World Development Perspectives最新文献

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Preferences for sustainable intensification: Do agricultural interventions matter? Plot-level evidence from Senegal
IF 2.2
World Development Perspectives Pub Date : 2024-12-01 DOI: 10.1016/j.wdp.2024.100645
Arouna Kouandou
{"title":"Preferences for sustainable intensification: Do agricultural interventions matter? Plot-level evidence from Senegal","authors":"Arouna Kouandou","doi":"10.1016/j.wdp.2024.100645","DOIUrl":"10.1016/j.wdp.2024.100645","url":null,"abstract":"<div><div>To what extent do agricultural support programs that promote modern intensification shape farmers’ incentives to adopt sustainable agricultural management practices? We answer this question by examining the effects of receiving input subsidies and agricultural extension services on Senegalese smallholder farmers’ preferences for crop diversification, crop rotation, rotational grazing, fallowing, and mulching crop residues. The empirical investigation is based on the 2020/2021 Annual Agricultural Survey (AAS) and uses two identification strategies: selection on observables and the Abadie-Imbens matching approach to account for differences in farmers’ socio-economic backgrounds and biophysical characteristics of plots and the likelihood of benefiting from input subsidies and agricultural extension services. We find heterogeneous responses to extension services and input subsidies. In particular, we find that receiving agricultural extension services is associated with a higher likelihood of adopting crop rotation, rotational grazing and fallow. On the other hand, the effect of receiving fertiliser subsidies is significantly negative for these three practices. The results also indicate that receiving extension services is associated with a lower likelihood of adopting crop diversification, and receiving seed subsidies is associated with a higher likelihood of mulching crop residues. As international research and development organizations consider sustainable intensification as a means to effectively address soil degradation and achieve greater agricultural productivity in sub-Saharan Africa, our findings call for the design of agricultural policies to support smallholder agriculture that take into account unintended consequences in terms of disincentives for the adoption of sustainable agricultural practices.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100645"},"PeriodicalIF":2.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746658","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
Beer, barley, livestock, milk: Who adopts agricultural innovations in rural Rajasthan? 啤酒、大麦、牲畜、牛奶:谁在拉贾斯坦邦农村采用农业创新?
IF 2.2
World Development Perspectives Pub Date : 2024-11-23 DOI: 10.1016/j.wdp.2024.100643
Dina Najjar , Bipasha Baruah
{"title":"Beer, barley, livestock, milk: Who adopts agricultural innovations in rural Rajasthan?","authors":"Dina Najjar ,&nbsp;Bipasha Baruah","doi":"10.1016/j.wdp.2024.100643","DOIUrl":"10.1016/j.wdp.2024.100643","url":null,"abstract":"<div><div>Research conducted in developing countries in the past 50 years generally suggests that most agricultural innovations (whether technological, social, or financial in nature) end up reinforcing existing socio-economic hierarchies based on gender and class. Most of these findings are drawn from the Green Revolution, which focused overwhelmingly on high-yielding varieties of rice, maize, and wheat, along with the introduction or expansion of irrigation and extension services and the use of fertilizers and pesticides. Less is known about how agricultural innovations involving other crops or livestock, especially if introduced in tandem, perform in alleviating poverty or reducing gender inequality. We conducted a study in three agricultural communities in rural Rajasthan, India to understand how the adoption of agricultural innovations for barley cultivation and livestock rearing are influenced by the gender, age, and class background of farmers, and whether such innovations can alleviate poverty and promote gender equality in rural settings. We found that although innovation adoption is influenced by gender, class and age (with gender exerting a stronger influence than class or age), poorer farmers and women can under certain circumstances benefit from agricultural innovations adopted initially by wealthier male farmers.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100643"},"PeriodicalIF":2.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Welfare effect of rice outgrower scheme participation: empirical evidence from northern Ghana 参与水稻外延种植计划的福利效应:加纳北部的经验证据
IF 2.2
World Development Perspectives Pub Date : 2024-11-04 DOI: 10.1016/j.wdp.2024.100640
Joshua Diedong , Benjamin Tetteh Anang , Gideon Danso-Abbeam
{"title":"Welfare effect of rice outgrower scheme participation: empirical evidence from northern Ghana","authors":"Joshua Diedong ,&nbsp;Benjamin Tetteh Anang ,&nbsp;Gideon Danso-Abbeam","doi":"10.1016/j.wdp.2024.100640","DOIUrl":"10.1016/j.wdp.2024.100640","url":null,"abstract":"<div><div>Outgrower schemes can improve farmers’ welfare by boosting farm productivity and increasing market participation. In this context, we examined the effect of participating in outgrower schemes on household welfare indicators while controlling for potential observed and unobserved biases that could influence the outcomes. To address this objective, we employed an endogenous switching regression model to analyze primary data from 555 rice farmers in northern Ghana who use irrigation. The results revealed significant effect of sex of household’s head, age, marital status, education, dependency ratio, non-farm work, extension contact, access to credit, membership of farmer group, proximity to commercial markets, distance to outgrower schemes, familiarity with scheme operations, and the geographical location of the farmer on the propensity to participate in outgrower schemes. Importantly, participation in outgrower schemes resulted in a 57.6%, 23.6%, and 48.1% increase in household consumption expenditure per capita, income per capita, and asset ownership, respectively, exceeding what participants could have gained if they had not participated. Similarly, the non-participants, would have experienced a 21.2%, 34.0%, and 26.1% increase in household consumption expenditure per capita, income per capita, and assets, respectively, if they had joined the scheme Therefore, strategies to improve farmer groups and extension services are required as they are critical channels for encouraging more farmers to participate in the schemes and thereby improving their welfare.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100640"},"PeriodicalIF":2.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579050","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 political economy of natural resource conflicts in Ghana: The case of the Songor 加纳自然资源冲突的政治经济学:松戈尔案例
IF 2.2
World Development Perspectives Pub Date : 2024-10-30 DOI: 10.1016/j.wdp.2024.100641
Eric Tamatey Lawer , Pius Siakwah , Chika C. Mba , Kofi Takyi Asante
{"title":"The political economy of natural resource conflicts in Ghana: The case of the Songor","authors":"Eric Tamatey Lawer ,&nbsp;Pius Siakwah ,&nbsp;Chika C. Mba ,&nbsp;Kofi Takyi Asante","doi":"10.1016/j.wdp.2024.100641","DOIUrl":"10.1016/j.wdp.2024.100641","url":null,"abstract":"<div><div>In contrast to studies that assume that self-interest is the primary factor motivating African leaders in natural resource conflicts, we argue that successive Ghanaian governments have intervened in these conflicts by attempting to balance the imperatives of national development, neoliberal reforms, and regime survival. This argument is based on an analysis of the struggles over access to the Songor – a salt-yielding lagoon in southeastern Ghana – as an outcome of the social contradiction engendered by the pursuit of high modernist development aspirations within a framework of neoliberal austerity. In Ghana, successive governments have deployed the coercive apparatus of the state on behalf of private investors in their struggles with community members over access to the Songor. Drawing on interviews, focus group discussions, policy documents and media reports, we argue that the fate of the communities around the Songor illustrates the infringement on economic and cultural rights of local communities when such rights clash with the developmental aspirations of national elites. The resulting economic and social dislocations experienced by the affected communities have been implicitly accepted by the government as the necessary price to pay for development of the salt industry in Ghana. The Songor case also illustrates a fundamental paradox of neoliberal development where the state is expected to abandon its economic role, but the private sector is incapable of filling the gap without substantial material support from the state.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100641"},"PeriodicalIF":2.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553865","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
Climate and security risks and their implications for sustainable livelihoods: The case of Maguindanao in conflict-ridden Philippine Bangsamoro 气候和安全风险及其对可持续生计的影响:冲突频发的菲律宾邦萨玛洛的马京达瑙岛案例
IF 2.2
World Development Perspectives Pub Date : 2024-10-25 DOI: 10.1016/j.wdp.2024.100642
Laurence L. Delina , Jon H. Gaviola , Rufa Cagoco-Guiam
{"title":"Climate and security risks and their implications for sustainable livelihoods: The case of Maguindanao in conflict-ridden Philippine Bangsamoro","authors":"Laurence L. Delina ,&nbsp;Jon H. Gaviola ,&nbsp;Rufa Cagoco-Guiam","doi":"10.1016/j.wdp.2024.100642","DOIUrl":"10.1016/j.wdp.2024.100642","url":null,"abstract":"","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100642"},"PeriodicalIF":2.2,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142530325","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
Is seed aid distribution still justified in South Sudan? 在南苏丹分发种子援助是否仍然合理?
IF 2.2
World Development Perspectives Pub Date : 2024-10-08 DOI: 10.1016/j.wdp.2024.100638
Esther Smits , Rob Kuijpers , Justin Amos Miteng , David Deng Chol , Turo Thomas Mono , Nicola Francesconi
{"title":"Is seed aid distribution still justified in South Sudan?","authors":"Esther Smits ,&nbsp;Rob Kuijpers ,&nbsp;Justin Amos Miteng ,&nbsp;David Deng Chol ,&nbsp;Turo Thomas Mono ,&nbsp;Nicola Francesconi","doi":"10.1016/j.wdp.2024.100638","DOIUrl":"10.1016/j.wdp.2024.100638","url":null,"abstract":"<div><div>Seed aid—or free distribution of seeds to farmers—is a popular intervention to simultaneously reduce food insecurity and dependency on food aid in fragile countries. However, seed aid distribution also has the potential to hinder or distort the development of local seed markets. In this study we analyze the targeting and impact of seed aid across the green belt (cutting across the southern/equatorial states) of South Sudan. Using a primary and unique dataset on 1,990 farm households, we find that seed aid is widely rather than selectively distributed. Almost a third of farm households receive seed aid despite the general availability of locally recycled seed varieties. Seed aid distribution does not seem to favor particularly poor, vulnerable and food insecure households, but those that are embedded in community networks, organizations and institutions. Using a double robust methodology based on Inverse Probability Weighted Regression Adjustment (IPWRA), we also find that the adoption of seed aid by farm households does not result in increased maize production, as it is neither associated with agricultural intensification nor with the expansion of cultivated land. Seed aid seems to substitute rather than supplement local seed varieties. These findings emphasize a lack of intentionality in seed aid distribution. Still, it must be noted that the effectiveness of seed aid distribution may be greater outside our study area, above the green belt, where conflicts and natural disasters remain more frequent and intense, and where farmers are more likely to be seed insecure. But overall, this study supports the widespread perception that South Sudan is ready for a transition towards a market-based seed distribution system.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100638"},"PeriodicalIF":2.2,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crowding-out effect of tobacco consumption on household food expenditures in Cameroon 喀麦隆烟草消费对家庭食品支出的挤出效应
IF 2.2
World Development Perspectives Pub Date : 2024-10-05 DOI: 10.1016/j.wdp.2024.100635
Paul Tadzong Mouafo , Armand Mboutchouang Kountchou , Roger Tsafack Nanfosso
{"title":"Crowding-out effect of tobacco consumption on household food expenditures in Cameroon","authors":"Paul Tadzong Mouafo ,&nbsp;Armand Mboutchouang Kountchou ,&nbsp;Roger Tsafack Nanfosso","doi":"10.1016/j.wdp.2024.100635","DOIUrl":"10.1016/j.wdp.2024.100635","url":null,"abstract":"<div><div>This study delves into the critical issue of household budgets in Cameroon, specifically focusing on the impact of tobacco expenditure. Tobacco use often represents a significant portion of a household’s financial resources, potentially leading to a phenomenon known as the “crowding-out effect.” This effect describes a situation where increased tobacco spending leads to a decrease in the budget allocated to other essential goods and services. To gain a deeper understanding of this phenomenon, this study employs a quantitative approach. The analysis utilizes data from a nationally representative household survey conducted in Cameroon during 2014 (ECAM4). A two-stage least squares (2SLS) technique is implemented to address a potential statistical issue known as endogeneity, which could otherwise skew the results. The study’s findings reveal a concerning trend: tobacco expenditure has a negative impact on the budget shares allocated to essential goods such as food, clothing, and household equipment. This negative impact appears to be particularly pronounced for male consumers within households. Based on these findings, the study suggested that implementing tobacco control policies could lead to significant improvements in household well-being and overall health status. These policies, by encouraging a reduction in tobacco use, could free up resources that could then be reallocated towards essential goods, ultimately improving household financial stability and health outcomes.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100635"},"PeriodicalIF":2.2,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419106","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
Analysis of the ‘Good’ performance indicators of Non-Governmental Development Organizations 非政府发展组织 "良好 "绩效指标分析
IF 2.2
World Development Perspectives Pub Date : 2024-10-04 DOI: 10.1016/j.wdp.2024.100639
Susana Álvarez-Otero, Emma Álvarez-Valle, Mar Arenas-Parra, Raquel Quiroga-García
{"title":"Analysis of the ‘Good’ performance indicators of Non-Governmental Development Organizations","authors":"Susana Álvarez-Otero,&nbsp;Emma Álvarez-Valle,&nbsp;Mar Arenas-Parra,&nbsp;Raquel Quiroga-García","doi":"10.1016/j.wdp.2024.100639","DOIUrl":"10.1016/j.wdp.2024.100639","url":null,"abstract":"<div><div>The current economic and political crisis has brought about a change in the environment in which Non-Governmental Development Organizations (NGDOs) have traditionally operated. This change can be summed up as a reduction in the funds received accompanied by an increase in the population they must serve. It is thus important to possess mechanisms that allow an analysis of the excellent work performed by NGDOs. A knowledge of the NGDOs’ efficiency in managing previous projects can contribute to improving their future achievements. This research aims to establish some objective indicators that permit an evaluation of the efficiency of these organizations. Firstly, a detailed analysis of the Spanish Agency for International Development Cooperation (AECID) regulation is conducted. This allows us to synthesise the indicators of a good performance by an NGDO based on a study of the eligibility criteria of public donors. The study concludes that the internal good practices criteria of the NGDOs of the AECID can be grouped into four criteria: experience, transparency and internal operations, human resources, and financial resources. Subsequently, a global performance measure of the NGDOs is built using a multi-criteria decision-making approach that minimises the distance from an ideal point whilst maximising the distance from an anti-ideal point. Our approach has been applied in the evaluation of 20 Spanish NGDOs.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100639"},"PeriodicalIF":2.2,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Voluntary sustainability standards and technical efficiency of Honduran smallholder coffee producers 洪都拉斯小农咖啡生产者的自愿可持续性标准和技术效率
IF 2.2
World Development Perspectives Pub Date : 2024-10-02 DOI: 10.1016/j.wdp.2024.100637
David Navichoc , Mengistu Alamneh , Paulo Mortara Batistic , Thomas Dietz , Bernard Kilian
{"title":"Voluntary sustainability standards and technical efficiency of Honduran smallholder coffee producers","authors":"David Navichoc ,&nbsp;Mengistu Alamneh ,&nbsp;Paulo Mortara Batistic ,&nbsp;Thomas Dietz ,&nbsp;Bernard Kilian","doi":"10.1016/j.wdp.2024.100637","DOIUrl":"10.1016/j.wdp.2024.100637","url":null,"abstract":"<div><div>Sustainable coffee production promises to improve production techniques and enhance the socioeconomic conditions of smallholder farmers. Using primary survey data from 659 coffee producers in Honduras, this study assesses the impact of voluntary sustainability standards (VSS) on the technical efficiency of smallholder coffee production. The article uses the Stochastic Production Frontier Analysis model to analyze and compare the technical efficiency (TE) of certified and non-certified coffee producers. To provide reliable comparability between groups, the dataset was balanced using Covariate Balancing Propensity Score (CBPS). The results show that the mean technical efficiency was 52.86% for pooled certified farmers and 55.56% for non-certified smallholder coffee producers. Specifically, the technical efficiency of 4C farmers was 51.58%, 53.82% for the Fairtrade group, 60.56% for RA farmers, and 60.15% for the UTZ group, indicating substantial inefficiencies in the coffee production of the different certified groups. Results from Tobit’s model for the determinants of TE indicated that variables such as the age of the household head, access to credit, and training attendance are among the main factors that significantly drive the technical efficiency of certified and non-certified farmers. Based on the findings, enhancing education opportunities, improving infrastructure for better market access and farm management, and expanding credit access are recommended to improve efficiency in the study area. Honduran smallholder coffee producers have considerable potential to increase output with existing technology by improving their technical efficiency. Therefore, stakeholders’ efforts should focus on enhancing efficiency levels and capitalizing on potential gains for both certified and non-certified farmers, to ultimately improve the farmers’ livelihoods.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100637"},"PeriodicalIF":2.2,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142419104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Colonial status and income inequality in developing countries 发展中国家的殖民地地位和收入不平等
IF 2.2
World Development Perspectives Pub Date : 2024-09-26 DOI: 10.1016/j.wdp.2024.100634
Boniface Ngah Epo, Fabrice Mvomo, Henri Ngoa Tabi, Henri Atangana Ondoa
{"title":"Colonial status and income inequality in developing countries","authors":"Boniface Ngah Epo,&nbsp;Fabrice Mvomo,&nbsp;Henri Ngoa Tabi,&nbsp;Henri Atangana Ondoa","doi":"10.1016/j.wdp.2024.100634","DOIUrl":"10.1016/j.wdp.2024.100634","url":null,"abstract":"<div><div>This paper assesses the effect of the colonial status of ex-colonies, settler’s mortality rate, and duration of colonization on income inequality using a dataset comprising 78 developing countries over the period 1990 to 2019. We run Ordinary Least Square regressions on the cross-sectional data and subsequently test for sensitivity of the baseline model to historical, geographical as well as sociocultural factors. For robustness checks, we re-estimate the baseline model on a panel data setting using the Hausman Taylor estimator and a GMM linear dynamic panel data model that factors-in time-invariant historical and cultural variables. Results suggest that: (a) average increase in Gini income inequality for ex-settler’s colonies was higher when compared to ex-peasant colonies; (b) an extra year of the duration of colonization augmented typical overall income inequality and (c) the middling rise in income inequality of ex-British colonies was less than the other ex-colonies whilst ex-Spanish colonies posted an average increase in inequality that was higher than the other former colonies. Results were unaltered when we undertake sensitivity and robustness tests. Furthermore, colonial status mediates the relationships between Gini income inequality and settler’s mortality rate as well as Gini income inequality and duration of colonization. Thus, institutions established since colonization and perpetuated after independence have been more or less prone to incorporating redistribution (inequality) issues.</div></div>","PeriodicalId":37831,"journal":{"name":"World Development Perspectives","volume":"36 ","pages":"Article 100634"},"PeriodicalIF":2.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323689","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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