Daniel R. Biggers, Elizabeth Mitchell Elder, Seth J. Hill, Thad Kousser, Gabriel S. Lenz, Mackenzie Lockhart
Abstract The 2020 presidential election brought expanded vote-by-mail opportunities, a rise in attacks on this process’s integrity, and the implementation of novel programs such as California’s Where’s My Ballot? system to ensure confidence in mail balloting. Can heightening awareness of this ballot-tracking system and other election protections alleviate fraud concerns and raise turnout? We assess whether messages reinforcing election integrity increased participation in the 2020 election through a large-scale voter mobilization field experiment. California registrants were mailed a letter that described either existing safeguards to prevent vote-by-mail fraud or the ability to track one’s ballot and ensure that it was counted. Analysis of state voter records reveals that neither message increased turnout over a simple election reminder or even no contact, even among subgroups where larger effects might be expected. In the context of a high-profile, high-turnout presidential election, assurances about ballot and electoral integrity did not increase turnout.
{"title":"Can Addressing Integrity Concerns about Mail Balloting Increase Turnout? Results from a Large-Scale Field Experiment in the 2020 Presidential Election","authors":"Daniel R. Biggers, Elizabeth Mitchell Elder, Seth J. Hill, Thad Kousser, Gabriel S. Lenz, Mackenzie Lockhart","doi":"10.1017/XPS.2022.31","DOIUrl":"https://doi.org/10.1017/XPS.2022.31","url":null,"abstract":"Abstract The 2020 presidential election brought expanded vote-by-mail opportunities, a rise in attacks on this process’s integrity, and the implementation of novel programs such as California’s Where’s My Ballot? system to ensure confidence in mail balloting. Can heightening awareness of this ballot-tracking system and other election protections alleviate fraud concerns and raise turnout? We assess whether messages reinforcing election integrity increased participation in the 2020 election through a large-scale voter mobilization field experiment. California registrants were mailed a letter that described either existing safeguards to prevent vote-by-mail fraud or the ability to track one’s ballot and ensure that it was counted. Analysis of state voter records reveals that neither message increased turnout over a simple election reminder or even no contact, even among subgroups where larger effects might be expected. In the context of a high-profile, high-turnout presidential election, assurances about ballot and electoral integrity did not increase turnout.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43820260","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}
Abstract In democracies, policy ambitions hinge upon governments’ ability to collect tax revenue from their citizens. Ongoing funding cuts at the Internal Revenue Service (IRS) undermine the US government’s ability to fulfill this function. Yet, despite its central importance, funding for IRS enforcement activities has received scant scholarly attention, limiting our understanding of the factors that underlie public attitudes on this issue. In this article, we report the results of preregistered experiments that test whether citizens’ attitudes regarding the IRS can be shaped by framing efforts. Specifically, we test both information-based and value-consistent frames that invoke partisans’ core ideological concerns. Results show that these frames significantly increase public support for the IRS, as well as citizens’ willingness to learn more and become politically active. Thus, to ensure state capacity, information about the consequences of IRS underfunding and appeals to partisans’ ideological concerns can be implemented to increase support for tax collection.
{"title":"Ought It Audit? Information, Values, and Public Support for the Internal Revenue Service","authors":"Ian G. Anson, John V. Kane","doi":"10.1017/XPS.2022.26","DOIUrl":"https://doi.org/10.1017/XPS.2022.26","url":null,"abstract":"Abstract In democracies, policy ambitions hinge upon governments’ ability to collect tax revenue from their citizens. Ongoing funding cuts at the Internal Revenue Service (IRS) undermine the US government’s ability to fulfill this function. Yet, despite its central importance, funding for IRS enforcement activities has received scant scholarly attention, limiting our understanding of the factors that underlie public attitudes on this issue. In this article, we report the results of preregistered experiments that test whether citizens’ attitudes regarding the IRS can be shaped by framing efforts. Specifically, we test both information-based and value-consistent frames that invoke partisans’ core ideological concerns. Results show that these frames significantly increase public support for the IRS, as well as citizens’ willingness to learn more and become politically active. Thus, to ensure state capacity, information about the consequences of IRS underfunding and appeals to partisans’ ideological concerns can be implemented to increase support for tax collection.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43029735","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}
By exacerbating a pre-existing crisis of childcare in the United States, the COVID-19 pandemic forced many parents to renegotiate household arrangements. What shapes parents’ preferences over different arrangements? In an online conjoint experiment, we assess how childcare availability, work status and earnings, and the intra-household division of labor shape heterosexual American parents’ preferences over different situations. We find that while mothers and fathers equally value outside options for childcare, the lack of such options – a significant feature of the pandemic – does not significantly change their evaluations of other features of household arrangements. Parents’ preferences over employment, earnings, and how to divide up household labor exhibit gendered patterns, which persist regardless of childcare availability. By illustrating the micro-foundations of household decision-making under constraints, our findings help to make sense of women’s retrenchment from the labor market during the pandemic: a pattern which may have long-term economic and political consequences.
{"title":"Childcare, Work, and Household Labor During a Pandemic: Evidence on Parents’ Preferences in the United States","authors":"Annabelle Hutchinson, Sarah Khan, Hilary Matfess","doi":"10.1017/XPS.2022.24","DOIUrl":"https://doi.org/10.1017/XPS.2022.24","url":null,"abstract":"\u0000 By exacerbating a pre-existing crisis of childcare in the United States, the COVID-19 pandemic forced many parents to renegotiate household arrangements. What shapes parents’ preferences over different arrangements? In an online conjoint experiment, we assess how childcare availability, work status and earnings, and the intra-household division of labor shape heterosexual American parents’ preferences over different situations. We find that while mothers and fathers equally value outside options for childcare, the lack of such options – a significant feature of the pandemic – does not significantly change their evaluations of other features of household arrangements. Parents’ preferences over employment, earnings, and how to divide up household labor exhibit gendered patterns, which persist regardless of childcare availability. By illustrating the micro-foundations of household decision-making under constraints, our findings help to make sense of women’s retrenchment from the labor market during the pandemic: a pattern which may have long-term economic and political consequences.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42092120","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}
Cheryl Boudreau, Christopher S. Elmendorf, Scott A. Mackenzie
Abstract Political parties and civic organizations disseminate information to improve citizen decision making in local elections. Do citizens choose to consume such information and, if so, how does it affect their decisions? We conduct a survey experiment during a real-world local election that randomly assigns 1) political party endorsements, 2) a voter guide, 3) no information, or 4) a choice among these options. Respondents assigned to receive party endorsements and a voter guide are more likely than respondents receiving no information to choose candidates who share their policy views. When given a choice, a majority opts to receive information (including many with low levels of political interest), with most respondents preferring a voter guide. Using an instrumental variable approach, we show that the effect of information on those who choose to receive it is substantial. These results offer hope that voter education efforts can succeed despite widespread political disinterest.
{"title":"The Civic Option? Using Experiments to Estimate the Effects of Consuming Information in Local Elections","authors":"Cheryl Boudreau, Christopher S. Elmendorf, Scott A. Mackenzie","doi":"10.1017/XPS.2022.19","DOIUrl":"https://doi.org/10.1017/XPS.2022.19","url":null,"abstract":"Abstract Political parties and civic organizations disseminate information to improve citizen decision making in local elections. Do citizens choose to consume such information and, if so, how does it affect their decisions? We conduct a survey experiment during a real-world local election that randomly assigns 1) political party endorsements, 2) a voter guide, 3) no information, or 4) a choice among these options. Respondents assigned to receive party endorsements and a voter guide are more likely than respondents receiving no information to choose candidates who share their policy views. When given a choice, a majority opts to receive information (including many with low levels of political interest), with most respondents preferring a voter guide. Using an instrumental variable approach, we show that the effect of information on those who choose to receive it is substantial. These results offer hope that voter education efforts can succeed despite widespread political disinterest.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45449548","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}
John M. Carey, B. Nyhan, Joseph B. Phillips, Jason Reifler
Abstract Public health officials have faced resistance in their efforts to promote mask-wearing to counter the spread of COVID-19. One approach to promoting behavior change is to alert people to the fact that a behavior is common (a descriptive norm). However, partisan differences in pandemic mitigation behavior mean that Americans may be especially (in)sensitive to information about behavioral norms depending on the party affiliation of the group in question. In July–August 2020, we tested the effects of providing information to respondents about how many Americans, co-partisans, or out-partisans report wearing masks regularly on both mask-wearing intentions and on the perceived effectiveness of masks. Learning that a majority of Americans report wearing masks regularly increases mask-wearing intentions and perceived effectiveness, though the effects of this information are not distinguishable from other treatments.
{"title":"Partisanship Unmasked? The Role of Politics and Social Norms in COVID-19 Mask-Wearing Behavior","authors":"John M. Carey, B. Nyhan, Joseph B. Phillips, Jason Reifler","doi":"10.1017/XPS.2022.20","DOIUrl":"https://doi.org/10.1017/XPS.2022.20","url":null,"abstract":"Abstract Public health officials have faced resistance in their efforts to promote mask-wearing to counter the spread of COVID-19. One approach to promoting behavior change is to alert people to the fact that a behavior is common (a descriptive norm). However, partisan differences in pandemic mitigation behavior mean that Americans may be especially (in)sensitive to information about behavioral norms depending on the party affiliation of the group in question. In July–August 2020, we tested the effects of providing information to respondents about how many Americans, co-partisans, or out-partisans report wearing masks regularly on both mask-wearing intentions and on the perceived effectiveness of masks. Learning that a majority of Americans report wearing masks regularly increases mask-wearing intentions and perceived effectiveness, though the effects of this information are not distinguishable from other treatments.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41469260","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}
Claire L. Adida, Christina Cottiero, L. Falabella, Isabel Gotti, ShahBano Ijaz, G. Phillips, Michael F. Seese
Abstract During the COVID-19 pandemic, the CDC and the WHO have recommended face masks as key to reducing viral transmission. Yet, in the USA, as the first wave erupted in the Summer of 2020, one-fifth of individuals said they wore masks at most “some of the time”, and a majority said that people in their community wore masks at most “some of the time”. What strategies most effectively encourage compliance with this critical COVID-19 prevention measure? Relying on social identity theory, we experimentally assess two possible mechanisms of compliance, elite endorsement, and social norms, among a representative sample of white US-born Evangelicals, a group that has shown resistance to prevention measures. We find evidence for both mechanisms, but social norms play a remarkably important role – increasing support for mask-wearing by 6% with spillover effects on other prevention guidelines. Our findings confirm the role that appeals to norms and elite endorsements play in shaping individual behavior and offer lessons for public health messaging.
{"title":"Taking the Cloth: Social Norms and Elite Cues Increase Support for Masks among White Evangelical Americans","authors":"Claire L. Adida, Christina Cottiero, L. Falabella, Isabel Gotti, ShahBano Ijaz, G. Phillips, Michael F. Seese","doi":"10.1017/XPS.2022.22","DOIUrl":"https://doi.org/10.1017/XPS.2022.22","url":null,"abstract":"Abstract During the COVID-19 pandemic, the CDC and the WHO have recommended face masks as key to reducing viral transmission. Yet, in the USA, as the first wave erupted in the Summer of 2020, one-fifth of individuals said they wore masks at most “some of the time”, and a majority said that people in their community wore masks at most “some of the time”. What strategies most effectively encourage compliance with this critical COVID-19 prevention measure? Relying on social identity theory, we experimentally assess two possible mechanisms of compliance, elite endorsement, and social norms, among a representative sample of white US-born Evangelicals, a group that has shown resistance to prevention measures. We find evidence for both mechanisms, but social norms play a remarkably important role – increasing support for mask-wearing by 6% with spillover effects on other prevention guidelines. Our findings confirm the role that appeals to norms and elite endorsements play in shaping individual behavior and offer lessons for public health messaging.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43114609","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 course of running computational reproducibility checks for Peyton, Huber and Coppock (2021), the Yale ISPS Data Archive identified mistakes concerning the number of statistically significant differences reported for comparisons made between pre-COVID experiments and our replications. These mistakes arose because of errors in the code used to adjust p-values for multiple comparisons, leading to inconsistent reporting of the number of significant differences before and after adjustment. Correcting these mistakes affects Figures 2-3 and the first paragraph on p. 6 in the published article. All point estimates, standard errors, and substantive conclusions are unchanged. In Figure 1, we present the original version of Figure 2 from Peyton, Huber and Coppock (2021) in the top panel (1a) and the correction in the bottom panel (1b). Figure 2 likewise shows the original version of Figure 3 in the top panel (2a) and the correction in the bottom panel (2b). The text on p. 6 of Peyton, Huber and Coppock (2021) reads:
{"title":"“The Generalizability of Online Experiments Conducted During The COVID-19 Pandemic” – CORRIGENDUM","authors":"K. Peyton, G. Huber, A. Coppock","doi":"10.1017/XPS.2022.23","DOIUrl":"https://doi.org/10.1017/XPS.2022.23","url":null,"abstract":"In the course of running computational reproducibility checks for Peyton, Huber and Coppock (2021), the Yale ISPS Data Archive identified mistakes concerning the number of statistically significant differences reported for comparisons made between pre-COVID experiments and our replications. These mistakes arose because of errors in the code used to adjust p-values for multiple comparisons, leading to inconsistent reporting of the number of significant differences before and after adjustment. Correcting these mistakes affects Figures 2-3 and the first paragraph on p. 6 in the published article. All point estimates, standard errors, and substantive conclusions are unchanged. In Figure 1, we present the original version of Figure 2 from Peyton, Huber and Coppock (2021) in the top panel (1a) and the correction in the bottom panel (1b). Figure 2 likewise shows the original version of Figure 3 in the top panel (2a) and the correction in the bottom panel (2b). The text on p. 6 of Peyton, Huber and Coppock (2021) reads:","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43907651","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}
Abstract Researchers face difficult decisions about whether to ask potential moderators before or after a survey experiment. Competing concerns exist about priming respondents before the experiment and about introducing post-treatment bias. We replicate the classic “welfare” versus “assistance to the poor” survey experiment, randomly assigning respondents to be asked a battery of racial resentment questions either before or after the question wording experiment. We find little evidence that the question wording effect is different between those who are asked about racial resentment before versus after the experiment. Furthermore, we find little evidence that measured racial resentment is affected by this ordering or by the question wording treatment itself.
{"title":"Moderator Placement in Survey Experiments: Racial Resentment and the “Welfare” versus “Assistance to the Poor” Question Wording Experiment","authors":"B. Albertson, S. Jessee","doi":"10.1017/XPS.2022.18","DOIUrl":"https://doi.org/10.1017/XPS.2022.18","url":null,"abstract":"Abstract Researchers face difficult decisions about whether to ask potential moderators before or after a survey experiment. Competing concerns exist about priming respondents before the experiment and about introducing post-treatment bias. We replicate the classic “welfare” versus “assistance to the poor” survey experiment, randomly assigning respondents to be asked a battery of racial resentment questions either before or after the question wording experiment. We find little evidence that the question wording effect is different between those who are asked about racial resentment before versus after the experiment. Furthermore, we find little evidence that measured racial resentment is affected by this ordering or by the question wording treatment itself.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49063748","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}
Abstract We document the effectiveness of automated (robo) calls for increasing voter participation in contrast to most published research which finds little or no effect from automated calls. We establish this finding in a large field experiment which mimics campaign behavior with a targeted, partisan get-out-the-vote campaign. Our findings show that across all treatments, automated calls led to three additional votes for every thousand subjects called during the 2014 midterm general election. Additionally, our experimental design allows for testing how the number of calls in a treatment, that is dosage, affects voter turnout. Here, results show that three extra calls increase the treatment effect to seven additional votes per thousand subjects called, but that too many additional calls decrease that effect to statistical insignificance in a six-call treatment.
{"title":"Large-Scale Evidence for the Effectiveness of Partisan GOTV Robo Calls","authors":"Daniel T. Kling, Thomas Stratmann","doi":"10.1017/XPS.2022.16","DOIUrl":"https://doi.org/10.1017/XPS.2022.16","url":null,"abstract":"Abstract We document the effectiveness of automated (robo) calls for increasing voter participation in contrast to most published research which finds little or no effect from automated calls. We establish this finding in a large field experiment which mimics campaign behavior with a targeted, partisan get-out-the-vote campaign. Our findings show that across all treatments, automated calls led to three additional votes for every thousand subjects called during the 2014 midterm general election. Additionally, our experimental design allows for testing how the number of calls in a treatment, that is dosage, affects voter turnout. Here, results show that three extra calls increase the treatment effect to seven additional votes per thousand subjects called, but that too many additional calls decrease that effect to statistical insignificance in a six-call treatment.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41573542","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}
Abstract Objectification and dehumanization are topics often discussed within the social psychology and feminist theory literature. Research on objectification has largely focused on the sexual objectification of women’s bodies, whereas the dehumanization literature has focused on dehumanization in the context of racial and ethnic groups. Extant political science research has only recently begun to engage with these concepts. In this manuscript, we build upon these literatures and apply these insights to questions relevant to politics. In particular, we argue that objectifying and dehumanizing portrayals of women impact how voters evaluate women politicians and how much they support gender parity in politics. Through a proposed experimental design, we test our hypothesis that the objectification of women as a group can decrease positive evaluations and likelihood of electoral support for women political candidates.
{"title":"Objectified and Dehumanized: Does Objectification Impact Perceptions of Women Political Candidates?","authors":"Claire M. Gothreau, A. Alvarez, Amanda Friesen","doi":"10.1017/XPS.2022.15","DOIUrl":"https://doi.org/10.1017/XPS.2022.15","url":null,"abstract":"Abstract Objectification and dehumanization are topics often discussed within the social psychology and feminist theory literature. Research on objectification has largely focused on the sexual objectification of women’s bodies, whereas the dehumanization literature has focused on dehumanization in the context of racial and ethnic groups. Extant political science research has only recently begun to engage with these concepts. In this manuscript, we build upon these literatures and apply these insights to questions relevant to politics. In particular, we argue that objectifying and dehumanizing portrayals of women impact how voters evaluate women politicians and how much they support gender parity in politics. Through a proposed experimental design, we test our hypothesis that the objectification of women as a group can decrease positive evaluations and likelihood of electoral support for women political candidates.","PeriodicalId":37558,"journal":{"name":"Journal of Experimental Political Science","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48355358","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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