Journal of European Real Estate Research最新文献

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Commercial real estate prices in Europe after COVID-19 新冠疫情后欧洲商业房地产价格
Journal of European Real Estate Research Pub Date : 2023-11-17 DOI: 10.1108/jerer-09-2023-0031
Martin Hoesli, Richard Malle
{"title":"Commercial real estate prices in Europe after COVID-19","authors":"Martin Hoesli, Richard Malle","doi":"10.1108/jerer-09-2023-0031","DOIUrl":"https://doi.org/10.1108/jerer-09-2023-0031","url":null,"abstract":"Purpose The article aims to analyze the behavior of commercial real estate prices in Europe, with a focus on the post-coronavirus disease 2019 (COVID-19) pandemic period. The authors use national and city-level data for the various commercial real estate sectors in ten countries, as well as listed real estate data, to assess any differences across property type and space. Design/methodology/approach The authors analyze the behavior of commercial real estate prices after the COVID-19 pandemic, emphasizing differences across property types. For that purpose, the authors use national and city-level direct real estate data for the ten largest countries in terms of market capitalization, as well as listed real estate data. The article then turns to discussing the likely trajectory of commercial real estate prices in the future. Findings The recent rise in interest rates and geopolitical instability have affected prices differently across sectors. Industrial properties benefited from the pandemic, although prices declined significantly in 2022. Residential properties continued their upward price trend and have been the best-performing property type during the last two decades. Retail real estate continued its downward price trajectory. Thus far, office markets do not appear to be significantly affected by structural changes in the sector. The data for listed real estate markets in Europe suggest that markets bottomed out in early 2023. Originality/value This paper provides for a better understanding of the behavior of commercial real estate prices in Europe since the COVID-19 pandemic. The authors assess whether the effects found during the COVID-19 crisis were temporary or long-lasting. Also, many economic and political uncertainties have emerged since the beginning of the Ukraine war in February 2022, and it is important to analyze the effects of such uncertainties on commercial real estate prices.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136228222","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}
引用次数: 0
International diversification and European firm value: the role of operating efficiency 国际化多元化与欧洲企业价值:经营效率的作用
Journal of European Real Estate Research Pub Date : 2023-11-09 DOI: 10.1108/jerer-07-2023-0025
Islam Ibrahim, Heidi Falkenbach
{"title":"International diversification and European firm value: the role of operating efficiency","authors":"Islam Ibrahim, Heidi Falkenbach","doi":"10.1108/jerer-07-2023-0025","DOIUrl":"https://doi.org/10.1108/jerer-07-2023-0025","url":null,"abstract":"Purpose This study aims to investigate the impact of international diversification on the value and operating efficiency of European real estate firms. Design/methodology/approach The study is conducted using a panel fixed effects regression model to estimate the relationship of international diversification with firm value and operating efficiency. International diversification is mainly measured via the negative of the Herfindahl–Hirschman Index (HHI) using property-level data. Firm value and operating efficiency are proxied by financial ratios observed annually from 2002 to 2021 at the firm level. Findings The results demonstrate that international diversification has a negative effect on firm value. Additionally, it lowers operating efficiency by weakening a firm's ability to generate operating earnings from its assets. By examining whether the reduction in operating efficiency is due to the rental income channel or the capital gains channel, the authors find strong statistical evidence that international diversification negatively impacts capital gains. International diversification is negatively associated with net gains from property valuations (unrealized capital gains) and net profits from property disposals (realized capital gains). Research limitations/implications The empirical analysis is limited to Europe. Originality/value This paper extends the geographical diversification literature. While existing literature focuses on domestic diversification within the United States, this paper explores the effects of international diversification on European real estate firms. To the extent of the authors' knowledge, this is the first paper to examine the impact of geographical diversification on capital gains.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135192534","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}
引用次数: 0
The underestimated global warming potential of refrigerant losses in retail real estate: the impact of CO2 vs CO2e 零售业中被低估的制冷剂损失的全球变暖潜力:二氧化碳对二氧化碳当量的影响
Journal of European Real Estate Research Pub Date : 2023-10-27 DOI: 10.1108/jerer-06-2023-0021
Chiara Kuenzle, Julia Wein, Sven Bienert
{"title":"The underestimated global warming potential of refrigerant losses in retail real estate: the impact of CO2 vs CO2e","authors":"Chiara Kuenzle, Julia Wein, Sven Bienert","doi":"10.1108/jerer-06-2023-0021","DOIUrl":"https://doi.org/10.1108/jerer-06-2023-0021","url":null,"abstract":"Purpose This paper investigates the impact of CO2 vs CO2 “equivalents” (CO2e) by analyzing fugitive emissions, with a particular focus on Fluorinated gases (F-gases), arising from refrigerant leakages in buildings. F-gases are an especially powerful set of GHGs with a global warming potential hundreds to thousands of times greater than that of CO2. Design/methodology/approach The significant impact of CO2e is tested by means of an empirical study with current consumption data from German food retail warehouses. This evaluation involves the analysis of the Carbon Risk Real Estate Monitor's country- and property-type specific pathway, coupled with a paired samples t -test to examine the hypotheses. The assessment is undertaken by evaluating the type of gas and the amount of leakage reported in the baseline year, subsequently converting these values to CO2e units. Findings On average, F-gases account for 40% of total building emissions and nearly 45% of cumulative emissions until 2050. In light of ongoing climate change and the rising number of Cooling Degree Days (CDDs), it becomes imperative to assess both the environmental and economic impact of F-gases and to transition toward environmentally friendly refrigerants. Originality/value The analysis sheds light on the seldom-addressed threats posed by CO2e emissions stemming from refrigerant losses. By identifying these threats, investors can devise strategies to mitigate potential future costs and carbon risks.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136234672","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}
引用次数: 0
A reconceptualisation of the housing cycle based on household upgrading desires 基于家庭升级愿望的住房周期的重新概念化
Journal of European Real Estate Research Pub Date : 2023-10-19 DOI: 10.1108/jerer-11-2022-0037
Colin Jones
{"title":"A reconceptualisation of the housing cycle based on household upgrading desires","authors":"Colin Jones","doi":"10.1108/jerer-11-2022-0037","DOIUrl":"https://doi.org/10.1108/jerer-11-2022-0037","url":null,"abstract":"Purpose The paper sets out a conceptualisation of the housing cycle centring on households' desire to upgrade their housing consumption. Design/methodology/approach The paper begins by studying house price trends and cycles in OECD countries since 2000 to identify housing cycle patterns. It then assesses existing theories partly in relation to these patterns. It then proposes a new conceptualisation of the housing cycle. Findings The paper finds the central role of supply lags in housing cycles is not warranted. Instead, a demand cycle generated by upgrading desires better explains an initial boom followed by a slow recovery. Originality/value The paper challenges existing orthodoxy on housing cycle dynamics and proposes an alternative perspective.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135667173","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}
引用次数: 0
Editorial: Real estate ontology 社论:房地产本体论
IF 1.3
Journal of European Real Estate Research Pub Date : 2023-10-11 DOI: 10.1108/jerer-09-2023-071
Michael White
{"title":"Editorial: Real estate ontology","authors":"Michael White","doi":"10.1108/jerer-09-2023-071","DOIUrl":"https://doi.org/10.1108/jerer-09-2023-071","url":null,"abstract":"","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139320687","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}
引用次数: 0
International retiree migration and housing markets. Evidence from Spain 国际退休人员移民和住房市场。来自西班牙的证据
Journal of European Real Estate Research Pub Date : 2023-09-27 DOI: 10.1108/jerer-04-2023-0014
Paloma Taltavull de La Paz, Karen Martin Gibler
{"title":"International retiree migration and housing markets. Evidence from Spain","authors":"Paloma Taltavull de La Paz, Karen Martin Gibler","doi":"10.1108/jerer-04-2023-0014","DOIUrl":"https://doi.org/10.1108/jerer-04-2023-0014","url":null,"abstract":"Purpose Large numbers of Northern European retirees have migrated to Southern European countries. A relevant part of this migration is not driven by work purposes but rather the desire to establish residence in a warmer country. These migrants come from different countries and exhibit diverse socioeconomic characteristics and preferences, including varying income levels, housing tastes and cultural habits, which could potentially influence the housing market in their host countries. This paper aims to examine the permanent impact of retiree migrant flows on house prices in Alicante, Spain, from 1988 to 2019, explicitly considering the impact related to the country of origin. Design/methodology/approach This paper examines the permanent impact of retiree migrant flows on house prices in Alicante, Spain, from 1988 to 2019, explicitly considering the impact related to the country of origin using panel cointegration – Dynamic Ordinary Least Squared (DOLS) models. Findings Results indicate that the long-term relationship captures the entire effect on house price change and that prices react immediately to the immigrants' presence with permanent effects. The results also suggest that the strong retiree migration flow created a shock in the housing market with different effects on house prices related to the immigrants' country of origin. The model identifies that when income growth in the origin country is slower than in Spain it has a major impact on house prices. When purchasing capacity is larger in Alicante than in the origin country it exerts a stronger effect on housing prices. Retiree migration flow has permanent effect on housing market prices. Practical implications Results indicate several ways to act on social and housing policies in specific cities in Alicante province, as well as in the origin countries, to alleviate potential disadvantages faced by expatriate retirees. Originality/value This paper finds evidence of the specific impact of international retiree migrants on the hosting housing market. This study is the first paper that can estimate the specific effect on housing prices from a flow of retiree migrants by country of origin.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135477795","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}
引用次数: 0
Does the absence of share deals distort commercial real estate indicators? 股票交易的缺失是否扭曲了商业房地产指标?
IF 1.3
Journal of European Real Estate Research Pub Date : 2023-09-07 DOI: 10.1108/jerer-04-2022-0011
Farley Ishaak, Ron van Schie, Jan de Haan, H. Remøy
{"title":"Does the absence of share deals distort commercial real estate indicators?","authors":"Farley Ishaak, Ron van Schie, Jan de Haan, H. Remøy","doi":"10.1108/jerer-04-2022-0011","DOIUrl":"https://doi.org/10.1108/jerer-04-2022-0011","url":null,"abstract":"PurposeCommercial real estate (CRE) indicators typically include asset deals and exclude share deals. This study aims to explore the phenomenon of real estate share deals and assess whether omitting these transactions results in indicators that do not accurately reflect the market.Design/methodology/approachVarious registers in the Netherlands were used to estimate transaction volumes, total values and price developments of both share and asset deals. Share deals are company transfers and its transactions cover more than real estate. To estimate the contribution of real estate in share deals, valuations were used.FindingsIn the Netherlands, share deals are most prominent for rental dwellings. Adding share deals to volume and value indicators seems required. In price development estimates, significant differences were found for dwellings between share and asset deals. Price indices should, therefore, also include share deals, but in practice this is difficult and has little impact on the outcomes due to the low weight of share deals.Research limitations/implicationsLegislation has a major impact on choosing a share or asset deal. The significance of share deals is expected to vary amongst countries. Performing similar research in other countries will contribute in harmonising real estate indicators.Practical implicationsStatistical agencies face many challenges in the construction of CRE indicators. This study provides statisticians knowledge that can be used to evaluate possible data gaps.Originality/valueThis is the first study to estimate indicators of real estate share deals and compare these to asset deal indicators.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80824939","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}
引用次数: 0
Choosing annuities for a home reversion: the case of the French viager market 为家庭回归选择年金:以法国游客市场为例
IF 1.3
Journal of European Real Estate Research Pub Date : 2023-09-05 DOI: 10.1108/jerer-01-2023-0004
Jean-Baptiste Coulomb, F. Larceneux, Arnaud Simon
{"title":"Choosing annuities for a home reversion: the case of the French viager market","authors":"Jean-Baptiste Coulomb, F. Larceneux, Arnaud Simon","doi":"10.1108/jerer-01-2023-0004","DOIUrl":"https://doi.org/10.1108/jerer-01-2023-0004","url":null,"abstract":"PurposeThe authors analyzed annuitization preferences when retired people extract cash from their homes. Based on 2,608 viager (home reversion) transactions, the authors study the relations between annuitization, negotiation, cash extraction, age, gender and marital status.Design/methodology/approachA database comprising 2,608 transactions is used. The three-stage least squares (3SLS) and moderation models are implemented, with a focus on potential adverse selection issues.FindingsThe authors found that difficulties in selling a property generally result in increased annuitization. The single men's group endures gender inequality, suffering from limitations in their possibility to extract wealth and annuitize, as well as an additional price discount during negotiation. Young single men, as compared to young single women and young couples, must consent to a substantial price reduction if they prefer a high down payment and limited price reductions if they prefer annuities. Elderly single men, as compared to young single men, have less capacity to negotiate, a concern that is reinforced when they prefer annuities.Originality/valueAmong the home equity conversion products, the academic real estate literature has intensely analyzed the reverse mortgage. The viager is distinct from a mortgage in that it consists of the true sale of a property without bank involvement. This product deserves reinforced attention in an aging continental Europe. It exists in numerous countries (France, Belgium, Germany, Italy, Spain, etc.).","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88985568","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}
引用次数: 0
What is real estate? Five ontological questions for the discipline 什么是房地产?本学科的五个本体论问题
IF 1.3
Journal of European Real Estate Research Pub Date : 2023-08-10 DOI: 10.1108/jerer-08-2022-0022
O. A. K’Akumu
{"title":"What is real estate? Five ontological questions for the discipline","authors":"O. A. K’Akumu","doi":"10.1108/jerer-08-2022-0022","DOIUrl":"https://doi.org/10.1108/jerer-08-2022-0022","url":null,"abstract":"PurposeThe study seeks to identify and document definitional challenges that hamper the delineation of the scope of real estate as a discipline and as an industry. Through literature review the article distils the perception of body of knowledge (BOK) of real estate within the academia. Two main issues are flagged up: the problem of undefined BOK and the collegiate dilemma. Later the study looks at the standard economic classification documents to capture the occupational domains of real estate professionals or real estate activities. These steps are necessary to help define an alternative academic, practical and social meaning of real estate that is sufficient and precise.Design/methodology/approachThe study uses literature review and, as primary method, qualitative document analysis (QDA). The study has made a special appeal for the application of qualitative strategy in real estate research other than following the methodological orthodoxy of quantitative causal research designs. Further, it has argued for the recognition of QDA as a legitimate research method in the context of real estate studies. Consequently, the study performed QDA procedures on international economic classification standards.FindingsFrom literature review and QDA, the study identified five definitional problems in the meanings or understandings of real estate: undefined body of knowledge, collegiate dilemma, inadequate classification of real estate occupations, inadequate industry classification and inadequate economic sector positioning. These are aspects that lead to misconceptions of the true boundary of knowledge in society and in the academia. The paper offers clarity and insights for the redrawing of these boundaries to give real estate its rightful place in the academia and in the real world.Originality/valueThe article follows up on the academic and social misconceptions on the BOK of real estate as a discipline and an economic activity domain to identify the contribution of real estate to the welfare of mankind. Ontology or the organization of academic or social knowledge is used to map out or catalogue real estate against competing domains and to show that the role of real estate is grossly understated and misunderstood. From the findings, the study makes recommendations to university curriculum developers, and international organizations like ILO, and UN-DESA to revise their conceptions of real estate to give the discipline its rightful position in society.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82197475","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}
引用次数: 0
A factor analysis of landlords’ and retail trade tenants’ different beliefs in lease negotiations: evidence from the Swedish market 房东和零售贸易租户在租赁谈判中不同信念的因素分析:来自瑞典市场的证据
IF 1.3
Journal of European Real Estate Research Pub Date : 2023-07-18 DOI: 10.1108/jerer-08-2022-0023
B. Lundgren, Cecilia Hermansson, Filip Gyllenberg, Johan Koppfeldt
{"title":"A factor analysis of landlords’ and retail trade tenants’ different beliefs in lease negotiations: evidence from the Swedish market","authors":"B. Lundgren, Cecilia Hermansson, Filip Gyllenberg, Johan Koppfeldt","doi":"10.1108/jerer-08-2022-0023","DOIUrl":"https://doi.org/10.1108/jerer-08-2022-0023","url":null,"abstract":"Purpose The purpose is to increase knowledge of rent negotiations by investigating differences in beliefs held by property landlords and retailers on factors that they deem important in rent negotiation.Design/methodology/approach This study investigates differences in subjective beliefs held by landlords and retail trade tenants on factors that affect rent levels during the rent negotiation process using a factor analysis approach. Semi-structured interviews were made with seven large real estate owners/landlords and retailers and eight experts in negotiating retail rent to elicit variables that have an impact on retail rent. Thereafter, a web-based survey was sent to 421 respondents who had experience in rent negotiation. Several factors were extracted using factor analysis. The data collection was made in Sweden during the coronavirus disease 2019 (COVID-19) pandemic in late spring 2021Findings Significant differences are found in beliefs held by landlords and retail trade tenants in four out of seven-factor: regional growth, e-commerce, customer focus and trust. Landlords rate these factors higher than retailers do. There are also systematic differences between landlords and retailers depending on their education levels on the following factors: rent and vacancies, e-commerce and customer focus. The number of years of experience did not prove to be significant instead differences are found to exist in factorsResearch limitations/implications Not only do traditional factors of importance, such as lease structure, the effect of location, size and anchor or non-anchor tenants, have an effect on negotiated rent levels. Differences in other factors also exist, such as regional growth, e-commerce, customer focus and trust factors that may play an important role in the negation of retail rent.Practical implications The findings provide new insights into the different views on factors that affect rent negotiations between landlords and retail tenants. Knowledge of such differences may increase the overall transparency in the negotiation process. Transparency may be increased by putting forward information on these factors before a negotiation takes place, in order to smooth differences in their beliefs.Social implications If transparency in the negotiation process of retail rent increases, time to reach an agreement, stress and anxiety can be reduced by putting forward information on factors where differences exist between landlords and retailersOriginality/value New insights on retail rent negotiation have been put forward in this research paper. Not only do traditional factors such as lease structure matters, but subjective beliefs on factors such as regional growth and the level of education are also important, as this study has shown using a factors analysis approach.","PeriodicalId":44570,"journal":{"name":"Journal of European Real Estate Research","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82939238","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}
引用次数: 0
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