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1.

001-es BibID:BIBFORM074802
035-os BibID:(WOS)000446770200103 (Scopus)85052532871 (cikkazonosító)3060
Első szerző:Ahmad Ishtiaq (közgazdász)
Cím:Does Business Group Affiliation Matter for Superior Performance? Evidence from Pakistan / Ishtiaq Ahmad, Judit Oláh, József Popp, Domicián Máté
Dátum:2018
ISSN:2071-1050
Megjegyzések:aBusiness groups have been described as improving the value of the affiliated firms they control, which is often beyond the capability of standalone firms. The purpose of the current study is to analyze the financial performance of affiliates of diversified Pakistani business groups relative to standalone firms. The current study employs data from 284 Pakistani listed non-financial firms from 2008?2015. In order to test the hypotheses, two dependent variables are used, namely, accounting (Return on Assets (ROA)) and stock market (Tobin's Q) measures of performance. Specifically, this study probes and compares the performance measures of group member and standalone firms. The findings of the study suggest that business group memberships have statistically significant effects on accounting and stock market measures of firm performance. In addition, size and sales growth have an increasing effect on the performance of firms. We believe that business groups in Pakistan are efficient economic actors and can be considered responses to high transaction costs and market failures.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
business groups
financial performance
group-affiliated
institutional voids
Megjelenés:Sustainability. - 10 : 9 (2018), p. 1-19. -
További szerzők:Oláh Judit (1973-) (agrárközgazdász, logisztika) Popp József (1955-) (közgazdász) Máté Domicián (1976-) (közgazdász, informatika tanár)
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2.

001-es BibID:BIBFORM085512
035-os BibID:(cikkazonosító)3897 (Scopus)85085514966 (WOS)000537476200395
Első szerző:Atif Khan, Muhammad (okl. közgazdász)
Cím:Natural Resource Rent and Finance: The Moderation Role of Institutions / Muhammad Atif Khan, Muhammad Asif Khan, Kishwar Ali, József Popp, Judit Oláh
Dátum:2020
ISSN:2071-1050
Megjegyzések:This study empirically examines the nexuses between the natural resource rent and financial development in the context of the emerging economy of Pakistan, between 1984 and 2018, by subsuming the important role of institutional quality in this context under symmetric, asymmetric, and threshold settings. The literature to date provides no evidence on the asymmetric relationship between natural resource rent and financial development, and the moderation role of institutional quality in this connection. We show that natural resource rent negatively influences financial development, whereas institutional quality boosts financial development and positively moderates the relationship in the context of Pakistan. Also, we find a single significant threshold value of 3.097 above which the relationship of resource rent-finance turns nonlinear?as up to this threshold the coefficient is 3.228, which declines slightly to 2.804 above the threshold level. This implies that regulators should maintain at least an institutional quality level of up to 3.097 to experience the most desired financial benefits of the natural resource rent in Pakistan. Moreover, the results corroborate the existence of asymmetries in the relationship between the natural resource rent and financial development. This empirical evidence provides fresh insight for stakeholders regarding ambiguous natural resource rents and financial sector development nexuses and recommends that planning organs in Pakistan and other countries in a similar development cadre should use institutional quality as a tool to avoid the resource curse and view natural resources as a blessing rather than a curse.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 12 : 9 (2020), p. 1-24. -
További szerzők:Khan, Muhammad Asif (1976-) (közgazdász) Ali, Kishwar Popp József (1955-) (közgazdász) Oláh Judit (1973-) (agrárközgazdász, logisztika)
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3.

001-es BibID:BIBFORM074695
035-os BibID:(cikkazonosító)857 (WOS)000404127800182 (Scopus)85019955009
Első szerző:Bai Attila (agrár-közgazdász)
Cím:The Significance of Forests and Algae in CO2 Balance : a Hungarian Case Study / Attila Bai, József Popp, Károly Pető, Irén Szőke, Mónika Harangi-Rákos, Zoltán Gabnai
Dátum:2017
ISSN:2071-1050
Megjegyzések:This study presents the sequestration and emissions of forests and algae related to CO2 while providing a comparison to other biomass sources (arable crops, short rotation coppices). The goal of the paper is to analyze the impact of the current CO2 balance of forests and the future prospects for algae. Our calculations are based on data, not only from the literature but, in the case of algae, from our own previous experimental work. It was concluded that the CO2 sequestration and natural gas saving of forests is typically 3.78 times higher than the emissions resulting from the production technology and from the burning process. The economic and environmental protection-related efficiency operate in opposite directions. The CO2 sequestration ability of algae can primarily be utilized when connected to power plants. The optimal solution could be algae production integrated with biogas power plants, since plant sizes are smaller and algae may play a role, not only in the elimination of CO2 emissions and the utilization of heat but also in wastewater purification.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
forest
algae
carbon dioxide
sequestration
emissions
Megjelenés:Sustainability. - 9 : 5 (2017), p. 1-24. -
További szerzők:Popp József (1955-) (közgazdász) Pető Károly (1958-) (agrármérnök) Szőke Irén (1988-) Harangi-Rákos Mónika (1985-) (gazdasági agrármérnök) Gabnai Zoltán (1988-) (gazdasági agrármérnök)
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4.

001-es BibID:BIBFORM075715
035-os BibID:(cikkazonosító)3847 (Scopus)85055576047 (WOS)000451531700021
Első szerző:Baloch, Muhammad Saad
Cím:Role of domestic financial reforms and internationalization of non-financial transnational firms : evidence from the Chinese market / Muhammad Saad Baloch, Abubakr Saeed, Ishtiaq Ahmed, Judit Oláh, József Popp, Domicián Máté
Dátum:2018
ISSN:2071-1050
Megjegyzések:The successful internationalization process of Chinese firms which enhances the sustainability of the Chinese economy receives massive research attention. Studies emphasize that firm's motives and institutional voids play a pivotal role in getting benefits from the internationalization process, but the factors that initiated this process have been overlooked. The objective of this study is to explore the impact of those institutional factors which initiated the internationalization process. This study reveals that institutional factors of cross listing and increased financial availability induced the internationalization process of Chinese firms. Using the financial data of non-financial firms for the period of 2005-2015, we demonstrate that the domestic financial reforms initiated the internationalization process that helps Chinese economies to achieve sustainable economic development. The study also finds that state-ownership helped firms to gain more from increased financial availability than the stand-alone firms. The study concludes that the open business environment helped firms to survive and sustain the international pressure successfully and maintain their sustainable performance.
Tárgyszavak:Társadalomtudományok Közgazdaságtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
institutional factors
financial reforms
credit availability
cross listing
green financing
sustainable economic development
multinational enterprises
emerging economy
Megjelenés:Sustainability. - 10 : 11 (2018), p. 1-16. -
További szerzők:Saeed, Abubakr (közgazdász) Ahmad Ishtiaq (1978-) (közgazdász) Oláh Judit (1973-) (agrárközgazdász, logisztika) Popp József (1955-) (közgazdász) Máté Domicián (1976-) (közgazdász, informatika tanár)
Pályázati támogatás:ÚNKP-18-4-DE-153
ÚNKP
EFOP-3.6.3-VEKOP-16-2017-00007
EFOP
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5.

001-es BibID:BIBFORM096422
035-os BibID:(cikkazonosító)10281 (Scopus)85115169106 (WOS)000701518700001
Első szerző:Duan, Cheche
Cím:The Misunderstanding of China's Investment, and a Clarification: "Faustian Bargain" or "Good Bargain"? On the OFDI Data of Central and Eastern Europe / Cheche Duan, Yicheng Zhou, Dehong Shen, Shengqiao Lin, Wei Gong, József Popp, Judit Oláh
Dátum:2021
ISSN:2071-1050
Megjegyzések:The close development of the economic relations between China and Central and Eastern Europe (CEE) since 2012 has triggered the European Union's criticism of China's foreign policy towards Eastern European countries. The European Union believes that China's investment growth has led to a governance crisis in CEE countries. Based on the global governance indicators of the World Bank and the outward foreign direct investment (OFDI) data of the Ministry of Commerce of China, this paper conducts a test using the panel data model and the r gression discontinuity method. An imbalanced panel dataset is adopted, covering 16 CEE countries from 2000 to 2018. The empirical research results indicate that, representing a small proportion of the investment inflows to CEE countries, China is not yet able to exert a domination effect on the region, and China's economic power is far less than the European Union's regulatory influence. Furthermore, China's share of the OFDI in CEE has a U-shaped effect on the regulatory quality of host countries, and the two have a mutually causal relationship. Specifically, the impact on the host country's regulatory quality is first manifested in the Shanghai effect, and when China's share reaches a certain level, it is manifested in the California effect. The U-shaped effect is associated with the strategic factors of CEE countries and China's positive contribution to good global governance.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 13 : 18 (2021), p. 1-25. -
További szerzők:Zhou, Yicheng Shen, Dehong Lin, Shengqiao Gong, Wei Popp József (1955-) (közgazdász) Oláh Judit (1973-) (agrárközgazdász, logisztika)
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6.

001-es BibID:BIBFORM074638
035-os BibID:(cikkazonosító)2111 (Scopus)85034428703 (WOS)000416793400189
Első szerző:Gyalog Gergő (közgazdász)
Cím:Constraining Factors in Hungarian Carp Farming : an Econometric Perspective / Gyalog Gergő, Oláh Judit, Békefi Emese, Lukácsik Mónika, Popp József
Dátum:2017
ISSN:2071-1050
Megjegyzések:Although carp farming had a key role in the Blue Revolution at a global level, European carp aquaculture has stagnated over the past 25 years without achieving any productivity gains. The objective of this study was to identify the factors and mechanisms constraining production and productivity growth in pond-based carp farming in Hungary, as the country is a good representative of the EU pond-based farming sector. By using data from 44 carp farms, different specifications of the Cobb-Douglas production function were parameterized to investigate the determinants of yields and to assess the extent of economies of scale. Descriptive statistics show that large differences exist in productivity between individual farms, meaning that it is hard to implement technical standards and to ensure repeatability in extensive carp farming technology. Econometric analysis demonstrates that economies of scale do not prevail in pond-based farming in Hungary, so a concentration of farms would not stimulate a growth in carp farming. This may explain the stagnation of carp aquaculture, as the only European aquaculture segments which can grow are those that can exploit economies of scale. Further analysis demonstrates that labour is an important factor of production, and a decreasing workforce may constrain the intensification process of production. On the other hand, mechanisation did not prove to be a significant contributing factor to yields, indicating that large investment in equipment has a limited role in carp farming.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Cobb-Douglas production function
carp farming
Hungarian aquaculture
productivity
input efficiency
diseconomies of scale
Megjelenés:Sustainability. - 9 : 11 (2017), p. 1-13. -
További szerzők:Oláh Judit (1973-) (agrárközgazdász, logisztika) Békefi Emese (1976-) (agrármérnök) Lukácsik Mónika (agrár-közgazdász) Popp József (1955-) (közgazdász)
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7.

001-es BibID:BIBFORM085232
035-os BibID:(cikkazonosító)3556 (Scopus)85085516859 (WOS)000537476200055
Első szerző:Islam, Mollah Aminul
Cím:Financial Development and Foreign Direct Investment-The Moderating Role of Quality Institutions / Mollah Aminul Islam, Muhammad Asif Khan, József Popp, Wlodzimierz Sroka, Judit Oláh
Dátum:2020
ISSN:2071-1050
Megjegyzések:Considering the importance of foreign direct investment (FDI) inflows for the sustainable economic advancement of a host country, this paper investigates the financial development and FDI nexus, using institutional quality as a moderator. The sample consists of 79 Belt and Road Initiative (BRI) partner countries, as these countries are entering a new age of integration, foreign trade, and mutual development. The empirical findings of conventional and robust estimators show that the financial development of BRI host countries significantly attracts FDI, while the institutional quality plays a significantmoderating role in this relation. The in-depth analysis offers the insight that financial markets are less attractive to FDI relative to financial institutions. Thus, policymakers are advised to uphold sound financial institutions to make the country more attractive to overseas investors, while concentration on financial markets may multiply the benefits of FDI. The results are robust to alternative proxies of the key variables and alternative methodologies.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 12 : 9 (2020), p. 1-22.p. -
További szerzők:Khan, Muhammad Asif (1976-) (közgazdász) Popp József (1955-) (közgazdász) Sroka, Wlodzimierz Oláh Judit (1973-) (agrárközgazdász, logisztika)
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8.

001-es BibID:BIBFORM083487
035-os BibID:(cikkazonosító)1223 (WOS)000524899604004 (Scopus)85079870327
Első szerző:Khan, Muhammad Asif (közgazdász)
Cím:Asymmetric Impact of Institutional Quality on Tourism Inflows Among Selected Asian Pacific Countries / Muhammad Asif Khan, József Popp, Mirza Nouman Ali Talib, Zoltán Lakner, Muhammad Atif Khan, Judit Oláh
Dátum:2020
ISSN:2071-1050
Megjegyzések:From an idealistic viewpoint, the existence of the tourism industry in a country/region is a blessing because of its anticipated sustainable economic benefits. To turn this idealistic state into a realistic one, institutions need to play a pivotal role in optimizing the desired incentives. The present study examines the asymmetric role of institutional quality in stimulating tourism inflows (receipts and arrivals) in selected Asia Pacific countries involved in tourism. The previous literature has established that improving institutional quality attracts tourism inflows to a destination. However, the literature fails to identify the specific point (threshold level) above (below) which the relationship turns positive (negative). To the best of our knowledge, this is the first study that estimates the asymmetries in the nexus of institutions and tourism inflows, using robust nonlinear autoregressive distributed lag approach. Our results show that the tourism inflow in Asian Pacific countries responds asymmetrically to any changes in institutional quality, and there is a single threshold of 7.52 points, where the impact of institutional quality reverses. We conclude that our findings are robust to the alternative measures of tourism inflows. The study o ers useful policy inputs for devising short and long-run policies for the betterment of the institutional framework in the region by understanding the asymmetric impact of institutional quality on tourism inflow.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 12 : 3 (2020), p. 1-16. -
További szerzők:Popp József (1955-) (közgazdász) Ali Talib, Mirza Nouman Lakner Zoltán (1959-) (közgazdász) Atif Khan, Muhammad (1989-) (okl. közgazdász) Oláh Judit (1973-) (agrárközgazdász, logisztika)
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9.

001-es BibID:BIBFORM073002
035-os BibID:(cikkazonosító)1090 (Scopus)85045036239 (WOS)000435188000194
Első szerző:Lakner Zoltán (agrárökonómia)
Cím:Building Coalitions for a Diversified and Sustainable Tourism : two Case Studies from Hungary / Lakner Zoltán, Kiss Anna, Merlet Ivan, Oláh Judit, Máté Domicián, Grabara Janusz, Popp József
Dátum:2018
ISSN:2071-1050
Megjegyzések:The development of the tourism sector has been a question of strategic importance for Hungary, a small, open economy with limited natural resources. At the same time, these efforts often generate considerable environmental conflicts, decreasing the sustainability of the environment. To understand the potential methods of sustainable tourism development, and to develop the optimal policy, it is essential to clarify the actors, their systems of interest and the potential ways of forging coalitions between them. The article presents an analysis of two case studies of rural tourism development: the "softening" of tourism at the most important touristic attraction in Hungary, Lake Balaton; and the conflicts arising from wine tourism development. Based on institutional economics, principle?agent theory and strategic management, and applying the MACTOR method, the authors identify the key actors, present the network of their mutual influences and goals, determine the most important conflicts and highlight the potential coalitions between them from the point of view of sustainable rural tourism development, as well as ways to further develop the regulatory environment. Based on this analysis, the article proves: (1) the importance of the modernization and re-organization of the public administration structure, focusing on optimal utilization of resources, as opposed to attaching to traditions; (2) the importance of forming clusters of different partners; (3) the strengthening of the knowledge base of decisions concerning sustainable tourism management; and (4) increasing conscious planning, based on the inclusion of different interest groups and long-term prognoses in local decision making, minimises the environmental burden of tourism.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
actors analysis
institutional economics
cluster development
decision making
MACTOR model
strategic planning
Megjelenés:Sustainability. - 10 : 4 (2018), p. -1-23. -
További szerzők:Kiss Anna (1989-) (közgazdász) Merlet Ivan (1976-) (közgazdász) Oláh Judit (1973-) (agrárközgazdász, logisztika) Máté Domicián (1976-) (közgazdász, informatika tanár) Grabara, Janusz K. (1973-) (közgazdász) Popp József (1955-) (közgazdász)
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10.

001-es BibID:BIBFORM079218
035-os BibID:(cikkazonosító)3125 (WOS)000472632200130 (Scopus)85067310909
Első szerző:Lakner Zoltán (közgazdász)
Cím:From Basic Research to Competitiveness: An Econometric Analysis of the Global Pharmaceutical Sector / Zoltán Lakner, Anna Kiss, József Popp, Zoltán Zéman, Domicián Máté, Judit Oláh
Dátum:2019
ISSN:2071-1050
Megjegyzések:The pharmaceutical sector is a ?agship of the economy in most developed countries and is one of the most research-intensive sectors of modern economies. The aim of this paper was to determine the mutual relationships between the research and development (R&D) resources, various indicators of scienti?c performance and the competitiveness of the sector. We carried out a cointegration analysis of a time series of R+D resources, the number of academic papers published, aswellaspatentsandthecompetitivenessofthissectorinvariousdevelopedstates. Theeconometric analysis of time series is built on panel cointegration models. Based on the combination of di?erent comprehensive and coherent international databases and applying the latest methods of modern time series analysis, the paper proves that, in most developed countries, a direct, signi?cant, causal, lagged relationship between the monetary resources allocated to R&D and the number of academic papers, as well as the number of patents can be observed. In most cases, a causal relationship can be demonstrated between the number of academic papers and patents, but vice versa, this fact is not provable. This study highlights the complexity of innovation systems in the pharmaceutical sector. The results prove only a weak connection between the number of patents and the number of publications. Whenevaluatingthee?ciencyoftheutilisationofresourcesallocatedtopharmaceutical R+D, the effect of the time lag should be considered.
Tárgyszavak:Társadalomtudományok Közgazdaságtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 11 : 11 (2019), p. 1-17. -
További szerzők:Kiss Anna (1989-) (közgazdász) Popp József (1955-) (közgazdász) Zéman Zoltán (1969-) (agrár-közgazdász) Máté Domicián (1976-) (közgazdász, informatika tanár) Oláh Judit (1973-) (agrárközgazdász, logisztika)
Pályázati támogatás:130377
OTKA
EFOP-3.6.3-VEKOP-16-2017-00005
EFOP
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11.

001-es BibID:BIBFORM084204
035-os BibID:(cikkazonosító)2342 (Scopus)85082850749 (WOS)000523751400189
Első szerző:Mesterházy Ákos
Cím:Losses in the grain supply chain: causes and solutions. Sustainability / Ákos Mesterházy, Judit Oláh, József Popp
Dátum:2020
ISSN:2071-1050
Megjegyzések:Global grain production needs a significant increase in output in the coming decades in order to cover the food and feed consumption needs of mankind. As sustainability is the key factor in production, the authors investigate global grain production, the losses along the value chain, and future solutions. Global wheat, maize, rice, and soybean production peaked at 2.102 million tons (mt) of harvested grain in 2018. Pre-harvest losses due to diseases, animal pests, weeds, and abiotic stresses and harvest destroy yearly amount to about 35% of the total possible biological product of 3.153 mt, with 1051.5 mt being lost before harvest. The losses during harvest and storage through toxin contamination are responsible for 690 mt, with a total of 1.741 mt or 83% of the total newly stored grain. Limited cooperation can be experienced between scientific research, plant breeding, plant protection, agronomy, and society, and in addition, their interdependence is badly understood. Plant breeding can help to reduce a significant part of field loss up to 300 mt (diseases, toxins, water and heat stress) and up to 220 mt during storage (toxin contamination). The direct and indirect impact of pest management on production lead to huge grain losses. The main task is to reduce grain losses during production and storage and consumption. Better harvest and storage conditions could prevent losses of 420 mt. The education of farmers by adopting the vocational school system is a key issue in the prevention of grain loss. In addition, extension services should be created to demonstrate farmers crop management in practice. A 50% reduction of grain loss and waste along the value chain seems to be achievable for the feeding 3?4 billion more people in a sustainable way without raising genetic yields of crop cultivars.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Sustainability. - 12 : 6 (2020), p. 1-16. -
További szerzők:Oláh Judit (1973-) (agrárközgazdász, logisztika) Popp József (1955-) (közgazdász)
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12.

001-es BibID:BIBFORM075415
035-os BibID:(Scopus)85054069142 (WOS)000448559400133 (cikkazonosító)3491
Első szerző:Nagy Judit (közgazdász)
Cím:The Role and Impact of Industry 4.0 and the Internet of Things on the Business Strategy of the Value Chain - The Case of Hungary / Judit Nagy, Judit Oláh, Edina Erdei, Domicián Máté, József Popp
Dátum:2018
ISSN:2071-1050
Megjegyzések:In the era of industrial digitalization, companies are increasingly investing in tools and solutions that allow their processes, machines, employees, and even the products themselves, to be integrated into a single integrated network for data collection, data analysis, the evaluation of company development, and performance improvement. To study the impact of Industry 4.0 on the company we used Porter's (1985) value chain model, which is particularly useful when paying particular attention to corporate areas which have a primary role in customer value creation. Since the primary impact of Industry 4.0 is perceived in value-creating processes, and has so far had the greatest transformative effect in this area, the model can be considered to be appropriate. The objective of our research is to discover how companies operating in Hungary interpret the phenomenon of Industry 4.0, what Internet of Things (IoT) tools they use to support their processes, and what critical issues they face during adaptation. We applied a dual methodology in our investigation: We sent an online questionnaire to manufacturing and logistical service companies to investigate the IoT tools they use, and the problems they face, and received 43 answers we could evaluate. We also conducted four expert interviews with manufacturing firms to get deeper insights into the application, critical issues and development phases of IoT tools. During our research, we found that the spread of real-time data across companies?given the availability of appropriate analytical tools and methods?can have a significant impact on the entire company. In the case of CPS (Cyber Physical System), CPPS and Big Data Technologies, companies using them have been evaluated as having a higher level of logistic service, more efficient processes with their partners, improved cooperation between certain logistic functions, and higher market and financial performance and competitiveness. Applying more efficient production processes, and achieving better productivity and economies of scale, might also result in increased economic sustainability. Furthermore, we have found that companies have started on the path to digital evolution, and investments of this type have already begun.
Tárgyszavak:Társadalomtudományok Gazdálkodás- és szervezéstudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Internet of Things (IoT)
Industry 4.0
business intelligence
Cyber Physical System
value chain
sustainable development
Megjelenés:Sustainability. - 10 : 10 (2018), p. 1-25. -
További szerzők:Oláh Judit (1973-) (agrárközgazdász, logisztika) Erdei Edina (1992-) (gazdaságinformatikus) Máté Domicián (1976-) (közgazdász, informatika tanár) Popp József (1955-) (közgazdász)
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