This paper examines the relationship between export diversification, export margins and economic growth at the industry level using Thailand as a case study during 2002–16. Our results show that the effects of export diversification and margins on economic growth vary across industries. Export diversification helps boost growth only in some sectors, including electronics, automotive and chemicals, plastic and rubber, while in the processed food, and textiles and apparel industries, specialisation matters more in promoting growth. In almost all industries, a non‐linear relationship between diversification and economic growth is not revealed, except in textiles and apparel. The diversification is crucial in enhancing the impact of exports on growth only in the processed food and textiles and apparel industries. Expansion of intensive margins plays an important role in boosting growth in key industries within Thailand. The role of extensive margins, both in terms of new products and new market destinations, in promoting economic growth is limited. For extensive margins (new products), it is found to be significant in boosting economic growth only in processed food and textiles and apparel, while in the case of extensive margins (new market destinations), its significance in boosting growth is revealed only in the electronics sector.
{"title":"Export Diversification, Margins and Economic Growth at Industrial Level: Evidence from Thailand","authors":"Juthathip Jongwanich","doi":"10.1111/twec.12921","DOIUrl":"https://doi.org/10.1111/twec.12921","url":null,"abstract":"This paper examines the relationship between export diversification, export margins and economic growth at the industry level using Thailand as a case study during 2002–16. Our results show that the effects of export diversification and margins on economic growth vary across industries. Export diversification helps boost growth only in some sectors, including electronics, automotive and chemicals, plastic and rubber, while in the processed food, and textiles and apparel industries, specialisation matters more in promoting growth. In almost all industries, a non‐linear relationship between diversification and economic growth is not revealed, except in textiles and apparel. The diversification is crucial in enhancing the impact of exports on growth only in the processed food and textiles and apparel industries. Expansion of intensive margins plays an important role in boosting growth in key industries within Thailand. The role of extensive margins, both in terms of new products and new market destinations, in promoting economic growth is limited. For extensive margins (new products), it is found to be significant in boosting economic growth only in processed food and textiles and apparel, while in the case of extensive margins (new market destinations), its significance in boosting growth is revealed only in the electronics sector.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116101815","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}
Is the gravity model as applicable to trade in intermediate inputs as it is to trade in final goods? One of the contributions of this paper is that we explicitly account for the dual nature of products that can be used as either intermediate inputs or final goods. We find that the structural gravity model performs extremely well for describing bilateral trade in final goods and in intermediate inputs. Moreover, this continues to hold even when we focus on a subset of countries in which intermediate inputs trade accounts for a growing share of trade, namely ‘Factory Asia’. However, the gravity model may perform poorly due to model misspecification (i.e., exclusion of intranational trade) and/or sample selection, even after the model considers the dual nature of products. We demonstrate that the poor performance of the gravity model is not attributable to the large trade flow of intermediate inputs, which supports the continued use of the model as these trade flows continue to grow in importance worldwide.
{"title":"The Gravity Model and Trade in Intermediate Inputs","authors":"Theresa M. Greaney, Kozo Kiyota","doi":"10.1111/twec.12947","DOIUrl":"https://doi.org/10.1111/twec.12947","url":null,"abstract":"Is the gravity model as applicable to trade in intermediate inputs as it is to trade in final goods? One of the contributions of this paper is that we explicitly account for the dual nature of products that can be used as either intermediate inputs or final goods. We find that the structural gravity model performs extremely well for describing bilateral trade in final goods and in intermediate inputs. Moreover, this continues to hold even when we focus on a subset of countries in which intermediate inputs trade accounts for a growing share of trade, namely ‘Factory Asia’. However, the gravity model may perform poorly due to model misspecification (i.e., exclusion of intranational trade) and/or sample selection, even after the model considers the dual nature of products. We demonstrate that the poor performance of the gravity model is not attributable to the large trade flow of intermediate inputs, which supports the continued use of the model as these trade flows continue to grow in importance worldwide.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"1998 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132481120","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 is the first that quantifies the impact of single windows (SWs) on international trade globally. SWs function as a single point of entry and exit of the goods traded internationally and are therefore intended to facilitate trade. Using a structural gravity model for a panel of 176 countries from 1995 to 2017, we apply a log–log and a Poisson pseudo‐maximum‐likelihood estimator (PPML) with multidimensional fixed effects to evaluate the extent to which export and import flows vary depending on whether or not countries have operational SWs. The main results from the linearised gravity model suggest that total trade between two countries with functioning SWs increases by about 37%, of which 23 corresponds to exports and 14 to imports. The result from the PPML estimation also indicates a positive and significant effect, which is however much smaller in magnitude.
{"title":"The Impact of Single Windows on Trade","authors":"I. Martínez‐Zarzoso, S. Chelala","doi":"10.1111/twec.12945","DOIUrl":"https://doi.org/10.1111/twec.12945","url":null,"abstract":"This paper is the first that quantifies the impact of single windows (SWs) on international trade globally. SWs function as a single point of entry and exit of the goods traded internationally and are therefore intended to facilitate trade. Using a structural gravity model for a panel of 176 countries from 1995 to 2017, we apply a log–log and a Poisson pseudo‐maximum‐likelihood estimator (PPML) with multidimensional fixed effects to evaluate the extent to which export and import flows vary depending on whether or not countries have operational SWs. The main results from the linearised gravity model suggest that total trade between two countries with functioning SWs increases by about 37%, of which 23 corresponds to exports and 14 to imports. The result from the PPML estimation also indicates a positive and significant effect, which is however much smaller in magnitude.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126390308","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}
Income inequality has increased in China despite rapid economic growth. Income inequality could impinge on future development, leading to social tension or political instability. Our study investigates the short‐run and long‐run relationship between three important macroeconomic indicators—income inequality, economic growth and financial depth. We utilise a two‐step procedure of ARDL bounds and Granger causality for the analysis. The bounds test indicates the presence of a cointegrating relationship between income inequality, financial depth and economic growth in the long run. In the second step, we utilise the Granger causality approach. Results show a bidirectional causality between financial depth‐growth and a unidirectional causality between inequality‐growth in the short run. In the long run, results reveal that growth and financial depth determine Gini. Our findings provide support for the inequality‐widening effect due to economic growth and higher credit provided to the private sector. We find no evidence of inequality‐narrowing or income‐equalising effect in the long run for the period of study. It is possible that the government's inclusive growth policies which started less than a decade ago have not taken effect for us to capture the inverted U‐shape income equalising effect significantly.
{"title":"The Income Inequality, Financial Depth and Economic Growth Nexus in China","authors":"Sharon G. M. Koh, Grace H. Y. Lee, E. Bomhoff","doi":"10.1111/twec.12825","DOIUrl":"https://doi.org/10.1111/twec.12825","url":null,"abstract":"Income inequality has increased in China despite rapid economic growth. Income inequality could impinge on future development, leading to social tension or political instability. Our study investigates the short‐run and long‐run relationship between three important macroeconomic indicators—income inequality, economic growth and financial depth. We utilise a two‐step procedure of ARDL bounds and Granger causality for the analysis. The bounds test indicates the presence of a cointegrating relationship between income inequality, financial depth and economic growth in the long run. In the second step, we utilise the Granger causality approach. Results show a bidirectional causality between financial depth‐growth and a unidirectional causality between inequality‐growth in the short run. In the long run, results reveal that growth and financial depth determine Gini. Our findings provide support for the inequality‐widening effect due to economic growth and higher credit provided to the private sector. We find no evidence of inequality‐narrowing or income‐equalising effect in the long run for the period of study. It is possible that the government's inclusive growth policies which started less than a decade ago have not taken effect for us to capture the inverted U‐shape income equalising effect significantly.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114938010","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}
M. Donadelli, Luca Gerotto, M. Lucchetta, Daniela Arzu
This paper examines the macroeconomic effects of rising migration uncertainty in four advanced economies (i.e. US, UK, Germany and France). Migration uncertainty is first captured by the Migration Policy Uncertainty (MPUI) and the Migration Fear (MFI) news‐based indexes developed by Baker et al. (Immigration fears and policy uncertainty, 2015), and then by a novel Google Trend Migration Uncertainty Index (GTMU) based on the frequency of Internet searches for the term ‘immigration’. VAR investigations suggest that the macroeconomic implications of rising migration uncertainty differ across countries. Moreover, news‐based and Google search‐based migration fear shocks generate different macroeconomic effects. For instance, in the US (France), MPUI, MFI and GTMU shocks all improve (undermine) production and labour market conditions in the medium run. For Germany and the UK, mixed evidence is found, suggesting that increasing media attention on migration phenomena and rising population's interest in migration‐related issues influence people's mood differently. The observed heterogeneity in the macroeconomic effects of rising migration uncertainty can be explained by cross‐country gaps in (a) the level of labour market rigidity, (b) the degree of people's happiness and life satisfaction and (c) the percentage of graduates.
{"title":"Immigration, Uncertainty and Macroeconomic Dynamics","authors":"M. Donadelli, Luca Gerotto, M. Lucchetta, Daniela Arzu","doi":"10.1111/twec.12865","DOIUrl":"https://doi.org/10.1111/twec.12865","url":null,"abstract":"This paper examines the macroeconomic effects of rising migration uncertainty in four advanced economies (i.e. US, UK, Germany and France). Migration uncertainty is first captured by the Migration Policy Uncertainty (MPUI) and the Migration Fear (MFI) news‐based indexes developed by Baker et al. (Immigration fears and policy uncertainty, 2015), and then by a novel Google Trend Migration Uncertainty Index (GTMU) based on the frequency of Internet searches for the term ‘immigration’. VAR investigations suggest that the macroeconomic implications of rising migration uncertainty differ across countries. Moreover, news‐based and Google search‐based migration fear shocks generate different macroeconomic effects. For instance, in the US (France), MPUI, MFI and GTMU shocks all improve (undermine) production and labour market conditions in the medium run. For Germany and the UK, mixed evidence is found, suggesting that increasing media attention on migration phenomena and rising population's interest in migration‐related issues influence people's mood differently. The observed heterogeneity in the macroeconomic effects of rising migration uncertainty can be explained by cross‐country gaps in (a) the level of labour market rigidity, (b) the degree of people's happiness and life satisfaction and (c) the percentage of graduates.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132471134","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}
Research based on the gravity model has shown that non‐economic factors affect international trade, and recent studies have shown that people's perception affects economic exchange. In this study, we explore the effects of attitudes on bilateral trade. Using survey data from the Pew Research Center's Global Attitudes Projects for 68 countries from 2002 to 2015, we find that a more favourable attitude of a country towards another country will increase the former country's imports from the latter. The result is robust to an endogeneity check, to different measures of attitudes and to different estimation methods. However, heterogeneity is observed across different types of goods and countries. The result holds for trade in intermediate and consumer goods, but the effects are not statistically significant for capital goods. The effects are statistically significant for bilateral trade between different country groups, except for high‐income countries' imports from non‐high‐income countries.
{"title":"The Effects of Bilateral Attitudes on Imports","authors":"Xiaohua Bao, Qing Liu, Larry D. Qiu, Daming Zhu","doi":"10.1111/twec.12867","DOIUrl":"https://doi.org/10.1111/twec.12867","url":null,"abstract":"Research based on the gravity model has shown that non‐economic factors affect international trade, and recent studies have shown that people's perception affects economic exchange. In this study, we explore the effects of attitudes on bilateral trade. Using survey data from the Pew Research Center's Global Attitudes Projects for 68 countries from 2002 to 2015, we find that a more favourable attitude of a country towards another country will increase the former country's imports from the latter. The result is robust to an endogeneity check, to different measures of attitudes and to different estimation methods. However, heterogeneity is observed across different types of goods and countries. The result holds for trade in intermediate and consumer goods, but the effects are not statistically significant for capital goods. The effects are statistically significant for bilateral trade between different country groups, except for high‐income countries' imports from non‐high‐income countries.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127949861","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 examines the formation of bilateral free trade agreements (FTAs) on the basis of country heterogeneity in the tariff level. We demonstrate that a country's unilateral incentive to form an FTA depends on the relative magnitudes of the (negative) market concession effect and the (positive) market expansion effect, both of which are determined by the tariff levels of the two FTA partner countries. Global welfare is maximised when all country pairs form FTAs. Two countries in equilibrium are more likely to form an FTA when their tariff gap is smaller or when their tariff levels are neither very high nor very low. This finding is robust to several extensions of the model. Our preliminary empirical analysis provides some evidence for the finding.
{"title":"Tariffs and Formation of Free Trade Agreements Networks","authors":"Jung Hur, Larry D. Qiu","doi":"10.1111/twec.12868","DOIUrl":"https://doi.org/10.1111/twec.12868","url":null,"abstract":"This paper examines the formation of bilateral free trade agreements (FTAs) on the basis of country heterogeneity in the tariff level. We demonstrate that a country's unilateral incentive to form an FTA depends on the relative magnitudes of the (negative) market concession effect and the (positive) market expansion effect, both of which are determined by the tariff levels of the two FTA partner countries. Global welfare is maximised when all country pairs form FTAs. Two countries in equilibrium are more likely to form an FTA when their tariff gap is smaller or when their tariff levels are neither very high nor very low. This finding is robust to several extensions of the model. Our preliminary empirical analysis provides some evidence for the finding.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130994251","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 investigates the extent to which access to credit, public financial incentives and tax financial incentives affect export performance using the EU‐EFIGE/Bruegel‐Unicredit data set, covering firms within Austria, France, Germany, Italy, Spain, Hungary and the UK during the 2008 global financial crisis. The results show that firms receiving credit or benefiting from public financial incentives display higher export intensity and export a greater number of product lines compared to those that did not, especially in countries with better access to credit and/or financial incentives during the crisis. Further, firms benefiting from tax financial incentives show a better export performance compared to those that did not, regardless of the degree of access to credit and/or financial incentives in the country in which they operate. In addition, the effect of access to credit and public finance incentives on export performance is found to be size‐dependent, while the effect of tax financial incentives is not. We suggest that governments should promote publicly funded financial incentives along with conventional schemes, such as R&D subsidies, to promote exports, particularly during a period of financial crisis.
{"title":"Bank Credit, Public Financial Incentives, Tax Financial Incentives and Export Performance During the Global Financial Crisis","authors":"L. Okafor, Mita Bhattacharya, N. Apergis","doi":"10.1111/twec.12848","DOIUrl":"https://doi.org/10.1111/twec.12848","url":null,"abstract":"This paper investigates the extent to which access to credit, public financial incentives and tax financial incentives affect export performance using the EU‐EFIGE/Bruegel‐Unicredit data set, covering firms within Austria, France, Germany, Italy, Spain, Hungary and the UK during the 2008 global financial crisis. The results show that firms receiving credit or benefiting from public financial incentives display higher export intensity and export a greater number of product lines compared to those that did not, especially in countries with better access to credit and/or financial incentives during the crisis. Further, firms benefiting from tax financial incentives show a better export performance compared to those that did not, regardless of the degree of access to credit and/or financial incentives in the country in which they operate. In addition, the effect of access to credit and public finance incentives on export performance is found to be size‐dependent, while the effect of tax financial incentives is not. We suggest that governments should promote publicly funded financial incentives along with conventional schemes, such as R&D subsidies, to promote exports, particularly during a period of financial crisis.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129693813","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 investigates the effects of input trade liberalisation on firm markups and assesses how institutional environment affects such impacts by using Chinese firm‐level data. To identify the causal effects, we exploit the quasi‐natural experiment of China's WTO accession in 2001 and perform difference‐in‐differences estimation. The results show that input tariff liberalisation leads to a substantial increase in firm markups, and institutional environment significantly strengthens such an impact. We further uncover the underlying mechanisms through which input tariff liberalisation boosts firm markups, and show that both price and cost channels work for the input tariff cut effect on firm markups, of which the latter is much more important. In addition, we also demonstrate that input tariff cut significantly fosters aggregate markup growth, and the reallocation effect is found to be an important channel through which input tariff liberalisation boosts aggregate markup growth.
{"title":"Input Trade Liberalisation, Institution and Markup: Evidence from China's Accession to the WTO","authors":"Qilin Mao, Jiayun Xu","doi":"10.1111/twec.12872","DOIUrl":"https://doi.org/10.1111/twec.12872","url":null,"abstract":"This paper investigates the effects of input trade liberalisation on firm markups and assesses how institutional environment affects such impacts by using Chinese firm‐level data. To identify the causal effects, we exploit the quasi‐natural experiment of China's WTO accession in 2001 and perform difference‐in‐differences estimation. The results show that input tariff liberalisation leads to a substantial increase in firm markups, and institutional environment significantly strengthens such an impact. We further uncover the underlying mechanisms through which input tariff liberalisation boosts firm markups, and show that both price and cost channels work for the input tariff cut effect on firm markups, of which the latter is much more important. In addition, we also demonstrate that input tariff cut significantly fosters aggregate markup growth, and the reallocation effect is found to be an important channel through which input tariff liberalisation boosts aggregate markup growth.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122722198","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}
Foreign direct investment (FDI) statistics are widely used to study the impact of international capital movements and multinational enterprise (MNE) activities. FDI intensity is also an important indicator of globalisation and economic integration. Datasets spanning long time periods and with broad country coverage have been employed in numerous studies to analyse various aspects of the determinants and consequences of FDI. Focusing on a relatively homogeneous group of six Western European EU countries, the present study finds major inconsistencies in the construction and coverage of these data both through time and across countries, leading to large discrepancies. Asymmetries will be far greater for broader groups of more economically and institutionally diverse countries. This study recommends extreme caution in drawing conclusions based on FDI data.
{"title":"Pitfalls in the Use of Foreign Direct Investment Statistics","authors":"C. O’Mahony, F. Barry","doi":"10.1111/twec.12836","DOIUrl":"https://doi.org/10.1111/twec.12836","url":null,"abstract":"Foreign direct investment (FDI) statistics are widely used to study the impact of international capital movements and multinational enterprise (MNE) activities. FDI intensity is also an important indicator of globalisation and economic integration. Datasets spanning long time periods and with broad country coverage have been employed in numerous studies to analyse various aspects of the determinants and consequences of FDI. Focusing on a relatively homogeneous group of six Western European EU countries, the present study finds major inconsistencies in the construction and coverage of these data both through time and across countries, leading to large discrepancies. Asymmetries will be far greater for broader groups of more economically and institutionally diverse countries. This study recommends extreme caution in drawing conclusions based on FDI data.","PeriodicalId":348861,"journal":{"name":"Wiley-Blackwell: World Economy","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127808000","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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