Pub Date : 2021-12-31DOI: 10.14505/jmef.v7.2(13).02
Alessia Donato
We propose an examination of the current literature on innovation, taking into account, specifically, the concept of knowledge diversity and knowledge recombi- nation. We analyze bibliometric data using the software VOSviewer and we derive indications on the principle analyzed research fields, where they come from and in what directions they are going.
{"title":"The search of new knowledge in the firm’s innovation process: a literature review","authors":"Alessia Donato","doi":"10.14505/jmef.v7.2(13).02","DOIUrl":"https://doi.org/10.14505/jmef.v7.2(13).02","url":null,"abstract":"\u0000 \u0000 \u0000We propose an examination of the current literature on innovation, taking into account, specifically, the concept of knowledge diversity and knowledge recombi- nation. We analyze bibliometric data using the software VOSviewer and we derive indications on the principle analyzed research fields, where they come from and in what directions they are going. \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131641453","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}
Pub Date : 2021-06-30DOI: 10.14505/jmef.v7.1(12).02
D. Carfí
In this paper we start to construct some fundamental features of Dirac Calculus, specifically, we go inside the theory of Heisenberg continuous matrices, which, in our Schwartz Linear Algebra, are represented by Schwartz families. We distinguish the important subclass of transposable continuous matrices and give some basic and very important examples in Quantum Mechanics. So we define transposable Schwartz families and their transpose families, we prove the transposability of Dirac families and Fourier families. We find the transpose of regular-distribution families in a much general case. We define symmetric families, the analogous of symmetric ma- trices in the continuous case. We prove the symmetry of Dirac families and of Fourier families. We define Hermitian families, the analogous of Hermitian matrices in the continuous case. We prove the Hermitianity of Dirac families and of Fourier families. We define unitary families, the analogous of unitary matrices in the continuous case. We prove the unitarity of Dirac families and of the fundamental normalized de Broglie family. Then, we use the transpose of a family to find the components of the superpositions of transposable families, we give a general result and we apply this result to the Dirac families and the eigenfamilies of the vector-wave operator. We shall use the transposable families in next chapters to define the Dirac product in distribution spaces, basic product for the entire foundation of Dirac Calculus and Quantum Mechanics formalism.
{"title":"An introduction to transposable Schwartz families","authors":"D. Carfí","doi":"10.14505/jmef.v7.1(12).02","DOIUrl":"https://doi.org/10.14505/jmef.v7.1(12).02","url":null,"abstract":"\u0000 \u0000 \u0000In this paper we start to construct some fundamental features of Dirac Calculus, specifically, we go inside the theory of Heisenberg continuous matrices, which, in our Schwartz Linear Algebra, are represented by Schwartz families. We distinguish the important subclass of transposable continuous matrices and give some basic and very important examples in Quantum Mechanics. So we define transposable Schwartz families and their transpose families, we prove the transposability of Dirac families and Fourier families. We find the transpose of regular-distribution families in a much general case. We define symmetric families, the analogous of symmetric ma- trices in the continuous case. We prove the symmetry of Dirac families and of Fourier families. We define Hermitian families, the analogous of Hermitian matrices in the continuous case. We prove the Hermitianity of Dirac families and of Fourier families. We define unitary families, the analogous of unitary matrices in the continuous case. We prove the unitarity of Dirac families and of the fundamental normalized de Broglie family. Then, we use the transpose of a family to find the components of the superpositions of transposable families, we give a general result and we apply this result to the Dirac families and the eigenfamilies of the vector-wave operator. We shall use the transposable families in next chapters to define the Dirac product in distribution spaces, basic product for the entire foundation of Dirac Calculus and Quantum Mechanics formalism. \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126806101","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}
Pub Date : 2021-06-30DOI: 10.14505/jmef.v7.1(12).01
Aleksandar Vasilev
We introduce Epstein-Zin (1989, 1991) preferences into a real-business-cycle (RBC) model with government. We calibrate the model economy to Bulgarian data for the period after the currency board regime (1999-2018). We evaluate the quantitative importance of the presence of ”early resolution of uncertainty” motive for the propagation of cyclical fluctuations in Bulgaria. Allowing for Epstein-Zin preferences improves the model performance against data, and in addition this extended setup dominates the standard RBC model framework, e.g., Vasilev (2009).
{"title":"An RBC model with Epstein-Zin (non-expected-utility) recursive preferences: lessons from Bulgaria (1999-2018)","authors":"Aleksandar Vasilev","doi":"10.14505/jmef.v7.1(12).01","DOIUrl":"https://doi.org/10.14505/jmef.v7.1(12).01","url":null,"abstract":"\u0000 \u0000 \u0000We introduce Epstein-Zin (1989, 1991) preferences into a real-business-cycle (RBC) model with government. We calibrate the model economy to Bulgarian data for the period after the currency board regime (1999-2018). We evaluate the quantitative importance of the presence of ”early resolution of uncertainty” motive for the propagation of cyclical fluctuations in Bulgaria. Allowing for Epstein-Zin preferences improves the model performance against data, and in addition this extended setup dominates the standard RBC model framework, e.g., Vasilev (2009). \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132585976","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}
Pub Date : 2021-06-30DOI: 10.14505/jmef.v7.1(12).03
D. Carfí, Alessia Donato
In this study, we propose possible coopetitive strategies between countries in order to reduce environmental problems related to the meat production. In particular, the problem of factory farming and ocean degradation is studied. We propose a coopetitive strategy focused in investments promoting and suggesting the change of diet (reformulating food products towards a healthy diet based on vegetables) and improving the sustainability of production practices (production of plant-based food and reduction of the associated emissions). We create a mathematical model of interaction between two players and we completely study the associated game, suggesting a possible compromise solution.
{"title":"Factory Farming and Ocean Degradation: Coopetitive Strategies for the Environment","authors":"D. Carfí, Alessia Donato","doi":"10.14505/jmef.v7.1(12).03","DOIUrl":"https://doi.org/10.14505/jmef.v7.1(12).03","url":null,"abstract":"In this study, we propose possible coopetitive strategies between countries in order to reduce environmental problems related to the meat production. In particular, the problem of factory farming and ocean degradation is studied. \u0000We propose a coopetitive strategy focused in investments promoting and suggesting the change of diet (reformulating food products towards a healthy diet based on vegetables) and improving the sustainability of production practices (production of plant-based food and reduction of the associated emissions). \u0000We create a mathematical model of interaction between two players and we completely study the associated game, suggesting a possible compromise solution.","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"21 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133170006","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}
Pub Date : 2020-12-31DOI: 10.14505/jmef.v6.2(11).02
M. Shakoor, Alina Aftab, Ullah Nekmat, Khan NOOR ZEB, J. Farhan
Cottage industries are in limelight both in urban and rural areas of Pakistan. The handmade shawls and hats are in demand from within the country and outside world. Cottage goods have added its share to the export of the nation in the recent time despite the challenges the wearing sector faces in the present time. From many writings it could be deduced that the area has still a room for improvement if the prevailing production situation is improved. In this connection, publication in apparel sector could not only resuscitate the financial system but also attract many to this side. Dresses connected with different culture, rituals and sites could also boast the business on foreign stage, which is an additional stride. The purpose of this paper is to make suitable changes in the consumption of the available resources in order to make them more significant and to make more profit out of the given available resources. As a case study, taking the cottage industry in Swat, Pakistan. The data gathered was used to estimate the parameters of the linear programming model. The model was solved using POM QM software. The findings of the study show that the profit of the company can be improved by 15% per month by applying linear programming models.
{"title":"Applications of Linear Programming: A Case Study in Cottage Industry","authors":"M. Shakoor, Alina Aftab, Ullah Nekmat, Khan NOOR ZEB, J. Farhan","doi":"10.14505/jmef.v6.2(11).02","DOIUrl":"https://doi.org/10.14505/jmef.v6.2(11).02","url":null,"abstract":"\u0000 \u0000 \u0000Cottage industries are in limelight both in urban and rural areas of Pakistan. The handmade shawls and hats are in demand from within the country and outside world. Cottage goods have added its share to the export of the nation in the recent time despite the challenges the wearing sector faces in the present time. From many writings it could be deduced that the area has still a room for improvement if the prevailing production situation is improved. In this connection, publication in apparel sector could not only resuscitate the financial system but also attract many to this side. Dresses connected with different culture, rituals and sites could also boast the business on foreign stage, which is an additional stride. The purpose of this paper is to make suitable changes in the consumption of the available resources in order to make them more significant and to make more profit out of the given available resources. \u0000 \u0000 \u0000 \u0000 \u0000As a case study, taking the cottage industry in Swat, Pakistan. The data gathered was used to estimate the parameters of the linear programming model. The model was solved using POM QM software. The findings of the study show that the profit of the company can be improved by 15% per month by applying linear programming models. \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130680641","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}
Pub Date : 2020-12-31DOI: 10.14505/jmef.v6.2(11).03
D. Carfí
In this lecture, we shall define the ket spaces and the associated bra spaces. Firstly, we shall introduce the Diracian inner products upon Frechet spaces. Then, we shall define the Diracian pairings and ket spaces.
{"title":"Diracian structures, ket spaces and bras","authors":"D. Carfí","doi":"10.14505/jmef.v6.2(11).03","DOIUrl":"https://doi.org/10.14505/jmef.v6.2(11).03","url":null,"abstract":"\u0000 \u0000 \u0000In this lecture, we shall define the ket spaces and the associated bra spaces. Firstly, we shall introduce the Diracian inner products upon Frechet spaces. Then, we shall define the Diracian pairings and ket spaces. \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130055092","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}
Pub Date : 2020-12-31DOI: 10.14505/jmef.v6.2(11).01
A. Vasilev
We allow for an endogenous depreciation rate of physical capital stock into a real-business-cycle model with a government sector. We calibrate the model to Bulgarian data for the period following the introduction of the currency board arrangement (1999-2018). We investigate the quantitative importance of the endogenous depreciation rate, and indirectly, the capital utilization mechanism for cyclical fluctuations in Bulgaria. Allowing for endogenous variations in the depreciation rate of capital improves the model performance against data, and in addition this extended setup dominates the standard RBC model framework with constant depreciation and a fixed utilization rate of physical capital, and a fixed depreciation rate e.g., Vasilev (2009).
{"title":"The role of endogenous capital depreciation rate for business cycle dynamics: lessons from Bulgaria (1999-2018)","authors":"A. Vasilev","doi":"10.14505/jmef.v6.2(11).01","DOIUrl":"https://doi.org/10.14505/jmef.v6.2(11).01","url":null,"abstract":"\u0000 \u0000 \u0000We allow for an endogenous depreciation rate of physical capital stock into a real-business-cycle model with a government sector. We calibrate the model to Bulgarian data for the period following the introduction of the currency board arrangement (1999-2018). We investigate the quantitative importance of the endogenous depreciation rate, and indirectly, the capital utilization mechanism for cyclical fluctuations in Bulgaria. Allowing for endogenous variations in the depreciation rate of capital improves the model performance against data, and in addition this extended setup dominates the standard RBC model framework with constant depreciation and a fixed utilization rate of physical capital, and a fixed depreciation rate e.g., Vasilev (2009). \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115397623","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}
Pub Date : 2020-06-30DOI: 10.14505/jmef.v6.1(10).02
Aleksandar Vasilev
A business-cycle model with a modified cash-in-advance feature, government sector and one-period nominal wage contracts: the case of Bulgaria
以保加利亚为例:一种商业周期模型，它具有改良的预收现金特征、政府部门和一期名义工资合同
{"title":"A business-cycle model with a modified cash-in-advance feature, government sector and one-period nominal wage contracts: the case of Bulgaria","authors":"Aleksandar Vasilev","doi":"10.14505/jmef.v6.1(10).02","DOIUrl":"https://doi.org/10.14505/jmef.v6.1(10).02","url":null,"abstract":"\u0000 \u0000 \u0000A business-cycle model with a modified cash-in-advance feature, government sector and one-period nominal wage contracts: the case of Bulgaria \u0000 \u0000 \u0000","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133910996","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}
Pub Date : 2019-12-31DOI: 10.14505/JMEF.V5.2(9).02
Stephen Odedoyin
The paper considers the prospects of constructing theoretical postulates on the family that is consistent with some of the main features of economic growth. Theoretical abstraction of the parameters involved based on the intergenerational dynastic model is analyzed and compared to evidence. Descriptive and analytical technique were employed in analyzing the model. Nonmarket productivity levels and their effect on initial human capital endowment of households were also considered.
{"title":"On a Theoretical Analysis of the Family and Economic Growth","authors":"Stephen Odedoyin","doi":"10.14505/JMEF.V5.2(9).02","DOIUrl":"https://doi.org/10.14505/JMEF.V5.2(9).02","url":null,"abstract":"The paper considers the prospects of constructing theoretical postulates on the family that is consistent with some of the main features of economic growth. Theoretical abstraction of the parameters involved based on the intergenerational dynastic model is analyzed and compared to evidence. Descriptive and analytical technique were employed in analyzing the model. Nonmarket productivity levels and their effect on initial human capital endowment of households were also considered.","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128929433","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}
Pub Date : 2018-12-31DOI: 10.14505/jmef.v4.2(7).03
Rosario D’Amico
This work aims at formulating considerations to demonstrate the Goldbach's Conjecture by using a demonstration process by far easier than the usual attempts already present in literature.
{"title":"Some thoughts on the Goldbach’s Conjecture (Part II)","authors":"Rosario D’Amico","doi":"10.14505/jmef.v4.2(7).03","DOIUrl":"https://doi.org/10.14505/jmef.v4.2(7).03","url":null,"abstract":"This work aims at formulating considerations to demonstrate the Goldbach's Conjecture by using a demonstration process by far easier than the usual attempts already present in literature.","PeriodicalId":367341,"journal":{"name":"Journal of Mathematical Economics and Finance","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115030499","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}
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