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The purpose of this paper is to present the role of aspects related to public leadership in the actions developed by three state universities in São Paulo (Brazil) in the context of the COVID-19 pandemic, namely the University of Campinas (Unicamp), University of São Paulo (USP) and São Paulo State University (Unesp).

Since this is a viewpoint article, part of the information presented is characterized by the authors' points of view. It should be highlighted, however, that the information provided is based on searches in scientific bases, institutional websites and published press reports.

According to the authors, aspects of public leadership are being properly employed by the public servants of the analyzed universities, resulting in the positive actions that have been implemented.

There is no existing literature on public leadership in these Brazilian universities during the COVID-19 pandemic.

This study aims to present consolidated information on blockchain, which seeks to better clarify the concept of blockchain and the associated implications and characteristics.

The methodological procedure used was Grounded Theory, based on a Systematic Bibliographic Review on the adoption of blockchain in supply chain management. To add experts' opinion on the subject to the analyzed panorama, data from a survey were also considered in the analysis.

The Grounded Theory enabled the development of consolidated information on blockchain related knowledge, identifying benefits, fragilities and contributions of the concept for supply chain management.

An epistemological gap has been identified between the use of blockchain in supply chain management and a theoretical basis to support the application. The originality of this study lies in providing a proposition of this theoretical basis.

This paper aims to conduct case studies in companies of different branches of the agribusiness sector to analyze the degree of adherence to lean production system, considering the use of techniques and tools, and how the specificities of the agribusiness system work.

By contributing to the refinement of the theory, multiple type case studies were conducted in eight agribusiness units from different branches by applying structured interviews, on-site visits and document analysis. The comparative analysis of the cases occurred focusing on the degree of adherence to lean production system; use of techniques and tools; and influence of the specificities of agribusiness systems.

The adoption of lean production system occurs as an improvement mechanism of organizational performance. However, it is necessary to advance in the formalization of the actions, which need to encourage the creation of new leaders who spread the organizational philosophy. When comparing the degree of adherence to lean production with the use of techniques and tools, it was observed that there is no direct relationship, indicating that each organization should select only the techniques and tools that will improve their own organizational performance. At last, the specific characteristics of seasonality of consumption, quality and health surveillance and sociological aspects of the food have high influence on surveyed agribusiness systems, and its effects can be minimized by the techniques and tools associated with lean production system.

The analysis is valid for the universe investigated due to the specific characteristic of the case study.

The literature regarding the lean production philosophy is vast; however, the agribusiness segment, one of the major sectors of the global economy, features a large gap in literature. This study is one of the first original papers to report this reality.