Climate change poses increasing risks to global agricultural productivity, making understanding of its effects on crop production essential. This study analyses how rising temperatures and accumulating atmospheric CO2 reshape the productive dynamics of wheat, rice, corn, oats, barley, potato, sugar cane, and sunflower production during 2000–2023 using Vector Autoregression, Granger causality, impulse response functions, forecast error variance decomposition, and threshold regression. Granger causality analysis identified a statistically significant predictive relationship between temperature and wheat production, whereas no statistically significant predictive effects were detected for rice, corn, oats, barley, potato, sugar cane, or sunflower production. Impulse response functions showed differentiated crop responses, with corn exhibiting temporary positive adjustments, rice predominantly negative responses, and wheat delayed structural shifts following temperature shocks. Forecast error variance decomposition further revealed substantial differences in climate sensitivity across crops, indicating that sunflower and sugar cane production were largely driven by their own dynamics, whereas rice, corn, potato, oats, and barley were comparatively more influenced by external climatic and economic shocks. Threshold regression identified crop-specific non-linear responses for six crops, whereas oats and barley did not reject the null hypothesis of linearity once critical atmospheric CO2 concentrations were exceeded, confirming that the relationship between temperature and agricultural production changes across climatic regimes. These findings emphasise that climate change does not affect all crops uniformly and support the adoption of crop-specific adaptation strategies, including climate-responsive cultivation practices, targeted irrigation, drought-resistant varieties, and sustainable land management. The study provides evidence-based insights to support climate adaptation policies and strengthen the resilience of global agricultural production systems.
O. Lobonţ, Cristina Criste, Iuliana Militaru et al.· Agriculture· 0 citations
Digital transformation has become a central driver of public administration modernization, as governments increasingly rely on digital technologies to improve public service delivery, administrative efficiency, transparency, and citizen-oriented governance. However, the rapid expansion of digital government research has generated a fragmented literature, dispersed across concepts such as e-government, digital transformation, public services, governance, innovation, and emerging technologies. This fragmentation limits the understanding of how the field is thematically structured and how scientific collaboration is organized across countries and institutions. Therefore, this paper maps the intellectual structure of digital government literature and identifies the dominant themes, emerging research directions, and collaboration patterns within this field. A bibliometric science-mapping analysis was conducted on 1,877 documents indexed in the Web of Science Core Collection, retrieved using the topic search terms "digital transformation" and "public services". The analysis was performed with VOSviewer and focused on keyword co-occurrence, country coauthorship, and organizational co-authorship networks. The findings show that digital transformation serves as the conceptual hub of the field, connecting traditional e-government research with newer themes in innovation, governance, artificial intelligence, big data, trust, adoption, performance, and post-pandemic public service resilience. The countrylevel network reveals broad but uneven international collaboration, while the organizational network remains more fragmented. The study contributes by integrating thematic and collaboration-based perspectives, showing that digital government research is expanding, interdisciplinary, and globally visible, but still institutionally fragmented and unevenly connected. These findings indicate the need for stronger institutional partnerships, interdisciplinary integration, and more coherent research networks in future digital government studies
Andrei Trip, Florina Stanciu, O. Lobonţ· Development Through Research...· 0 citations
