Pub Date : 2025-09-01DOI: 10.1016/j.jinteco.2025.104128
Jingting Fan , Lei Li
Imported capital goods, which embody skill-complementary technologies, can increase the supply of skills in developing countries. Focusing on China and using a shift-share design, we show that city-level capital goods import growth increases the local skill share and that both skill acquisition and migration play a role. We develop and quantify a spatial equilibrium model with these two mechanisms to examine the aggregate effects of capital goods imports, accounting for trade and migration linkages between cities. Counterfactual experiments suggest that the growth in capital goods imports in China between 2000 and 2010 led to a 3.1–7.3 million increase in the stock of college graduates, representing 4.4–10.4% of the total increase over this period, with the increase disproportionately occurring in coastal regions. These endogenous skill supply responses reduce by half the increase in the aggregate skill premium due to capital goods imports.
{"title":"Skill-biased imports, skill acquisition, and migration","authors":"Jingting Fan , Lei Li","doi":"10.1016/j.jinteco.2025.104128","DOIUrl":"10.1016/j.jinteco.2025.104128","url":null,"abstract":"<div><div>Imported capital goods, which embody skill-complementary technologies, can increase the supply of skills in developing countries. Focusing on China and using a shift-share design, we show that city-level capital goods import growth increases the local skill share and that both skill acquisition and migration play a role. We develop and quantify a spatial equilibrium model with these two mechanisms to examine the aggregate effects of capital goods imports, accounting for trade and migration linkages between cities. Counterfactual experiments suggest that the growth in capital goods imports in China between 2000 and 2010 led to a 3.1–7.3 million increase in the stock of college graduates, representing 4.4–10.4% of the total increase over this period, with the increase disproportionately occurring in coastal regions. These endogenous skill supply responses reduce by half the increase in the aggregate skill premium due to capital goods imports.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104128"},"PeriodicalIF":4.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper uses data on the near universe of job adverts posted online in the US to study the impact of the 2018 trade war on US job opportunities. We develop measures of labor market exposure to three key channels of impact from the trade war: import protection for US producers, the higher cost of imported inputs for US producers, and exposure of US exporters to retaliatory tariffs. We find evidence that both tariffs on imported inputs and retaliatory tariffs led to a relative decline in online job postings in affected commuting zones. The effects of imported input tariffs were stronger for lower skilled postings than for higher skill postings and for part-time than full-time jobs. By contrast, we do not find any evidence of positive impacts of import protection on job openings. We estimate that the tariffs led to a combined effect of 162,019 fewer job postings in 2018, or 0.6 percent of the US total.
{"title":"Did the 2018 trade war improve job opportunities for US workers?","authors":"Beata Javorcik , Benjamin Kett , Katherine Stapleton , Layla O’Kane","doi":"10.1016/j.jinteco.2025.104125","DOIUrl":"10.1016/j.jinteco.2025.104125","url":null,"abstract":"<div><div>This paper uses data on the near universe of job adverts posted online in the US to study the impact of the 2018 trade war on US job opportunities. We develop measures of labor market exposure to three key channels of impact from the trade war: import protection for US producers, the higher cost of imported inputs for US producers, and exposure of US exporters to retaliatory tariffs. We find evidence that both tariffs on imported inputs and retaliatory tariffs led to a relative decline in online job postings in affected commuting zones. The effects of imported input tariffs were stronger for lower skilled postings than for higher skill postings and for part-time than full-time jobs. By contrast, we do not find any evidence of positive impacts of import protection on job openings. We estimate that the tariffs led to a combined effect of 162,019 fewer job postings in 2018, or 0.6 percent of the US total.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"158 ","pages":"Article 104125"},"PeriodicalIF":4.0,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-23DOI: 10.1016/j.jinteco.2025.104144
Aitor Irastorza-Fadrique , Peter Levell , Matthias Parey
We study the impact of Chinese import competition in the 2000s on workers and their households in England and Wales. We document both the direct employment changes of individuals affected by trade exposure, as well as the employment response of individuals whose partner is exposed to trade. We find substantial differences by gender. Men respond to import competition by increasing labour force participation at older ages, and by moving into self-employment. This is true both in response to their own trade exposure, and as an ‘added worker effect’ when their partner is exposed to the shock. By contrast, we find no such response for women, who do not increase labour supply following shocks affecting their partners. Male workers exposed to import competition largely enter self-employed jobs in historically male-dominated occupations, as do men reacting to shocks affecting their partners.
{"title":"Household responses to trade shocks","authors":"Aitor Irastorza-Fadrique , Peter Levell , Matthias Parey","doi":"10.1016/j.jinteco.2025.104144","DOIUrl":"10.1016/j.jinteco.2025.104144","url":null,"abstract":"<div><div>We study the impact of Chinese import competition in the 2000s on workers and their households in England and Wales. We document both the direct employment changes of individuals affected by trade exposure, as well as the employment response of individuals whose partner is exposed to trade. We find substantial differences by gender. Men respond to import competition by increasing labour force participation at older ages, and by moving into self-employment. This is true both in response to their own trade exposure, and as an ‘added worker effect’ when their partner is exposed to the shock. By contrast, we find no such response for women, who do not increase labour supply following shocks affecting their partners. Male workers exposed to import competition largely enter self-employed jobs in historically male-dominated occupations, as do men reacting to shocks affecting their partners.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104144"},"PeriodicalIF":4.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-22DOI: 10.1016/j.jinteco.2025.104143
Utsa Banerjee , Luis Castro Peñarrieta , Pavel Chakraborty
Do firms reorganize gender composition of their employment in response to trade shocks? Using novel data on gender composition of employment across several occupational groups for Chilean manufacturing firms matched with customs data for 1995–2007, a developing country with low gender equality, and utilizing the 1998 Chile–Mexico Free Trade Agreement (FTA) as the quasi-natural shock, we document the first evidence that the share of female white-collar workers increased by 10% for new exporters exporting to Mexico due to the FTA. This happened through a substitution effect from male to female high-skilled workers due to higher use of technology (both domestic and foreign), high-skilled non-production tasks, and reduction in discrimination. We also show that this increase in this share of white-collar female workers is due to a demand- rather than supply-side effect. Overall, we emphasize that trade policy can play an important role in addressing the gender gap in employment.
{"title":"Can trade policy change gender equality? Evidence from Chile","authors":"Utsa Banerjee , Luis Castro Peñarrieta , Pavel Chakraborty","doi":"10.1016/j.jinteco.2025.104143","DOIUrl":"10.1016/j.jinteco.2025.104143","url":null,"abstract":"<div><div>Do firms reorganize gender composition of their employment in response to trade shocks? Using novel data on gender composition of employment across several occupational groups for Chilean manufacturing firms matched with customs data for 1995–2007, a developing country with low gender equality, and utilizing the 1998 Chile–Mexico Free Trade Agreement (FTA) as the quasi-natural shock, we document the first evidence that the share of female white-collar workers increased by 10% for new exporters exporting to Mexico due to the FTA. This happened through a substitution effect from male to female high-skilled workers due to higher use of technology (both domestic and foreign), high-skilled non-production tasks, and reduction in discrimination. We also show that this increase in this share of white-collar female workers is due to a demand- rather than supply-side effect. Overall, we emphasize that trade policy can play an important role in addressing the gender gap in employment.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104143"},"PeriodicalIF":4.0,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-20DOI: 10.1016/j.jinteco.2025.104155
Jonathan Eaton , Marcela Eslava , David Jinkins , C.J. Krizan , James Tybout
Exporting is harder than selling at home, and overcoming barriers takes time. We identify key obstacles to exporting and measure their importance by developing a model of firm-level export dynamics with costly customer search, visibility effects, and learning about product appeal. Fitting the model to U.S. import data on Colombian manufactures, we replicate patterns of exporter maturation. A firm’s customer base and market knowledge are valuable intangible assets: losing both through “market amnesia” would cost Colombian exporters US$14.2 billion, over twice annual exports to the U.S. About a quarter of this reflects lost future sales to current customers; the rest stems from the cost of relearning product appeal and regaining visibility. The frictions we estimate slow trade’s response to shocks: the 10-year export sales response to an exchange rate shock is 48 percent larger than the 1-year response.
{"title":"A search and learning model of export dynamics","authors":"Jonathan Eaton , Marcela Eslava , David Jinkins , C.J. Krizan , James Tybout","doi":"10.1016/j.jinteco.2025.104155","DOIUrl":"10.1016/j.jinteco.2025.104155","url":null,"abstract":"<div><div>Exporting is harder than selling at home, and overcoming barriers takes time. We identify key obstacles to exporting and measure their importance by developing a model of firm-level export dynamics with costly customer search, visibility effects, and learning about product appeal. Fitting the model to U.S. import data on Colombian manufactures, we replicate patterns of exporter maturation. A firm’s customer base and market knowledge are valuable intangible assets: losing both through “market amnesia” would cost Colombian exporters US$14.2 billion, over twice annual exports to the U.S. About a quarter of this reflects lost future sales to current customers; the rest stems from the cost of relearning product appeal and regaining visibility. The frictions we estimate slow trade’s response to shocks: the 10-year export sales response to an exchange rate shock is 48 percent larger than the 1-year response.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104155"},"PeriodicalIF":4.0,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144913124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-15DOI: 10.1016/j.jinteco.2025.104154
Erhan Artuc , Paulo Bastos , Eunhee Lee
We study the welfare effects of international trade on workers with a new dynamic general equilibrium discrete choice model of labor mobility, where the workers’ choice set of jobs is endogenous. Introducing an endogenous number of job options is crucial for matching labor flows in data and quantifying the welfare effects of trade. We exploit differential exposure of sectors and regions to destination-specific demand shocks to estimate the impacts of exports on wages, employment, and labor mobility, using matched employer–employee panel data for Brazil. The same empirical strategy is also applied to estimate structural parameters and the different components of changes in model-implied worker welfare. Counterfactual simulations confirm that the welfare effects of trade are significantly magnified by the introduction of an endogenous number of job options.
{"title":"Trade, jobs, and worker welfare","authors":"Erhan Artuc , Paulo Bastos , Eunhee Lee","doi":"10.1016/j.jinteco.2025.104154","DOIUrl":"10.1016/j.jinteco.2025.104154","url":null,"abstract":"<div><div>We study the welfare effects of international trade on workers with a new dynamic general equilibrium discrete choice model of labor mobility, where the workers’ choice set of jobs is endogenous. Introducing an endogenous number of job options is crucial for matching labor flows in data and quantifying the welfare effects of trade. We exploit differential exposure of sectors and regions to destination-specific demand shocks to estimate the impacts of exports on wages, employment, and labor mobility, using matched employer–employee panel data for Brazil. The same empirical strategy is also applied to estimate structural parameters and the different components of changes in model-implied worker welfare. Counterfactual simulations confirm that the welfare effects of trade are significantly magnified by the introduction of an endogenous number of job options.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"158 ","pages":"Article 104154"},"PeriodicalIF":4.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-13DOI: 10.1016/j.jinteco.2025.104145
Jeffrey H. Bergstrand , Matthew W. Clance , J.M.C. Santos Silva
Although there is evidence suggesting that the effects of trade liberalizations likely vary across the distribution of trade flows, trade economists have focused almost entirely on conditional mean estimates of their trade elasticities. We propose the novel use of Poisson-based expectile regressions to estimate the heterogeneous effects of trade liberalizations across the entire conditional distribution. Like standard Poisson regression, this method does not need the dependent variable to be logged, accommodates a mass of observations at zero, and is easy to implement, allowing the estimation of gravity equations with the standard three-way fixed effects specification. Using the proposed estimator, we find systematic evidence that trade liberalizations have larger effects at the lower tail of the conditional distribution. We then use the proposed method to investigate the causes of this heterogeneity, and our results suggest that the success of trade liberalizations strongly depends on potential for expansions along the extensive margin.
{"title":"The tails of gravity: Using expectiles to quantify the trade-margins effects of economic integration agreements","authors":"Jeffrey H. Bergstrand , Matthew W. Clance , J.M.C. Santos Silva","doi":"10.1016/j.jinteco.2025.104145","DOIUrl":"10.1016/j.jinteco.2025.104145","url":null,"abstract":"<div><div>Although there is evidence suggesting that the effects of trade liberalizations likely vary across the distribution of trade flows, trade economists have focused almost entirely on <em>conditional mean</em> estimates of their trade elasticities. We propose the novel use of Poisson-based <em>expectile regressions</em> to estimate the heterogeneous effects of trade liberalizations across the entire conditional distribution. Like standard Poisson regression, this method does not need the dependent variable to be logged, accommodates a mass of observations at zero, and is easy to implement, allowing the estimation of gravity equations with the standard three-way fixed effects specification. Using the proposed estimator, we find systematic evidence that trade liberalizations have larger effects at the lower tail of the conditional distribution. We then use the proposed method to investigate the causes of this heterogeneity, and our results suggest that the success of trade liberalizations strongly depends on potential for expansions along the extensive margin.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104145"},"PeriodicalIF":4.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-13DOI: 10.1016/j.jinteco.2025.104141
Marcos Mac Mullen , Soo Kyung Woo
This paper studies the drivers of the US real exchange rate (RER), with a particular focus on its comovement with net trade (NT) flows. We consider the entire spectrum of frequencies, as the low-frequency variation accounts for 62 and 64 percent of the unconditional variance of the RER and NT, respectively. We develop a generalization of the standard international business cycle model that successfully rationalizes the joint dynamics of the RER and NT while accounting for the major puzzles of the RER. We find that, while financial shocks are necessary to capture high frequency variation in the RER, trade shocks are essential for the lower frequency fluctuations.
{"title":"Real exchange rate and net trade dynamics: Financial and trade shocks","authors":"Marcos Mac Mullen , Soo Kyung Woo","doi":"10.1016/j.jinteco.2025.104141","DOIUrl":"10.1016/j.jinteco.2025.104141","url":null,"abstract":"<div><div>This paper studies the drivers of the US real exchange rate (RER), with a particular focus on its comovement with net trade (NT) flows. We consider the entire spectrum of frequencies, as the low-frequency variation accounts for 62 and 64 percent of the unconditional variance of the RER and NT, respectively. We develop a generalization of the standard international business cycle model that successfully rationalizes the joint dynamics of the RER and NT while accounting for the major puzzles of the RER. We find that, while financial shocks are necessary to capture high frequency variation in the RER, trade shocks are essential for the lower frequency fluctuations.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104141"},"PeriodicalIF":4.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-11DOI: 10.1016/j.jinteco.2025.104142
Oliver de Groot , C. Bora Durdu , Enrique G. Mendoza
We compare global (fixed-point iteration) and local (first-order, higher-order, risky-steady-state, and quasi-linear) solutions of open-economy incomplete-markets models. Cyclical moments of a workhorse endowment model are broadly in line with the data and similar across solutions calibrated to the same data targets, but impulse responses and spectral densities differ. Alternative local solutions yield nearly identical results. Calibrating them requires nontrivial interest-rate elasticities that make net foreign assets (NFA) “sticky,” causing them to differ sharply from global solutions in experiments altering precautionary savings (e.g., increasing income volatility, adding capital controls). Analytic and numerical results show that our findings are due to the near-unit-root nature of NFA under incomplete markets and imprecise solutions of their autocorrelation. These findings extend to a Sudden Stops model with an occasionally binding collateral constraint. In addition, quasi-linear methods yield smaller financial premia and macroeconomic responses when the constraint binds.
{"title":"Why global and local solutions of open-economy models with incomplete markets differ and why it matters","authors":"Oliver de Groot , C. Bora Durdu , Enrique G. Mendoza","doi":"10.1016/j.jinteco.2025.104142","DOIUrl":"10.1016/j.jinteco.2025.104142","url":null,"abstract":"<div><div>We compare global (fixed-point iteration) and local (first-order, higher-order, risky-steady-state, and quasi-linear) solutions of open-economy incomplete-markets models. Cyclical moments of a workhorse endowment model are broadly in line with the data and similar across solutions calibrated to the same data targets, but impulse responses and spectral densities differ. Alternative local solutions yield nearly identical results. Calibrating them requires nontrivial interest-rate elasticities that make net foreign assets (NFA) “sticky,” causing them to differ sharply from global solutions in experiments altering precautionary savings (e.g., increasing income volatility, adding capital controls). Analytic and numerical results show that our findings are due to the near-unit-root nature of NFA under incomplete markets and imprecise solutions of their autocorrelation. These findings extend to a Sudden Stops model with an occasionally binding collateral constraint. In addition, quasi-linear methods yield smaller financial premia and macroeconomic responses when the constraint binds.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"158 ","pages":"Article 104142"},"PeriodicalIF":4.0,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145155650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-09DOI: 10.1016/j.jinteco.2025.104146
Jens H.E. Christensen , Nikola N. Mirkov , Xin Zhang
Through large-scale asset purchases, widely known as quantitative easing (QE), central banks around the world have affected the supply of safe assets by buying quasi-safe bonds in exchange for truly safe reserves. We examine the pricing effects of the European Central Bank’s bond purchases in the 2015–2021 period on an international panel of bond safety premia from four highly rated countries: Denmark, Germany, Sweden, and Switzerland. We find statistically significant negative effects for all four countries, highlighting an international spillover channel through which QE programs reduce bond safety premia by expanding the supply of truly safe assets.
{"title":"Quantitative easing and the supply of safe assets: Evidence from international bond safety premia","authors":"Jens H.E. Christensen , Nikola N. Mirkov , Xin Zhang","doi":"10.1016/j.jinteco.2025.104146","DOIUrl":"10.1016/j.jinteco.2025.104146","url":null,"abstract":"<div><div>Through large-scale asset purchases, widely known as quantitative easing (QE), central banks around the world have affected the supply of safe assets by buying quasi-safe bonds in exchange for truly safe reserves. We examine the pricing effects of the European Central Bank’s bond purchases in the 2015–2021 period on an international panel of bond safety premia from four highly rated countries: Denmark, Germany, Sweden, and Switzerland. We find statistically significant negative effects for all four countries, highlighting an international spillover channel through which QE programs reduce bond safety premia by expanding the supply of truly safe assets.</div></div>","PeriodicalId":16276,"journal":{"name":"Journal of International Economics","volume":"157 ","pages":"Article 104146"},"PeriodicalIF":4.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}