Pub Date : 2022-11-10DOI: 10.1177/13548166221138636
Chen Hao, Xuegang Feng, Dandan Wu, Xiaodong Guo
Taking the tourism and related industry companies listed in Shanghai and Shenzhen of China from 2006 to 2019 as samples, this paper examines the impact of board interlock on corporate risk-taking and its micro-mechanism. Empirical evidence shows that board interlock can significantly improve corporate risk-taking, but the degree of influence varies from industry to industry. For the external risk sensitivity of industry, in the industry with high external risk sensitivity, the “quantity embedding” of interlocking directors has a stronger promoting effect on enterprise risk-taking. However, in industries with low external risk sensitivity, the “quality embedding” of interlocking directors has a stronger promoting effect on enterprise risk-taking. For the degree of industry competition, the more intense the industry competition, the stronger the role of board interlocks in promoting enterprise risk-taking. Further analysis shows that the intensity of information effect and the intensity of resource effect vary with the degree of information asymmetry and the type of directors.
{"title":"Board interlocks and corporate risk-taking: An empirical analysis of listed companies from tourism and related industries in China","authors":"Chen Hao, Xuegang Feng, Dandan Wu, Xiaodong Guo","doi":"10.1177/13548166221138636","DOIUrl":"https://doi.org/10.1177/13548166221138636","url":null,"abstract":"Taking the tourism and related industry companies listed in Shanghai and Shenzhen of China from 2006 to 2019 as samples, this paper examines the impact of board interlock on corporate risk-taking and its micro-mechanism. Empirical evidence shows that board interlock can significantly improve corporate risk-taking, but the degree of influence varies from industry to industry. For the external risk sensitivity of industry, in the industry with high external risk sensitivity, the “quantity embedding” of interlocking directors has a stronger promoting effect on enterprise risk-taking. However, in industries with low external risk sensitivity, the “quality embedding” of interlocking directors has a stronger promoting effect on enterprise risk-taking. For the degree of industry competition, the more intense the industry competition, the stronger the role of board interlocks in promoting enterprise risk-taking. Further analysis shows that the intensity of information effect and the intensity of resource effect vary with the degree of information asymmetry and the type of directors.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42735845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-07DOI: 10.1177/13548166221138159
Hung Wan Kot, Ming-Hsiang Chen, C. Su, Yu-xia Lin
It is impossible to overstate the importance of culture and literature in tourism. Most studies have relied on qualitative evidence to the exclusion of precise secondary data to show a direct link between literature and tourism. Using a novel and unique index of Tang poems ranks as a proxy for cultural status and heritage accumulation to quantify the effects of Tang poetry on the expansion of domestic and international tourism, this research adds significantly to the body of knowledge on literary tourism. Based on ordinary least squares and bias-corrected propensity score matching regression analysis, the top 100 Tang poetry rankings are favorably associated with domestic tourist growth but not with international tourism expansion. These findings are crucial for the development of literary tourism.
{"title":"Tang poetry and tourism: Cultural effects after 1000 years","authors":"Hung Wan Kot, Ming-Hsiang Chen, C. Su, Yu-xia Lin","doi":"10.1177/13548166221138159","DOIUrl":"https://doi.org/10.1177/13548166221138159","url":null,"abstract":"It is impossible to overstate the importance of culture and literature in tourism. Most studies have relied on qualitative evidence to the exclusion of precise secondary data to show a direct link between literature and tourism. Using a novel and unique index of Tang poems ranks as a proxy for cultural status and heritage accumulation to quantify the effects of Tang poetry on the expansion of domestic and international tourism, this research adds significantly to the body of knowledge on literary tourism. Based on ordinary least squares and bias-corrected propensity score matching regression analysis, the top 100 Tang poetry rankings are favorably associated with domestic tourist growth but not with international tourism expansion. These findings are crucial for the development of literary tourism.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49154054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-07DOI: 10.1177/13548166221137385
J. Payne, Junsoo Lee
This study extends the literature on the permanent or transitory nature of shocks to per capita tourist arrivals along several dimensions. First, the study evaluates the nature of shocks to per capita tourist arrivals for a global panel of 129 countries. Second, unlike previous studies, we jointly estimate structural changes that represent either abrupt breaks or as a Fourier approximation of smooth breaks along with introducing a factor structure to test for the presence of unit roots in per capita tourist arrivals. Third, contrary to previous studies, our results show that rejection of the null hypothesis of a unit root in per capita tourist arrivals is quite limited compared to other unit root tests that fail to account for cross-correlations. Policy implications of the findings are also discussed.
{"title":"Global perspective on the permanent or transitory nature of shocks to tourist arrivals: Evidence from new unit root tests with structural breaks and factors","authors":"J. Payne, Junsoo Lee","doi":"10.1177/13548166221137385","DOIUrl":"https://doi.org/10.1177/13548166221137385","url":null,"abstract":"This study extends the literature on the permanent or transitory nature of shocks to per capita tourist arrivals along several dimensions. First, the study evaluates the nature of shocks to per capita tourist arrivals for a global panel of 129 countries. Second, unlike previous studies, we jointly estimate structural changes that represent either abrupt breaks or as a Fourier approximation of smooth breaks along with introducing a factor structure to test for the presence of unit roots in per capita tourist arrivals. Third, contrary to previous studies, our results show that rejection of the null hypothesis of a unit root in per capita tourist arrivals is quite limited compared to other unit root tests that fail to account for cross-correlations. Policy implications of the findings are also discussed.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49005604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-04DOI: 10.1177/13548166221137950
A. Ivlevs, Ian Smith
Can international tourist arrivals change residents’ attitudes towards immigrants and immigration? We discuss possible underlying mechanisms and provide the first evidence on this question using data from the European Social Survey (2002–2019; n=333,505). We find that, as tourist arrivals grow, residents become more positive towards immigration in Eastern Europe. In Western Europe, the relationship tends to turn from positive to negative at relatively high levels of tourism. The instrumental variable analysis suggests that incoming tourism has a positive causal effect on attitudes towards immigration in both Western and Eastern Europe. Overall, our study reveals an overlooked dimension of the tourism-migration nexus and highlights the role that international tourism may play in shaping attitudes towards immigration and, through these attitudes, immigration policy and flows, immigrant integration and more open and inclusive societies in tourism-receiving countries.
{"title":"Do international tourist arrivals change residents’ attitudes towards immigration? A longitudinal study of 28 European countries","authors":"A. Ivlevs, Ian Smith","doi":"10.1177/13548166221137950","DOIUrl":"https://doi.org/10.1177/13548166221137950","url":null,"abstract":"Can international tourist arrivals change residents’ attitudes towards immigrants and immigration? We discuss possible underlying mechanisms and provide the first evidence on this question using data from the European Social Survey (2002–2019; n=333,505). We find that, as tourist arrivals grow, residents become more positive towards immigration in Eastern Europe. In Western Europe, the relationship tends to turn from positive to negative at relatively high levels of tourism. The instrumental variable analysis suggests that incoming tourism has a positive causal effect on attitudes towards immigration in both Western and Eastern Europe. Overall, our study reveals an overlooked dimension of the tourism-migration nexus and highlights the role that international tourism may play in shaping attitudes towards immigration and, through these attitudes, immigration policy and flows, immigrant integration and more open and inclusive societies in tourism-receiving countries.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42725066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-21DOI: 10.1177/13548166221132645
Xi Wu, A. Blake
The aim of this study is to assess whether combining econometric models with different explanatory variables can contribute to better tourism demand forecasts. Inbound tourism demand to the UK from seven leading markets is forecast, respectively, based on quarterly data using both individual and combination models. Causal econometric models that serve as constituents in combination take two specifications which are different in identified influencing factors. The empirical results show that generally including different explanatory variables in combination can produce better predictions according to both predictive accuracy measures and statistical tests. It suggests that the combination forecasting approach is superior to the individual one, and diversified information embedded in different explanatory variables should be integrated to improve tourism demand forecasting performance.
{"title":"Does the combination of models With different explanatory variables improve tourism demand forecasting performance?","authors":"Xi Wu, A. Blake","doi":"10.1177/13548166221132645","DOIUrl":"https://doi.org/10.1177/13548166221132645","url":null,"abstract":"The aim of this study is to assess whether combining econometric models with different explanatory variables can contribute to better tourism demand forecasts. Inbound tourism demand to the UK from seven leading markets is forecast, respectively, based on quarterly data using both individual and combination models. Causal econometric models that serve as constituents in combination take two specifications which are different in identified influencing factors. The empirical results show that generally including different explanatory variables in combination can produce better predictions according to both predictive accuracy measures and statistical tests. It suggests that the combination forecasting approach is superior to the individual one, and diversified information embedded in different explanatory variables should be integrated to improve tourism demand forecasting performance.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45155752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-19DOI: 10.1177/13548166221133493
Faruk Balli, Mabruk Billah, Iftekhar Chowdhury
This study explores the impact of the Russian–Ukraine war on the hospitality equity sector market for the selected 26 countries. It reveals a sharp spike in the return connectivity at the onset of the war. The return of the sector materializes more sensitivity when tourism demand from Russia and Ukraine is more extensive and when a country has a higher energy dependency on Russia. Overall results consistently stipulate the aspect of the efficient market hypothesis.
{"title":"Impact of the Russia–Ukraine war on hospitality equity markets","authors":"Faruk Balli, Mabruk Billah, Iftekhar Chowdhury","doi":"10.1177/13548166221133493","DOIUrl":"https://doi.org/10.1177/13548166221133493","url":null,"abstract":"This study explores the impact of the Russian–Ukraine war on the hospitality equity sector market for the selected 26 countries. It reveals a sharp spike in the return connectivity at the onset of the war. The return of the sector materializes more sensitivity when tourism demand from Russia and Ukraine is more extensive and when a country has a higher energy dependency on Russia. Overall results consistently stipulate the aspect of the efficient market hypothesis.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43761973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-16DOI: 10.1177/13548166221134183
B. Saboori, Z. Ghaderi, A. Soleymani
In this study for the first time, we examined the effect of tourism market diversification (TMD) on economic growth for 109 countries categorized by income groups. Employing Quantile regression, the results revealed that TMD contributes to the economic growth of low- and lower-middle-income countries only at the lower, and lower-to-intermediate quantiles. In high-income countries, TMD not only has no significant effect on economic growth at lower quantile of GDP, but its effect tends to be negative at higher quantiles. Our findings indicated that TMD strategies work better at lower levels of economic growth than at higher levels of economic growth.
{"title":"A revised perspective on tourism-economic growth nexus, exploring tourism market diversification","authors":"B. Saboori, Z. Ghaderi, A. Soleymani","doi":"10.1177/13548166221134183","DOIUrl":"https://doi.org/10.1177/13548166221134183","url":null,"abstract":"In this study for the first time, we examined the effect of tourism market diversification (TMD) on economic growth for 109 countries categorized by income groups. Employing Quantile regression, the results revealed that TMD contributes to the economic growth of low- and lower-middle-income countries only at the lower, and lower-to-intermediate quantiles. In high-income countries, TMD not only has no significant effect on economic growth at lower quantile of GDP, but its effect tends to be negative at higher quantiles. Our findings indicated that TMD strategies work better at lower levels of economic growth than at higher levels of economic growth.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":"29 1","pages":"1812 - 1835"},"PeriodicalIF":4.4,"publicationDate":"2022-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49359864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-13DOI: 10.1177/13548166221132452
Federico Carril-Caccia, J. M. Martín Martín, F. J. Sáez-Fernández
Using a bilateral dataset of trips for 32 European countries for the period 2012–2019, we aim to gauge the size and evolution of the border effect on tourism: the extent to which domestic tourism is greater (or lesser) than international tourism. We found that the tourism flow within countries was 24 times greater than between countries. Also, we show that, relative to 2012, the border effect diminished by 13% in 2019. Our results suggest that the size (and evolution) of the border effect is the same for trips that last between one and three nights (short trips) and those that last four nights or more (long trips). Nonetheless, our findings show that bilateral determinants that represent travel and transaction costs are more important when explaining short trips than long ones.
{"title":"How important are borders for tourism? The case of Europe","authors":"Federico Carril-Caccia, J. M. Martín Martín, F. J. Sáez-Fernández","doi":"10.1177/13548166221132452","DOIUrl":"https://doi.org/10.1177/13548166221132452","url":null,"abstract":"Using a bilateral dataset of trips for 32 European countries for the period 2012–2019, we aim to gauge the size and evolution of the border effect on tourism: the extent to which domestic tourism is greater (or lesser) than international tourism. We found that the tourism flow within countries was 24 times greater than between countries. Also, we show that, relative to 2012, the border effect diminished by 13% in 2019. Our results suggest that the size (and evolution) of the border effect is the same for trips that last between one and three nights (short trips) and those that last four nights or more (long trips). Nonetheless, our findings show that bilateral determinants that represent travel and transaction costs are more important when explaining short trips than long ones.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48681919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-09DOI: 10.1177/13548166221131722
Lucie Plzáková, E. Smeral
For more than 2 years we have been subjected to COVID-19 outbreaks of varying intensities. These shocks, and the resultant containment measures, have severely damaged both societies and economies, including tourism industries. In 2020, global GDP decreased by 3%. Rough estimates of the total economic costs of the pandemic in 2020 approximate 100% of global GDP in 2019 and encompass the recession costs in 2020, growth losses for the period from 2021 to 2030, the costs of fiscal impulses, changes in government debt and the statistical value of deaths related to COVID-19 as well as losses in education and human capital, which have substantially eroded social resilience (Yeyati and Filippini, 2021). The economic downturn triggered by COVID-19 has often been compared with the effects of the Global Financial Crisis (GFC) 2008/09, yet such comparisons are flawed as the GFC resulted primarily from a demand shock, whereas the present COVID-19 crisis is more or less a combination of both supply and demand shocks. Delivery chains have been interrupted and millions of people have lost their jobs, at least temporarily, as government measures forced most businesses to close in order to reduce infection risks. The economic downturn, coupled with high unemployment, severe income losses, burning liquidity problems and the mandated closing of shops, hotels, restaurants and the cessation of air or bus transportation have led to a freefall in demand, especially in tourism. These shocks raise important questions about the resilience of current socio-economic systems in general, and particularly in the case of the most affected sub-system: tourism. Tourism has been hit particularly hard, with international arrivals decreasing by 73% in 2020 (UNWTO, 2022); the main reasons for this development being lockdowns, mobility restrictions and income losses triggered by the pandemic and the enacted containment measures. Data for 2020 show that countries including France, Italy and Spain, which have a relative high tourism share, suffered more substantial GDP losses than countries with a lower dependency on contact-intensive services,
{"title":"COVID-19 pandemic, the war in Ukraine and looming risks for tourism’s recovery","authors":"Lucie Plzáková, E. Smeral","doi":"10.1177/13548166221131722","DOIUrl":"https://doi.org/10.1177/13548166221131722","url":null,"abstract":"For more than 2 years we have been subjected to COVID-19 outbreaks of varying intensities. These shocks, and the resultant containment measures, have severely damaged both societies and economies, including tourism industries. In 2020, global GDP decreased by 3%. Rough estimates of the total economic costs of the pandemic in 2020 approximate 100% of global GDP in 2019 and encompass the recession costs in 2020, growth losses for the period from 2021 to 2030, the costs of fiscal impulses, changes in government debt and the statistical value of deaths related to COVID-19 as well as losses in education and human capital, which have substantially eroded social resilience (Yeyati and Filippini, 2021). The economic downturn triggered by COVID-19 has often been compared with the effects of the Global Financial Crisis (GFC) 2008/09, yet such comparisons are flawed as the GFC resulted primarily from a demand shock, whereas the present COVID-19 crisis is more or less a combination of both supply and demand shocks. Delivery chains have been interrupted and millions of people have lost their jobs, at least temporarily, as government measures forced most businesses to close in order to reduce infection risks. The economic downturn, coupled with high unemployment, severe income losses, burning liquidity problems and the mandated closing of shops, hotels, restaurants and the cessation of air or bus transportation have led to a freefall in demand, especially in tourism. These shocks raise important questions about the resilience of current socio-economic systems in general, and particularly in the case of the most affected sub-system: tourism. Tourism has been hit particularly hard, with international arrivals decreasing by 73% in 2020 (UNWTO, 2022); the main reasons for this development being lockdowns, mobility restrictions and income losses triggered by the pandemic and the enacted containment measures. Data for 2020 show that countries including France, Italy and Spain, which have a relative high tourism share, suffered more substantial GDP losses than countries with a lower dependency on contact-intensive services,","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42985211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-06DOI: 10.1177/13548166221132124
Jieping Chen, Chaohui Ma, Shijun Chen
This paper aims to analyze and explain how urban centrality influences tourism development in a city. Based on the panel data of 295 prefecture-level cities in China from 2005 to 2018, the paper develops explanatory mechanisms and discusses the influence theoretically and empirically. To advance the analysis, this paper constructs a new index for urban centrality. Our empirical findings are as follows: (1) urban centrality promotes tourism income significantly. (2) Mechanism analysis illustrates that urban centrality fosters tourism through the agglomeration and industrial structure effects. (3) Heterogenous analysis suggests that the influence of urban centrality on tourism varies with city sizes and locations.
{"title":"Determinant of the tourism economy in Chinese cities: from an urban centrality perspective","authors":"Jieping Chen, Chaohui Ma, Shijun Chen","doi":"10.1177/13548166221132124","DOIUrl":"https://doi.org/10.1177/13548166221132124","url":null,"abstract":"This paper aims to analyze and explain how urban centrality influences tourism development in a city. Based on the panel data of 295 prefecture-level cities in China from 2005 to 2018, the paper develops explanatory mechanisms and discusses the influence theoretically and empirically. To advance the analysis, this paper constructs a new index for urban centrality. Our empirical findings are as follows: (1) urban centrality promotes tourism income significantly. (2) Mechanism analysis illustrates that urban centrality fosters tourism through the agglomeration and industrial structure effects. (3) Heterogenous analysis suggests that the influence of urban centrality on tourism varies with city sizes and locations.","PeriodicalId":23204,"journal":{"name":"Tourism Economics","volume":" ","pages":""},"PeriodicalIF":4.4,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46227055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"管理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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