1,720,962 research outputs found
Development of a model for measuring the effects of completed investment projects on firms’ performance
Get PDFOsnovni cilj istraživanja je predstavljao razvoj modela za merenje efekata realizovanih investicionih projekata na performanse preduzeća. Procena uticaja realizovanih investicionih projekata namenjenih ulaganju u fiksnu, neto obrtnu i nematerijalnu imovinu na profitabilnost proizvodnih preduzeća je izvršena primenom analize panel podataka. Rezultati istraživanja su potvrdili empirijska očekivanja i postavljene hipoteze istraživanja da realizovani investicioni projekti utiču pozitivno na performanse preduzeća, odnosno da postoji optimalan nivo ulaganja u imovinu koji maksimizira performanse preduzeća, uz kontrolisanje određenih internih i eksternih faktora.The main goal of the research was to develop a model for measuring the effects of completed investment projects on firms’ performance. The evaluation of the impact of completed investment projects intended for investments in fixed assets, net working capital and intangible assets on profitability of manufacturing firms was performed by applying the panel data analysis. The research results confirmed the empirical expectations and research hypotheses that completed investment projects have a positive effect on firms’ performance, and that there is an optimal level of investments in assets that maximizes firms’ performance, while controlling certain internal and external factors
Simulation of the impact of energy system decarbonization on economic and environmental sustainability
Get PDFEnergetika se tradicionalno oslanjala na fosilna goriva, a ona imaju izraženi negativni uticaj na emisiju gasova koji dovode do efekta staklene bašte, odnosno na klimu i njene promene. Proces tranzicije ka sistemima koji će se dominantno oslanjati na rešenja sa nižom emisijom gasova koji dovode do efekta staklene bašte je započet širom sveta. U disertaciji je primenjen kombinovani pristup kojim se objedinjuju kvalitativni i kvantitativni podaci na osnovu kojih se pristupa izradi odgovarajućih ekonometrijskih i energetskih modela. Analizirane su mogućnosti i efekti korišćenja obnovljivih izvora energije u procesu transformacije elektroenegetskog sistema u pravcu dostizanja ekološke i ekonomske održivosti. Alat EnergyPlan je korišćen za izradu energetskih modela i simulaciju efekata tranzicije elektroenergetskog sistema.Energy has traditionally relied on fossil fuels, and they have a significant negative impact on the emission of greenhouse gases, on the climate and its changes. The process of transition to systems that will predominantly rely on solutions with lower emissions of greenhouse gases has begun worldwide. In the dissertation, a combined approach was applied, which combines qualitative and quantitative data, as the basis of econometric and energy models. The possibilities and effects of using renewable energy sources in the process of transforming the power system towards environmental and economic sustainability were analyzed. The EnergyPlan tool was used to create energy models and simulate the effects of the power system transition
Development of a model for measuring the effects of completed investment projects on firms’ performance
Get PDFOsnovni cilj istraživanja je predstavljao razvoj modela za merenje efekata realizovanih investicionih projekata na performanse preduzeća. Procena uticaja realizovanih investicionih projekata namenjenih ulaganju u fiksnu, neto obrtnu i nematerijalnu imovinu na profitabilnost proizvodnih preduzeća je izvršena primenom analize panel podataka. Rezultati istraživanja su potvrdili empirijska očekivanja i postavljene hipoteze istraživanja da realizovani investicioni projekti utiču pozitivno na performanse preduzeća, odnosno da postoji optimalan nivo ulaganja u imovinu koji maksimizira performanse preduzeća, uz kontrolisanje određenih internih i eksternih faktora.The main goal of the research was to develop a model for measuring the effects of completed investment projects on firms’ performance. The evaluation of the impact of completed investment projects intended for investments in fixed assets, net working capital and intangible assets on profitability of manufacturing firms was performed by applying the panel data analysis. The research results confirmed the empirical expectations and research hypotheses that completed investment projects have a positive effect on firms’ performance, and that there is an optimal level of investments in assets that maximizes firms’ performance, while controlling certain internal and external factors
Simulation of the impact of energy system decarbonization on economic and environmental sustainability
No full textEnergetika se tradicionalno oslanjala na fosilna goriva, a ona imaju izraženi negativni uticaj na emisiju gasova koji dovode do efekta staklene bašte, odnosno na klimu i njene promene. Proces tranzicije ka sistemima koji će se dominantno oslanjati na rešenja sa nižom emisijom gasova koji dovode do efekta staklene bašte je započet širom sveta. U disertaciji je primenjen kombinovani pristup kojim se objedinjuju kvalitativni i kvantitativni podaci na osnovu kojih se pristupa izradi odgovarajućih ekonometrijskih i energetskih modela. Analizirane su mogućnosti i efekti korišćenja obnovljivih izvora energije u procesu transformacije elektroenegetskog sistema u pravcu dostizanja ekološke i ekonomske održivosti. Alat EnergyPlan je korišćen za izradu energetskih modela i simulaciju efekata tranzicije elektroenergetskog sistema.Energy has traditionally relied on fossil fuels, and they have a significant negative impact on the emission of greenhouse gases, on the climate and its changes. The process of transition to systems that will predominantly rely on solutions with lower emissions of greenhouse gases has begun worldwide. In the dissertation, a combined approach was applied, which combines qualitative and quantitative data, as the basis of econometric and energy models. The possibilities and effects of using renewable energy sources in the process of transforming the power system towards environmental and economic sustainability were analyzed. The EnergyPlan tool was used to create energy models and simulate the effects of the power system transition
The problem of the demand for crop insurance: The case of Serbia
Get PDFWorldwide researches of the crop insurance suggest two key problems: the lack of the insurer's interest for defining supply and on the other side, insufficient interest of farmers - potential insureds. The role of the state is necessary in promoting insurance in agriculture, as well as in financing researches that are not exclusively commercial. Having in mind numerous risks and forms of managing them, starting from the fact that risk management is the basis of economic survival of agricultural production, and the lack of previous research in this area, our research is aimed at identifying key incentive and restrictive factors that determine the demand of individual farmers for crop insurance in Serbia. Different conclusions are made on the base of 12 tested hypotheses related to the problem of promoting the demand for crop insurance. Measures of dependence that were used in this paper are Spearman's rank correlation coefficient and Pearson's contingency coefficient
TESTIRANJE EFIKASNOSTI TRŽIŠTA: PUT KA ODREĐIVANJU SUŠTINSKE VREDNOSTI
No full textThe paradigm of market equilibrium and the “efficient-market hypothesis” tied to it, dealing specifically with the behavior of capital markets, has no explanation for financial bubbles and their bursting that is leading to stock market crashes. Accordingly, the main goal of this paper is to discuss the inefficiency of markets, with examples of corporate decisions that directly abuse such inefficiency to psychologically motivate desired behavior of potential customers. To test the efficiency market hypothesis, we have used Stoxx Europe 600 index historical closing daily prices, for the period from 2012–2022. Using both non-parametric and parametric tests, such as the Kolmogorov–Smirnov test, run–test for random order, and ARIMA regression, we reject the hypothesis that the market is efficient in a weak form because it doesn’t follow a random walk. Also, basic-level problems of economic theory were analyzed, emphasizing the view that perhaps the time has come to align the fundamentals of economic theory with basic concepts that have been used in practice for years.Paradigma tržišne ravnoteže i za nju vezana „hipoteza efikasnog tržišta“, koja se posebno bavi ponašanjem tržišta kapitala, nema objašnjenja za finansijske mehure i njihovo pucanje koje dovodi do kraha berze. Shodno tome, osnovni cilj ovog rada je da se diskutuje o neefikasnosti tržišta, uz primere korporativnih odluka koje direktno zloupotrebljavaju takvu neefikasnost da bi psihološki motivisale željeno ponašanje potencijalnih kupaca. Za testiranje hipoteze efikasnosti tržišta koristili smo Stoxx Europe 600 indeks istorijskih dnevnih cena akcija u periodu od 2012–2022. Koristeći neparametarske i parametarske testove, kao što su Kolmogorov–Smirnov test, run–test i ARIMA regresija, odbacujemo hipotezu da je tržište efikasno u slabom obliku jer ne prati slučajni hod. Takođe, u radu su analizirani i osnovni problemi ekonomske teorije, naglašavajući stav da je možda došlo vreme da se fundamenti ekonomske teorije usklade sa osnovnim konceptima koji se godinama koriste u praksi
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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