Pub Date : 2025-10-14DOI: 10.1016/j.jmoneco.2025.103847
Bence Bardóczy, Jae Sim, Andreas Tischbirek
We study how excess savings affect consumption and propagate through the macroeconomy, which permits us to evaluate the contribution of excess savings to post-pandemic inflation in the U.S. In partial equilibrium, the aggregate spending response depends on the initial distribution of excess savings and the cross-sectional heterogeneity in marginal propensities to consume. In general equilibrium, canonical RANK, TANK, and HANK models make markedly different predictions about the macroeconomic consequences of excess savings even if household wealth follows nearly identical paths. A quantitative HANK model matches the decumulation of the excess savings built up during the COVID-19 pandemic across the income distribution. The model attributes about a third of the trough-to-peak change in inflation to demand fueled by excess savings.
{"title":"The macroeconomic effects of excess savings","authors":"Bence Bardóczy, Jae Sim, Andreas Tischbirek","doi":"10.1016/j.jmoneco.2025.103847","DOIUrl":"10.1016/j.jmoneco.2025.103847","url":null,"abstract":"<div><div>We study how excess savings affect consumption and propagate through the macroeconomy, which permits us to evaluate the contribution of excess savings to post-pandemic inflation in the U.S. In partial equilibrium, the aggregate spending response depends on the initial distribution of excess savings and the cross-sectional heterogeneity in marginal propensities to consume. In general equilibrium, canonical RANK, TANK, and HANK models make markedly different predictions about the macroeconomic consequences of excess savings even if household wealth follows nearly identical paths. A quantitative HANK model matches the decumulation of the excess savings built up during the COVID-19 pandemic across the income distribution. The model attributes about a third of the trough-to-peak change in inflation to demand fueled by excess savings.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"156 ","pages":"Article 103847"},"PeriodicalIF":4.1,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-11DOI: 10.1016/j.jmoneco.2025.103846
Francesco Saverio Gaudio
The U.S. stock market participation rate has risen substantially since the 1980s. This paper studies the macro-financial implications of such structural change in a production-based asset-pricing model with external habits, which make investors’ effective risk aversion time-varying and decreasing with consumption. In this setup, higher participation generates a fall in the risk-free rate and an increase in the equity premium, consistent with recent U.S. trends. These novel results stem from a decline in the average participant’s risk tolerance, due to the entry of lower-consumption households relative to incumbents. Micro-level evidence from the U.S. Consumer Expenditure Survey supports the main model mechanism.
{"title":"Stock market participation and macro-financial trends","authors":"Francesco Saverio Gaudio","doi":"10.1016/j.jmoneco.2025.103846","DOIUrl":"10.1016/j.jmoneco.2025.103846","url":null,"abstract":"<div><div>The U.S. stock market participation rate has risen substantially since the 1980s. This paper studies the macro-financial implications of such structural change in a production-based asset-pricing model with external habits, which make investors’ effective risk aversion time-varying and decreasing with consumption. In this setup, higher participation generates a fall in the risk-free rate and an increase in the equity premium, consistent with recent U.S. trends. These novel results stem from a decline in the <em>average</em> participant’s risk tolerance, due to the entry of lower-consumption households relative to incumbents. Micro-level evidence from the U.S. Consumer Expenditure Survey supports the main model mechanism.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"156 ","pages":"Article 103846"},"PeriodicalIF":4.1,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-08DOI: 10.1016/j.jmoneco.2025.103844
Ryan Chahrour , Kyle Jurado
In macroeconomic models with dispersed information, agents have an incentive to learn from endogenous variables, which themselves depend on the forecasts of others. This paper revisits the model of Townsend (1983) to characterize how this mechanism affects equilibrium dynamics. The first part of the paper simplifies, revises, and extends past results about situations when prices are fully revealing. The second part shows that full revelation does not occur in the original model and proves that the equilibrium state vector is infinite-dimensional. It also provides a new numerical solution procedure for such cases, which operates entirely in the frequency domain.
{"title":"Revisiting the forecasts of others","authors":"Ryan Chahrour , Kyle Jurado","doi":"10.1016/j.jmoneco.2025.103844","DOIUrl":"10.1016/j.jmoneco.2025.103844","url":null,"abstract":"<div><div>In macroeconomic models with dispersed information, agents have an incentive to learn from endogenous variables, which themselves depend on the forecasts of others. This paper revisits the model of Townsend (1983) to characterize how this mechanism affects equilibrium dynamics. The first part of the paper simplifies, revises, and extends past results about situations when prices are fully revealing. The second part shows that full revelation does not occur in the original model and proves that the equilibrium state vector is infinite-dimensional. It also provides a new numerical solution procedure for such cases, which operates entirely in the frequency domain.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"155 ","pages":"Article 103844"},"PeriodicalIF":4.1,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-03DOI: 10.1016/j.jmoneco.2025.103845
César Barreto , Christian Merkl
Our paper documents the importance of ex ante worker heterogeneity for labor market dynamics and for the composition of the unemployment pool over the business cycle. In recessions, the unemployment pool shifts toward workers with higher wages in their previous jobs. Based on administrative data for Germany and two-way worker and firm wage fixed effects, we show that this shift is mainly connected to worker heterogeneity, not to firm heterogeneity. We calibrate a search and matching model with ex ante worker heterogeneity to the estimated relative residual wage dispersion across worker fixed-effect groups. We show that a lower idiosyncratic match-specific shock dispersion for high-wage workers is key for the larger relative fluctuations of their separation rate as well as for the positive comovement between prior wages and fixed effects of unemployed workers with aggregate unemployment. We argue that firm-based explanations, such as cyclical financial frictions, are unlikely to be key drivers for the documented empirical patterns.
{"title":"Ex ante heterogeneity, separations, and labor market dynamics","authors":"César Barreto , Christian Merkl","doi":"10.1016/j.jmoneco.2025.103845","DOIUrl":"10.1016/j.jmoneco.2025.103845","url":null,"abstract":"<div><div>Our paper documents the importance of ex ante worker heterogeneity for labor market dynamics and for the composition of the unemployment pool over the business cycle. In recessions, the unemployment pool shifts toward workers with higher wages in their previous jobs. Based on administrative data for Germany and two-way worker and firm wage fixed effects, we show that this shift is mainly connected to worker heterogeneity, not to firm heterogeneity. We calibrate a search and matching model with ex ante worker heterogeneity to the estimated relative residual wage dispersion across worker fixed-effect groups. We show that a lower idiosyncratic match-specific shock dispersion for high-wage workers is key for the larger relative fluctuations of their separation rate as well as for the positive comovement between prior wages and fixed effects of unemployed workers with aggregate unemployment. We argue that firm-based explanations, such as cyclical financial frictions, are unlikely to be key drivers for the documented empirical patterns.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"156 ","pages":"Article 103845"},"PeriodicalIF":4.1,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-01DOI: 10.1016/j.jmoneco.2025.103831
Ferre De Graeve , Andreas Westermark
Macroeconomic research often relies on structural vector autoregressions, (S)VARs, to uncover empirical regularities. Critics argue the method goes awry due to lag truncation: short lag lengths imply a poor approximation to important data-generating processes (e.g. DSGE models). Empirically, short lag length is deemed necessary as increased parametrization induces excessive uncertainty. The paper shows that this argument is incomplete. Longer lag length simultaneously reduces misspecification, which in turn reduces variance. Contrary to conventional wisdom, the trivial solution to the critique actually works. For data generated by frontier DSGE models long-lag VARs are feasible, reduce bias and variance, and have better mean-squared error. Long-lag VARs are also viable in common macroeconomic data and significantly change structural conclusions about the impact of technology and monetary policy shocks on the economy.
{"title":"Long-lag VARs","authors":"Ferre De Graeve , Andreas Westermark","doi":"10.1016/j.jmoneco.2025.103831","DOIUrl":"10.1016/j.jmoneco.2025.103831","url":null,"abstract":"<div><div>Macroeconomic research often relies on structural vector autoregressions, (S)VARs, to uncover empirical regularities. Critics argue the method goes awry due to lag truncation: short lag lengths imply a poor approximation to important data-generating processes (e.g. DSGE models). Empirically, short lag length is deemed necessary as increased parametrization induces excessive uncertainty. The paper shows that this argument is incomplete. Longer lag length simultaneously reduces misspecification, which in turn reduces variance. Contrary to conventional wisdom, the trivial solution to the critique actually works. For data generated by frontier DSGE models long-lag VARs are feasible, reduce bias and variance, and have better mean-squared error. Long-lag VARs are also viable in common macroeconomic data and significantly change structural conclusions about the impact of technology and monetary policy shocks on the economy.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"156 ","pages":"Article 103831"},"PeriodicalIF":4.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-29DOI: 10.1016/j.jmoneco.2025.103843
Christian Hellwig , Venky Venkateswaran
We study the propagation of nominal shocks in a dispersed information economy where firms learn from and respond to information generated by their activities in product and factor markets. We show that imperfect information on its own has no effect on equilibrium outcomes, when firms have the flexibility to adjust prices and output instantaneously to changes in their market conditions, an outcome that we term the “Hayekian benchmark”. With sticky prices, however, this irrelevance obtains only if there are no strategic complementarities in pricing and aggregate and idiosyncratic shocks are equally persistent. With complementarities and/or differences in persistence, the interaction of nominal and informational frictions slows down price adjustment, amplifying real effects from nominal shocks (relative to a full information model with only nominal frictions). In a calibrated model, the amplification is most pronounced over the medium to long term. In the short run, market generated information leads to substantial aggregate price adjustment, even though firms may be completely unaware of changes in aggregate conditions.
{"title":"Dispersed information, nominal rigidities and monetary business cycles: A Hayekian perspective","authors":"Christian Hellwig , Venky Venkateswaran","doi":"10.1016/j.jmoneco.2025.103843","DOIUrl":"10.1016/j.jmoneco.2025.103843","url":null,"abstract":"<div><div>We study the propagation of nominal shocks in a dispersed information economy where firms learn from and respond to information generated by their activities in product and factor markets. We show that imperfect information on its own has <em>no</em> effect on equilibrium outcomes, when firms have the flexibility to adjust prices and output instantaneously to changes in their market conditions, an outcome that we term the “Hayekian benchmark”. With sticky prices, however, this irrelevance obtains only if there are no strategic complementarities in pricing and aggregate and idiosyncratic shocks are equally persistent. With complementarities and/or differences in persistence, the interaction of nominal and informational frictions slows down price adjustment, amplifying real effects from nominal shocks (relative to a full information model with only nominal frictions). In a calibrated model, the amplification is most pronounced over the medium to long term. In the short run, market generated information leads to substantial aggregate price adjustment, even though firms may be completely unaware of changes in aggregate conditions.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"155 ","pages":"Article 103843"},"PeriodicalIF":4.1,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-24DOI: 10.1016/j.jmoneco.2025.103839
Klaus Adam , Pei Kuang , Shihan Xie
We observe a rich set of public information signals available to participants in the Survey of Professional Forecasters (SPF) and decompose individual forecast revisions into those due to public information and a remainder due to residual information. We find that SPF forecasters overreact to residual information at almost all forecast horizons and for almost all forecast variables. In addition, forecasts are overly anchored to prior beliefs for all variables at all forecast horizons. We show analytically that overconfidence in private information qualitatively generates both of these features. It also implies that forecast errors correlate positively with past forecast revisions at the consensus level, but negatively at the individual level, as documented previously in the literature. Estimating Bayesian updating models on SPF data, we show that overconfidence in private information also replicates the observed patterns quantitatively. All estimated models display strong and statistically significant overconfidence in private information.
{"title":"Overconfidence in private information explains biases in professional forecasts","authors":"Klaus Adam , Pei Kuang , Shihan Xie","doi":"10.1016/j.jmoneco.2025.103839","DOIUrl":"10.1016/j.jmoneco.2025.103839","url":null,"abstract":"<div><div>We observe a rich set of public information signals available to participants in the Survey of Professional Forecasters (SPF) and decompose individual forecast revisions into those due to public information and a remainder due to residual information. We find that SPF forecasters overreact to residual information at almost all forecast horizons and for almost all forecast variables. In addition, forecasts are overly anchored to prior beliefs for all variables at all forecast horizons. We show analytically that overconfidence in private information qualitatively generates both of these features. It also implies that forecast errors correlate positively with past forecast revisions at the consensus level, but negatively at the individual level, as documented previously in the literature. Estimating Bayesian updating models on SPF data, we show that overconfidence in private information also replicates the observed patterns quantitatively. All estimated models display strong and statistically significant overconfidence in private information.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"155 ","pages":"Article 103839"},"PeriodicalIF":4.1,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-24DOI: 10.1016/j.jmoneco.2025.103830
Effrosyni Adamopoulou , Luis Díez-Catalán , Ernesto Villanueva
We analyze the impact of downward nominal wage rigidity (DNWR) due to collective bargaining agreements (CBAs) on wage and employment dynamics during two major recessions in Spain: the low-inflation recession of 2009, which included both short- and long-term CBAs, and the high-inflation recession of 1993, characterized by short-term CBAs. By exploiting variation in the timing of CBA renewals, we find that CBAs signed before recessions result in 1pp higher negotiated wage growth than those signed afterward. We leverage balance sheet data on firms and Social Security data on workers to document that CBA-induced DNWR accounted for 12% of job losses in 2009 due to higher wage growth, mainly among workers near the minimum wage floors. These workers experienced persistent non-employment, particularly if they were covered by long-term CBAs, and reallocation was limited. We find no real impacts in 1993, thus identifying conditions under which CBA-induced DNWR can amplify aggregate shocks.
{"title":"Staggered contracts and unemployment during recessions","authors":"Effrosyni Adamopoulou , Luis Díez-Catalán , Ernesto Villanueva","doi":"10.1016/j.jmoneco.2025.103830","DOIUrl":"10.1016/j.jmoneco.2025.103830","url":null,"abstract":"<div><div>We analyze the impact of downward nominal wage rigidity (DNWR) due to collective bargaining agreements (CBAs) on wage and employment dynamics during two major recessions in Spain: the low-inflation recession of 2009, which included both short- and long-term CBAs, and the high-inflation recession of 1993, characterized by short-term CBAs. By exploiting variation in the timing of CBA renewals, we find that CBAs signed before recessions result in 1pp higher negotiated wage growth than those signed afterward. We leverage balance sheet data on firms and Social Security data on workers to document that CBA-induced DNWR accounted for 12% of job losses in 2009 due to higher wage growth, mainly among workers near the minimum wage floors. These workers experienced persistent non-employment, particularly if they were covered by long-term CBAs, and reallocation was limited. We find no real impacts in 1993, thus identifying conditions under which CBA-induced DNWR can amplify aggregate shocks.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"156 ","pages":"Article 103830"},"PeriodicalIF":4.1,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-24DOI: 10.1016/j.jmoneco.2025.103828
Sergio Rebelo , Miguel Santana , Pedro Teles
We develop a model in which households make decisions using a dual-process framework. System 1 relies on fast, intuitive heuristics but is prone to error, while System 2 demands cognitive effort but yields more accurate decisions. Monopolistic firms can influence which system households engage through pricing. This strategic influence creates a novel source of price inertia. The model accounts for the “rockets and feathers” phenomenon (prices rise quickly but fall slowly), explains why firms with unexpectedly high demand often avoid price changes, and why hazard functions are downward sloping. Our model implies that price stability is not optimal.
{"title":"Behavioral sticky prices","authors":"Sergio Rebelo , Miguel Santana , Pedro Teles","doi":"10.1016/j.jmoneco.2025.103828","DOIUrl":"10.1016/j.jmoneco.2025.103828","url":null,"abstract":"<div><div>We develop a model in which households make decisions using a dual-process framework. System 1 relies on fast, intuitive heuristics but is prone to error, while System 2 demands cognitive effort but yields more accurate decisions. Monopolistic firms can influence which system households engage through pricing. This strategic influence creates a novel source of price inertia. The model accounts for the “rockets and feathers” phenomenon (prices rise quickly but fall slowly), explains why firms with unexpectedly high demand often avoid price changes, and why hazard functions are downward sloping. Our model implies that price stability is not optimal.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"155 ","pages":"Article 103828"},"PeriodicalIF":4.1,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-23DOI: 10.1016/j.jmoneco.2025.103842
Robert M. Townsend
This essay honors the contributions of Robert E. Lucas, Jr., to the most important macro problems where informational frictions are relevant today. The first step focuses on two of Lucas’ papers where information frictions play somewhat different roles, zeroing in on the key elements: money, islands, and imperfect information. Each paper is then linked to associated branches of the literature. The second step argues that new technologies have now emerged which make those key elements all the more crucial in the macroeconomics of today. Monetary policy considerations were forefront in Lucas’ mind, and so that is a recurrent theme throughout this essay.
本文旨在表彰小罗伯特·e·卢卡斯（Robert E. Lucas, Jr.）对当今与信息摩擦相关的最重要宏观问题的贡献。第一步关注Lucas的两篇论文，在这两篇论文中，信息摩擦扮演了不同的角色，并将注意力集中在关键因素上：金钱、孤岛和不完全信息。然后将每篇论文链接到相关的文献分支。第二步认为，现在出现的新技术使这些关键因素在今天的宏观经济学中更加重要。货币政策的考虑在卢卡斯的脑海中是最重要的，所以这是贯穿这篇文章的一个反复出现的主题。
{"title":"“Information frictions in macroeconomics: The legacy of Robert E. Lucas, Jr.”","authors":"Robert M. Townsend","doi":"10.1016/j.jmoneco.2025.103842","DOIUrl":"10.1016/j.jmoneco.2025.103842","url":null,"abstract":"<div><div>This essay honors the contributions of Robert E. Lucas, Jr., to the most important macro problems where informational frictions are relevant today. The first step focuses on two of Lucas’ papers where information frictions play somewhat different roles, zeroing in on the key elements: money, islands, and imperfect information. Each paper is then linked to associated branches of the literature. The second step argues that new technologies have now emerged which make those key elements all the more crucial in the macroeconomics of today. Monetary policy considerations were forefront in Lucas’ mind, and so that is a recurrent theme throughout this essay.</div></div>","PeriodicalId":48407,"journal":{"name":"Journal of Monetary Economics","volume":"155 ","pages":"Article 103842"},"PeriodicalIF":4.1,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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