers, including producer organizations and agricultural corporations, can make direct transactions and buyers, including public market wholesale corporations, intermediaries, and trade participants, can purchase agricultural products through the online platform, regardless of time and location. Against this backdrop, we analyzed the potential benefits of the online agricultural exchange, divided into those from the reduction in distribution stages and from the increase in user convenience. For the analysis, benefits from the reduction in distribution stages are divided into logistics cost saving, shrinkage loss reduction, and commission reduction. Benefits from the increase in user convenience are divided into shipper’s saving of search cost and buyer’s saving of transaction cost. Assuming that the online agricultural exchange is worth KRW 500 billion, the expected economic benefit was analyzed to be about KRW 38.3 billion per year.
{"title":"Benefit Analysis of Online Korea Agri-Food Exchange","authors":"Dong Hwi Kim, Yoonhyung Kim","doi":"10.24997/kjae.2022.63.3.219","DOIUrl":"https://doi.org/10.24997/kjae.2022.63.3.219","url":null,"abstract":"This study analyzed the benefits of the B2B online agricultural exchange, which is promoted by the government for digital transformation in the distribution sector as the Fourth Industrial Revolution technology is introduced and the agricultural distribution environment is changing rapidly owing to COVID-19. Currently, the Korean government is conducting the national B2B online agricultural exchange, where sellers, including producer organizations and agricultural corporations, can make direct transactions and buyers, including public market wholesale corporations, intermediaries, and trade participants, can purchase agricultural products through the online platform, regardless of time and location. \u0000Against this backdrop, we analyzed the potential benefits of the online agricultural exchange, divided into those from the reduction in distribution stages and from the increase in user convenience. For the analysis, benefits from the reduction in distribution stages are divided into logistics cost saving, shrinkage loss reduction, and commission reduction. Benefits from the increase in user convenience are divided into shipper’s saving of search cost and buyer’s saving of transaction cost. Assuming that the online agricultural exchange is worth KRW 500 billion, the expected economic benefit was analyzed to be about KRW 38.3 billion per year.","PeriodicalId":136411,"journal":{"name":"Korean Agricultural Economics Association","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132519879","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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