Over the past few years, external debt positions of South Asian economies have increased to alarming levels, indicating that those countries are more likely to be exposed to a debt crisis. Given the low domestic savings rate of these economies, they are increasingly compelled to invest significant resources in public infrastructure in order to maintain sustainable growth momentum. At the same time, those countries are invited to enrich by integrating with global synergies in the fields of maritime, trade, and financial initiatives. However, as the recent controversy over the debt-growth association is inconclusive to date; preserving the external debt exposures at an optimal level is incumbent. Consequently, this study reviews annual observations of independent cross-sections of South Asia during the period 1981-2017 in order to find the external debt-growth relationship. In addition, the quantitative research strategy used to measure the expected outcomes primarily consists of panel ARDL specifications. On aggregate levels of data, the results suggest that there is a statistically significant negative association between external debt and economic growth. Also, it has been observed that a significant nonlinear relationship exists in relation to lower-middle income countries.
{"title":"The Nexus among External Debt and Economic Growth: Evidence from South Asia","authors":"Sasindu Wanniarachchi","doi":"10.2139/ssrn.3696553","DOIUrl":"https://doi.org/10.2139/ssrn.3696553","url":null,"abstract":"Over the past few years, external debt positions of South Asian economies have increased to alarming levels, indicating that those countries are more likely to be exposed to a debt crisis. Given the low domestic savings rate of these economies, they are increasingly compelled to invest significant resources in public infrastructure in order to maintain sustainable growth momentum. At the same time, those countries are invited to enrich by integrating with global synergies in the fields of maritime, trade, and financial initiatives. However, as the recent controversy over the debt-growth association is inconclusive to date; preserving the external debt exposures at an optimal level is incumbent. Consequently, this study reviews annual observations of independent cross-sections of South Asia during the period 1981-2017 in order to find the external debt-growth relationship. In addition, the quantitative research strategy used to measure the expected outcomes primarily consists of panel ARDL specifications. On aggregate levels of data, the results suggest that there is a statistically significant negative association between external debt and economic growth. Also, it has been observed that a significant nonlinear relationship exists in relation to lower-middle income countries.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116523508","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}
Government does lots of redistribution along with expenditures for defense, education, etc. Government imposes income taxes to finance these activities. Income taxation can be done to raise revenue in a simple transparent way. Here’s a suggested scheme.
{"title":"Taxes: A Simple Scheme","authors":"E. Fama","doi":"10.2139/ssrn.3403779","DOIUrl":"https://doi.org/10.2139/ssrn.3403779","url":null,"abstract":"Government does lots of redistribution along with expenditures for defense, education, etc. Government imposes income taxes to finance these activities. Income taxation can be done to raise revenue in a simple transparent way. Here’s a suggested scheme.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122761320","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}
Since 2000, there have been three major global slowdowns, with the latest and most pronounced episode triggered by the COVID-19 pandemic. At the same time, many countries have faced major adverse events including natural disasters, wars, and financial crises, all of which can lead to long-lasting harm to productivity. Wars inflict particularly severe damage to productivity, while financial crises also lead to substantial losses, especially accompanied by a rapid build-up of debt. The greater frequency of natural disasters, especially climate disasters, means that they have the largest aggregate impact on productivity, as natural disasters have occurred most often and their frequency has doubled since 2000. Global adverse events can have large sustained negative effects on productivity through dislocating labor, tightening of credit, disrupting value chains, and decreasing innovation. Policies to counter the negative consequences of adverse shocks include accommodative fiscal policies, such as reconstruction spending on resilient infrastructure; transparent governance; efficient use of relief funds; as well as growth-friendly structural reforms. Appropriate policies and regulations concerning finance, construction, and environmental protection can help reduce the frequency of adverse shocks.
{"title":"Implications of Major Adverse Events on Productivity","authors":"A. Dieppe, Sinem Kilic Celik, Cédric Okou","doi":"10.2139/ssrn.3699683","DOIUrl":"https://doi.org/10.2139/ssrn.3699683","url":null,"abstract":"Since 2000, there have been three major global slowdowns, with the latest and most pronounced episode triggered by the COVID-19 pandemic. At the same time, many countries have faced major adverse events including natural disasters, wars, and financial crises, all of which can lead to long-lasting harm to productivity. Wars inflict particularly severe damage to productivity, while financial crises also lead to substantial losses, especially accompanied by a rapid build-up of debt. The greater frequency of natural disasters, especially climate disasters, means that they have the largest aggregate impact on productivity, as natural disasters have occurred most often and their frequency has doubled since 2000. Global adverse events can have large sustained negative effects on productivity through dislocating labor, tightening of credit, disrupting value chains, and decreasing innovation. Policies to counter the negative consequences of adverse shocks include accommodative fiscal policies, such as reconstruction spending on resilient infrastructure; transparent governance; efficient use of relief funds; as well as growth-friendly structural reforms. Appropriate policies and regulations concerning finance, construction, and environmental protection can help reduce the frequency of adverse shocks.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"429 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126091432","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}
Short-time work is a labor market policy that subsidizes working time reductions among firms in financial difficulty to prevent layoffs. Many OECD countries have used this policy in the Great Recession. This paper shows that the effects of short-time work are strongly time dependent and non-linear over the business cycle. It may save up to 0.8 jobs per short-time worker in deep economic crises. The policy becomes more efficient as the recession deepens. In expansions, the effects are smaller and may turn negative. We disentangle discretionary short-time work from automatic stabilization in German data using smooth transition VARs.
{"title":"Counteracting Unemployment in Crises: Non-Linear Effects of Short-Time Work Policy","authors":"Britta Gehrke, Brigitte Hochmuth","doi":"10.1111/SJOE.12395","DOIUrl":"https://doi.org/10.1111/SJOE.12395","url":null,"abstract":"Short-time work is a labor market policy that subsidizes working time reductions among firms in financial difficulty to prevent layoffs. Many OECD countries have used this policy in the Great Recession. This paper shows that the effects of short-time work are strongly time dependent and non-linear over the business cycle. It may save up to 0.8 jobs per short-time worker in deep economic crises. The policy becomes more efficient as the recession deepens. In expansions, the effects are smaller and may turn negative. We disentangle discretionary short-time work from automatic stabilization in German data using smooth transition VARs.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128993724","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 realm of international taxation, one of the most important contemporary issues to be addressed, from a political as well as from a technical perspective, is the question whether the arm’s length standard should be preserved as the paradigm for international transfer pricing, or whether we need a new measuring-rod (i.e. formulary apportionment) for an “appropriate” allocation of the tax base between the different jurisdictions.
What is intriguing about the arm's length standard vs. formulary apportionment debate is that it is ongoing for decades. One of the most vivid confrontations can be found in the 1983 Supreme Court Case ‘Container Corporation of America v. Franchise Tax Board’. As will be shown in this paper, many of the arguments exchanged in ‘Container v. Franchise Tax Board’ remain valid for the contemporary discussion - as the question of a taxable nexus as well as the question of a “fair” taxation in a national context are addressed. It will also be instructive to consider the 1983 perspective on double-taxation resulting from a simultaneous application of formulary apportionment by one jurisdiction while other jurisdictions adhere to the arm's length standard.
{"title":"On the Lessons to Be Learned From the 1983 Supreme Court Case ‘Container Corporation of America v. Franchise Tax Board’ for the Discussion of International Taxation in 2020","authors":"O. Treidler","doi":"10.2139/ssrn.3676190","DOIUrl":"https://doi.org/10.2139/ssrn.3676190","url":null,"abstract":"In the realm of international taxation, one of the most important contemporary issues to be addressed, from a political as well as from a technical perspective, is the question whether the arm’s length standard should be preserved as the paradigm for international transfer pricing, or whether we need a new measuring-rod (i.e. formulary apportionment) for an “appropriate” allocation of the tax base between the different jurisdictions. <br><br>What is intriguing about the arm's length standard vs. formulary apportionment debate is that it is ongoing for decades. One of the most vivid confrontations can be found in the 1983 Supreme Court Case ‘Container Corporation of America v. Franchise Tax Board’. As will be shown in this paper, many of the arguments exchanged in ‘Container v. Franchise Tax Board’ remain valid for the contemporary discussion - as the question of a taxable nexus as well as the question of a “fair” taxation in a national context are addressed. It will also be instructive to consider the 1983 perspective on double-taxation resulting from a simultaneous application of formulary apportionment by one jurisdiction while other jurisdictions adhere to the arm's length standard.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"2018 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128045084","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}
Courts have long held the utmost respect for tax laws, reflecting a recognition that the revenue-raising function of taxes allows legislators to distribute the burden of funding the government as they see fit. Unelected judges, the sentiment goes, should thus be hesitant to trifle with tax laws. However, taxes are also used to regulate individual behavior, but in such cases, rather than protect individuals’ rights as they would in the case of direct regulations, courts continue to defer to the institutional interests in taxation. The problems with this approach are highlighted by state-level controlled substance taxes, which impose taxes on individuals engaging in the criminal possession and sale of illegal drugs without providing those individuals the protections of the criminal law. Courts need a new framework for determining the amount of deference such insidious regulatory taxes are owed in order to remove the incentive for legislators to utilize tax laws to skirt important legal protections for members of society, and this Article taps modern tax expenditure analysis to provide such a framework.
{"title":"Crack Taxes and the Dangers of Insidious Regulatory Taxes","authors":"H. Holderness","doi":"10.2139/ssrn.3665440","DOIUrl":"https://doi.org/10.2139/ssrn.3665440","url":null,"abstract":"Courts have long held the utmost respect for tax laws, reflecting a recognition that the revenue-raising function of taxes allows legislators to distribute the burden of funding the government as they see fit. Unelected judges, the sentiment goes, should thus be hesitant to trifle with tax laws. However, taxes are also used to regulate individual behavior, but in such cases, rather than protect individuals’ rights as they would in the case of direct regulations, courts continue to defer to the institutional interests in taxation. The problems with this approach are highlighted by state-level controlled substance taxes, which impose taxes on individuals engaging in the criminal possession and sale of illegal drugs without providing those individuals the protections of the criminal law. Courts need a new framework for determining the amount of deference such insidious regulatory taxes are owed in order to remove the incentive for legislators to utilize tax laws to skirt important legal protections for members of society, and this Article taps modern tax expenditure analysis to provide such a framework.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115498310","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 : 2020-07-01DOI: 10.5089/9781513549200.001
Luiza Antoun de Almeida, T. Tressel
This paper studies the evolution of non-financial corporate debt among publicly listed companies in major advanced economies between 2010 and 2017. Since 2010, firms have started to rely more on corporate bond markets and have used part of their debt to increase their holdings of cash. In our sample of some 5,000 firms, we find substantial differences across countries, industries, firms, and years in leverage and debt maturity, and we also identify time factors that are common drivers of capital structures. Within countries, loosening an index of financial conditions seems to be associated with lengthening debt maturity after controlling for firms’ characteristics. Across firms and countries, leveraging and lengthening debt maturity have been greater where economic growth was stronger. Tighter financial conditions are positively associated with an increase in short-term debt financing. Quantile regressions suggest that there is substantial heterogeneity among firms on how they react to macro-financial conditions: large increases in long-term debt financing and large declines in short-term debt financing tend to be driven more by better macroeconomic performance, while large increases in short-term debt financing are more strongly impacted by tighter financial conditions. Since the paper uses data up to 2017, it does not reflect developments that occurred during the coronavirus pandemic. Nonetheless, sensitivity analysis shows that a significant amount of corporate debt, representing more than 5 percent of GDP, could be at risk in some countries, with an adverse spillover to the financial system if financial conditions tighten or economic growth slows down. This suggests that vulnerabilities should be closely monitored and policy action taken if warranted.
{"title":"Non-Financial Corporate Debt in Advanced Economies, 2010-17","authors":"Luiza Antoun de Almeida, T. Tressel","doi":"10.5089/9781513549200.001","DOIUrl":"https://doi.org/10.5089/9781513549200.001","url":null,"abstract":"This paper studies the evolution of non-financial corporate debt among publicly listed companies in major advanced economies between 2010 and 2017. Since 2010, firms have started to rely more on corporate bond markets and have used part of their debt to increase their holdings of cash. In our sample of some 5,000 firms, we find substantial differences across countries, industries, firms, and years in leverage and debt maturity, and we also identify time factors that are common drivers of capital structures. Within countries, loosening an index of financial conditions seems to be associated with lengthening debt maturity after controlling for firms’ characteristics. Across firms and countries, leveraging and lengthening debt maturity have been greater where economic growth was stronger. Tighter financial conditions are positively associated with an increase in short-term debt financing. Quantile regressions suggest that there is substantial heterogeneity among firms on how they react to macro-financial conditions: large increases in long-term debt financing and large declines in short-term debt financing tend to be driven more by better macroeconomic performance, while large increases in short-term debt financing are more strongly impacted by tighter financial conditions. Since the paper uses data up to 2017, it does not reflect developments that occurred during the coronavirus pandemic. Nonetheless, sensitivity analysis shows that a significant amount of corporate debt, representing more than 5 percent of GDP, could be at risk in some countries, with an adverse spillover to the financial system if financial conditions tighten or economic growth slows down. This suggests that vulnerabilities should be closely monitored and policy action taken if warranted.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124895007","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}
How do near-zero deposit rates affect (optimal) bank capital regulation and risk taking? I study these questions in a tractable, dynamic equilibrium model, in which forward-looking banks compete imperfectly for deposit funding, subject to a (zero) lower bound constraint on deposit rates (ZLB). At the ZLB, capital requirements become less effective in curbing excessive risk-taking incentives, as they disproportionately hurt franchise values. As a consequence, optimal dynamic capital requirements vary with the level of interest rates if the ZLB binds occasionally. Subsidizing bank funding costs at the ZLB dampens risk-taking, but may reduce overall welfare.
{"title":"Bank Capital Regulation in a Zero Interest Environment","authors":"Robin Döttling","doi":"10.2139/ssrn.3123044","DOIUrl":"https://doi.org/10.2139/ssrn.3123044","url":null,"abstract":"How do near-zero deposit rates affect (optimal) bank capital regulation and risk taking? I study these questions in a tractable, dynamic equilibrium model, in which forward-looking banks compete imperfectly for deposit funding, subject to a (zero) lower bound constraint on deposit rates (ZLB). At the ZLB, capital requirements become less effective in curbing excessive risk-taking incentives, as they disproportionately hurt franchise values. As a consequence, optimal dynamic capital requirements vary with the level of interest rates if the ZLB binds occasionally. Subsidizing bank funding costs at the ZLB dampens risk-taking, but may reduce overall welfare.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126632630","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 : 2020-05-01DOI: 10.5089/9781513545370.001
A. Hosny
Foreign holdings of domestic debt instruments in Nigeria have been increasing. Using data over 2007M1-2019M1, we show that, on average, global factors (global interest rates, oil prices) seem to carry more weight than domestic factors (treasury bills rate and domestic risk) in foreign portfolio invetsors’ decisions in Nigeria. Specifically, we show that foreign participation is, in the long run, positively correlated with oil prices and profitable rates of return on local-currency instruments, but negatively correlated with exchange rate depreciation pressures. In the short run, oil prices, opportunity cost of funds and perception of Nigeria-specific risks also play a role. These results highlight the volatile short-term nature of such flows and call for a package of policy reforms to attract longer term direct investments.
{"title":"Non-Resident Holdings of Domestic Debt in Nigeria: Internal or External Driven?","authors":"A. Hosny","doi":"10.5089/9781513545370.001","DOIUrl":"https://doi.org/10.5089/9781513545370.001","url":null,"abstract":"Foreign holdings of domestic debt instruments in Nigeria have been increasing. Using data over 2007M1-2019M1, we show that, on average, global factors (global interest rates, oil prices) seem to carry more weight than domestic factors (treasury bills rate and domestic risk) in foreign portfolio invetsors’ decisions in Nigeria. Specifically, we show that foreign participation is, in the long run, positively correlated with oil prices and profitable rates of return on local-currency instruments, but negatively correlated with exchange rate depreciation pressures. In the short run, oil prices, opportunity cost of funds and perception of Nigeria-specific risks also play a role. These results highlight the volatile short-term nature of such flows and call for a package of policy reforms to attract longer term direct investments.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125548842","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 study examines when and how tax reform impacts the pricing of IPOs. Using the Tax Cuts and Jobs Act of 2017 (TCJA), we examine IPO pricing during the periods of anticipated and post-tax reform. First, we document that firms completing an IPO following the passage of the TCJA experience an increase in valuation. The increase in valuation is significantly lower for firms with net deferred tax assets and U.S. based multinational firms, consistent with those firms benefiting less from the reform. Second, we fail to document an increase in valuation for firms completing their IPO during the period of anticipated tax reform. We further observe that firms did not experience an increased probability of an upward pricing revision during the book-building process during this period, suggesting that the IPO market was unwilling to impound the benefits of anticipated tax reform into offer prices until enactment. This result contrasts with research on the pricing of tax reform for existing publicly traded stock, where prices impound the anticipated benefits from tax reform, far in advance of enactment.
{"title":"Taxes and IPO Pricing: Evidence from U.S. Tax Reform","authors":"A. Edwards, Michelle Hutchens","doi":"10.2139/ssrn.3582280","DOIUrl":"https://doi.org/10.2139/ssrn.3582280","url":null,"abstract":"This study examines when and how tax reform impacts the pricing of IPOs. Using the Tax Cuts and Jobs Act of 2017 (TCJA), we examine IPO pricing during the periods of anticipated and post-tax reform. First, we document that firms completing an IPO following the passage of the TCJA experience an increase in valuation. The increase in valuation is significantly lower for firms with net deferred tax assets and U.S. based multinational firms, consistent with those firms benefiting less from the reform. Second, we fail to document an increase in valuation for firms completing their IPO during the period of anticipated tax reform. We further observe that firms did not experience an increased probability of an upward pricing revision during the book-building process during this period, suggesting that the IPO market was unwilling to impound the benefits of anticipated tax reform into offer prices until enactment. This result contrasts with research on the pricing of tax reform for existing publicly traded stock, where prices impound the anticipated benefits from tax reform, far in advance of enactment.","PeriodicalId":119398,"journal":{"name":"Political Economy - Development: Fiscal & Monetary Policy eJournal","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125639942","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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