Dissertations / Theses on the topic 'Structural break analysi'
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Nazare, Ronaldo. "Essays in applied factor analysis with structural breaks." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/360375/.
Full textHan, Lu. "Statistical analysis of structural breaks in discrete valued time series processes." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539614.
Full textCardosa, João. "Health expenditures in the OECD: a political economy analysis using structural breaks." Master's thesis, NSBE - UNL, 2010. http://hdl.handle.net/10362/11847.
Full textWe write this paper with the main purpose of investigating whether or not political factors influence the structural changes in health expenditure. We are not concerned about shocks as most researchers do; but instead we search for significant structural break dates and try to find a correlation between them and political changes. We choose to study health expenditure due to its relevance in terms of share on GDP and share on public expenditure and because of the continuous growth it shows over the last decades. We use probit models for our empirical tests. Public health expenditure share on GDP is found to have a statistically significant higher probability of breaking in election years which is a clear indication of possible political effects. By opposition break dates on Private health expenditure share on GDP show no correlation with elections. In addition, the probability of occurrence of breaks in public current health expenditure significantly increases in election years and the coefficients are higher and more significant in this case than the case of total public health expenditure. However, this is not verified in investment expenditure which means that elections seem to have a higher impact on short term expenses. Majority governments show a lesser probability of inducing breaks during their term in office but a higher probability before elections. Although we sometimes found statistically significant differences depending on the ideology of the respective government (i.e. left or right) we failed to achieve consistent and coherent results to allow us to establish a clear conclusion. We based our study on a data set of 23 OECD countries between the years 1960 and 2006.
Wessollek, Christine, and Pierre Karrasch. "Monitoring structural breaks in vegetation dynamics of the nature reserve Königsbrücker Heide." SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A34984.
Full textRyschkow, Stefan, and SIQI LU. "International Diversification Benefits : A Cointegrating Analysis Based on China, Europe and Russia." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40037.
Full textRudelyte, Kotryna, and Maja Bertilsson. "The Impact of EU Accession on Trade : The case of Poland, Romania and Croatia." Thesis, Internationella Handelshögskolan, Jönköping University, IHH, Nationalekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49042.
Full textRea, William Stanley. "The Application of Atheoretical Regression Trees to Problems in Time Series Analysis." Thesis, University of Canterbury. Mathematics and Statistics, 2008. http://hdl.handle.net/10092/1715.
Full textStrandås, Christina. "The phenolic complex in flaxseed : analysis, structural features and bioactivity /." Uppsala : Dept. of Food Science, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200810.pdf.
Full textTronstad, Russell Eli. "An analysis of monthly wheat, flour, and bread prices in a structural and time series framework." Thesis, Montana State University, 1985. http://etd.lib.montana.edu/etd/1985/tronstad/TronstadR1985.pdf.
Full textZghal, Mohamed Chokri. "The relationship between bread physical texture and its structure determined by digital image analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0012/MQ51824.pdf.
Full textMarczak, Martyna [Verfasser], and Thomas [Akademischer Betreuer] Beissinger. "Four essays in the empirical analysis of business cycles and structural breaks / Martyna Marczak. Betreuer: Thomas Beißinger." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2015. http://d-nb.info/1069159743/34.
Full textEdgar, David A. "Commercial short holiday breaks in Scotland : an analysis of market structure, supplier strategies and performance." Thesis, Edinburgh Napier University, 1997. http://researchrepository.napier.ac.uk/Output/5728.
Full textHellsten, Mark. "GDP per capita and the privatization of copper mines in Zambia : a time series analysis of unit root with structural breaks." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-80704.
Full textKim, Jaehoon. "Time Series Analysis of Going Private Transactions: Before and after the Sarbanes-Oxley Act." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc31538/.
Full textDE, SANTIS PAOLA. "La crisi dei mutui subprime: analisi degli effetti sui rendimenti e sul rischio sistematico nel mercato immobiliare." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1283.
Full textThis paper analyzes the effects of the subprime crisis on U.S. Real Estate Stocks, which plays a significant role in the current crisis. By analyzying, by means of the Fama & French three factor model, the return on the REIT index, which is considered a proxy for the U.S. Real Estate securities trend, and the return on the S&P500 yield, which may be interpreted as a proxy for U.S. market portfolio. I found evidence of an increase in the beta coefficient in 2007 followed by a reversion to the initial value in 2009. Moreover, I found evidence of the presence of structural breaks. The results tend to confirm the presence of the â Asimmetric REIT Beta Puzzleâ , previously analyzed in literature.
Elseidi, Mohammed. "Quantile regression-based seasonal adjustment." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3423191.
Full textTorgovitski, Leonid [Verfasser], Josef G. [Gutachter] Steinebach, WOLFGANG [Gutachter] WEFELMEYER, and Piotr S. [Gutachter] Kokoszka. "Hilbert Space Valued Signal Plus Noise Models: Analysis of Structural Breaks under High Dimensionality and Temporal Dependence / Leonid Torgovitski ; Gutachter: Josef G. Steinebach, Wolfgang Wefelmeyer, Piotr S. Kokoszka." Köln : Universitäts- und Stadtbibliothek Köln, 2016. http://d-nb.info/1122262329/34.
Full textSurdeanu, Laura. "Essays on Non-Stationary Panel Analysis." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/131310.
Full textGarzón, Lloría Raquel. "Análisis estructural de los productos derivados de cereales y su aplicación en la optimización de procesos y productos." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/166856.
Full text[CA] La inspecció visual és un paràmetre de qualitat que descriu tant l'aspecte extern com l'estructura interna en els productes derivats de cereals. L'anàlisi digital d'imatge (ADI) és una eina àmpliament utilitzada en diversos camps per a processar i analitzar els objectes que observem visualment. No obstant això, malgrat el seu potencial, ha sigut escassament explotat en l'àmbit d'aliments. L'estructura de la molla dels productes derivats de cereals és un dels paràmetres característics del pa i en aquest context és fonamental realitzar el seguiment dels canvis estructurals que es produeixen durant el procés o a causa de les modificacions en la formulació. Per això, l'objectiu principal de la present tesi doctoral va ser definir la interrelació entre l'estructura i paràmetres de qualitat dels diferents tipus de masses i productes enfornats, així com estendre la utilitat de l'ADI i el seu ús per a optimitzar els processos i les formulacions en productes enfornats. Per a això, en primer lloc, es van establir les condicions òptimes de captura i es va estudiar la manera de millorar la detecció de les vores. Posteriorment es va avaluar el potencial de l'anàlisi d'imatge per a quantificar els canvis estructurals ocorreguts en la formació de gels de midó en un analitzador ràpid de força. Seguidament, es va estudiar l'impacte en l'estructura de l'addició o substitució de diferents ingredients o additius en pans amb glútens i sense glútens. I finalment es van investigar les possibles correlacions entre els resultats obtinguts de la caracterització tecnològica (perfil de textura, estructura de la molla, humitat) enfront de la percepció sensorial (propietats del bol, masticació i deglució). L'ADI va permetre quantificar les diferents estructures obtingudes amb els diferents midons. A més, l'estudi va revelar les diferències en el temps necessari per a formar una estructura homogènia i ben distribuïda, que fou dependent de l'origen del midó. La modificació de la formulació de pans amb gluten o sense va requerir de l'adaptació del procés i va permetre obtindre diferents estructures atesos els ingredients /additius estudiats. L'ADI va resultar ser una eina eficaç per a detectar i quantificar els canvis originats a l'entorn estructural, en massa i producte final. A més, els canvis quantificats mitjançant ADI van obtindre correlacions estadísticament significatives amb els diversos paràmetres estudiats de percepció sensorial, com són l'adhesivitat del bol i el temps total per a mastegar i deglutir una mostra. Per tant, l'ADI va resultar una eina prou específica i no destructiva, que va permetre caracteritzar l'impacte del canvi de la formulació en la distribució alveolar de pans amb glutens i sense. Tot i existint relació entre aquest i els paràmetres utilitzats habitualment en la caracterització de productes derivats de cereals, així com amb la percepció sensorial.
[EN] Visual inspection is a quality parameter that describes both the external appearance as the internal structure in cereal-based products. Digital image analysis (DIA) is a tool widely used in several fields to process and analyse objects visually observed by the human eye. However, despite of its potential, it has been barely explored for food analysis purposes. Crumb structure in cereal-derived products is one of the most characteristic parameters in bread. Due to this, following up the structural changes caused by the process or by the formulation changes, is of fundamental importance. For that reason, the main target of this thesis was the definition of the relationship between the structure and the quality parameters of dough and baked products. Moreover, extending the DIA utility and its use to improve process and mixes in baked products represented other main objective of this work. To do that, first, the optimal capture conditions were established and the way to improve the edge detection was studied. Afterwards, image analysis was evaluated to quantify the structural changes that happened during the starch gels formation in a fast force analyser. Then, the impact on the structure by adding or replacing different ingredients or additives in gluten-free breads was studied. Finally, the possible correlations between the results obtained from technological characterization (texture profile, crumb structure, moisture content) versus sensory perception (bolus properties, chewing and swallowing) were also investigated. DIA allowed the quantification of the different structures obtained from different starches. In addition, the study revealed the differences in time needed to form a homogeneous and well-distributed structure, which was dependent on the origin of the starch. Formulation modification in bread with or without gluten required a process adjustment that allowed to obtain different structures depending on the ingredients / additives studied. DIA has been proved to be an effective tool for detecting and quantify changes originated at the structural, dough and final product levels. In addition, the changes quantified by DIA obtained statistically significant correlations with several parameters studied for the sensory perception, such as bolus adhesion and total time to chew and swallow the sample. Therefore, DIA was a sufficiently specific and non-destructive tool, which allowed to characterize the impact of the formulation change on the bread cell distribution with and without gluten. There being a relationship between this, and the parameters usually used in cereal products characterization, as well as sensory perception.
Authors acknowledge the financial support of the Spanish Ministry of Economy and Competitiveness (Projects AGL2011-23802 and AGL2014-52928-C2-1-R), the European Regional Development Fund (FEDER) and Generalitat Valenciana (Projects Prometeo 2012/064 and Prometeo 2017/189), the Spanish Ministry of Science, Innovation and Universities (RTI2018-095919-B-C21), and the European Regional Development Fund. This work is based upon the work from COST Action 18101 SOURDOMICS – Sourdough biotechnology network towards novel, healthier and sustainable food and bioprocesses, the European Regional Development Fund and the joint project between research group from IATA-CSIC and the research groups of Nutriomics and CIDPRO from Tecnologico de Monterrey, Mexico.
Garzón Lloría, R. (2021). Análisis estructural de los productos derivados de cereales y su aplicación en la optimización de procesos y productos [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/166856
TESIS
Jalles, Diogo Oom de Sousa Tovar. "Weak-form efficiency of equity energy exchange traded funds." Master's thesis, Instituto Superior de Economia e Gestão, 2012. http://hdl.handle.net/10400.5/10865.
Full textO principal objetivo desta dissertação de final de mestrado é aferir se os Exchange Traded Funds (ETF) Energéticos são eficientes na forma fraca. Para o período compreendido entre 2008 e 2012 selecionámos todos os ETFs energéticos que são negociados no mercado de capitais dos Estados Unidos, com uma data de emissão anterior a 2008. A amostra selecionada é composta por 26 ETFs e foram usados os dados históricos dos preços diários para aplicar vários testes: testes de autocorrelação, testes de runs, testes de raízes unitárias admitindo quebras estruturais, análise de raízes unitárias em painel e testes de rácio de variância. Estes testes permitiram-nos concluir que a variação dos preços dos ETFs Energéticos seguem um passeio aleatório e que a hipótese de eficiência fraca não é rejeitada.
The main purpose of this final master dissertation is to assess the weak-form efficiency of Equity Energy Exchange Traded Funds (ETF). For the period of 2008-2012 we selected all equity energy ETFs traded in the U.S. stock market with inception date before 2008. The sample selected, is composed by 26 ETFs and we make use of full daily historical data and apply various tests: autocorrelation tests, runs test, unit roots structural breaks tests, panel unit roots analysis and variance ratio tests. These tests allow us to conclude that equity energy ETFs price changes follow a random walk, and so the weak-form efficiency hypothesis is not rejected.
Ftiti, Zied. "Politique de ciblage d’inflation : règles de conduites, efficacité, performance." Thesis, Lyon 2, 2010. http://www.theses.fr/2010LYO22005/document.
Full textThe inflation targeting policy (ITP) was born after the failure of many monetary policies. However, the ITP was adopted without inherent theory which raised many discussions. In this dissertation, we study the most important debates. In the first chapter, we defined the ITP. Then, we treat the question of the optimal rule conduct. We show that the optimal monetary rule is a type Taylor rule under a Forward-Looking version and which can be linear or nonlinear. In the third chapter, we focus on the discussion about the relevance of the inflation targeting policy. To study this point we use the evolutionary spectral analysis to model the inflation series and we test then, if the ITP cause a structural break. Our results show the relevance of the ITP. The last discussion in this work is to check the macroeconomic performance of the ITP. The main idea is to consider the ITP as economically efficient when it generates a stable monetary environment. The latter is considered as stable when a long-run equilibrium exists to which the paths of economic variables (inflation rate, interest rate and GDP growth) converge. The convergence of the variables’ paths implies that these variables are more predictable and implies a less uncertainty in the economic environment. To measure the degree of convergence between economic variables, we propose, in this paper, a dynamic time-varying variable presented in the frequency approach named cohesion. This variable is estimated from the evolutionary co-spectral theory. The results show that the ITP is a relevance policy and generate a good performance
Silva, Edson Schrot da. "O sistema brasileiro da inovação e seus desafios perante questões políticas, econômicas e sociais." Universidade Presbiteriana Mackenzie, 2014. http://tede.mackenzie.br/jspui/handle/tede/1136.
Full textUniversidade Presbiteriana Mackenzie
This work consists of a systematic review of legislation regulating and structure the innovation theme, presenting the concept, characteristics, types, principles, scope, system adopted and how they are interpreted and applied by the various standards bodies that oversee this subject in the country. Deepening of the subject, it was observed that innovation transcends technological issue and reflects aspects involving the political and economic rights such as legal certainty, state intervention, economic domain, culture aspects and social values. Thus, when confronted with the concept of innovation to Article 17 of Law no 11.196/2005. This is not possible to study it without reflecting on legal certainty, the same is repeated when studying the Brazilian System of Innovation that relies on the principle of effectiveness of Article 37, caput, of the Constitution of the Federative Republic of Brazil of 1988 and the guiding principles of innovation, Articles 218 and 219 of the same legislative instrument, especially when compared with other countries, in the view of interventionist government actions and economic dominance the issue of industrial privileges and incentives. In the economic field there are questions about intervention, economic structuralism, economic dominance through innovation, industrial privileges and tax breaks are presented, which always supported by reviews of their subjects, whose perspective involves literature review, research with official sites, administrative and judicial decisions.
Este trabalho apresenta uma análise sistemática da estrutura e da legislação que regulamenta o tema inovação no país. Na pesquisa, denota-se que a inovação é um tema transversal e reflete questões políticas, jurídicas, econômicas e sociais como democracia, domínio econômico, intervenção estatal, segurança jurídica, tecnologia, cultura e valores sociais, sendo todos devidamente trabalhados de maneira aprofundada e entrelaçada nos capítulos do presente estudo. Ao se defrontar, por exemplo, com o conceito de inovação do artigo 17, da Lei no 11.196/2005, estuda-se a sua indeterminação, o que traz à baila reflexões pontuais e inéditas sobre sua segurança jurídica. Outrossim, quando se retrata os resultados atuais das políticas e estruturas adotadas no país para o assunto, exige-se um aprofundamento sociológico da cultura de inovação existente e do papel dos agentes da inovação como Governo, Universidades, Centros de Pesquisas, Empresas e Movimentos Sociais em sua disseminação. Também são retratados neste ponto, os artigos 218 e 219 da Constituição da República Federativa do Brasil de 1988; princípio da eficiência do artigo 37°, caput, do mesmo diploma normativo, com método comparativo com outros países; e, princípio democrático inspirando as políticas e decisões dos órgãos de inovação do país. No campo econômico são apresentadas questões sobre intervenção, estruturalismo econômico, domínio econômico pela inovação, privilégios industriais e incentivos fiscais, cuja ótica envolve revisão bibliográfica, consulta a sítios oficiais de pesquisa, decisões administrativas e judiciais inerentes.
Guldbacke, Lund Linnéa. "Tystnaden: Makten, rösten och talet : En analys av tystnaden som kontrollinstrument i Vegetarianen och brun flicka drömmer." Thesis, Umeå universitet, Institutionen för kultur- och medievetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-156220.
Full textPASOTTI, ANDREA. "Price Transmission, Shocks and Structural Breaks: An Application to Bread and Tortilla Food Chains in El Salvador." Doctoral thesis, 2010. http://hdl.handle.net/2158/558297.
Full textJiang, Yu Geweke John. "Inference and prediction in a multiple structural break model of economic time series." 2009. http://ir.uiowa.edu/etd/244/.
Full text"Structural breaks estimation methods for time series data." 2007. http://library.cuhk.edu.hk/record=b5893210.
Full textThesis (M.Phil.)--Chinese University of Hong Kong, 2007.
Includes bibliographical references (leaves 42-44).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 2 --- Modelling Piecewise AR model --- p.4
Chapter 2.1 --- Background --- p.4
Chapter 2.2 --- Introduction to Auto-FARM --- p.5
Chapter 2.3 --- Minimum Description Length --- p.6
Chapter 2.4 --- Genetic Algorithm --- p.9
Chapter 2.5 --- Reproduction Rules --- p.10
Chapter 3 --- Bayesian-SCAD Approach --- p.14
Chapter 3.1 --- Estimation via Penalty Function --- p.15
Chapter 3.2 --- Introduction to SCAD --- p.17
Chapter 3.3 --- Local Quadratic Approximation of SCAD --- p.20
Chapter 3.4 --- Bayesian Formulation and GA Implementation --- p.22
Chapter 4 --- Simulation Study --- p.25
Chapter 4.1 --- Piecewise AR Process from Davis et al. (2006) --- p.25
Chapter 4.2 --- Piecewise Seasonal AR Process --- p.29
Chapter 5 --- Real Data Analysis --- p.33
Chapter 5.1 --- Description and Source of Data --- p.33
Chapter 5.2 --- Model Fitting --- p.36
Chapter 5.3 --- Prediction Results --- p.39
Chapter 6 --- Conclusion --- p.40
Bibliography --- p.42
Chen, Chien-Te, and 陳健德. "An empirical analysis of fiscal sustainability:Evidence from cointegration with structural breaks." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/xw8px7.
Full text國立高雄應用科技大學
金融資訊研究所
101
The paper has three main empirical study purposes. First, we test if the fiscal sustainability exists for the 13 countries in APEC organization, allowing for an unknown break in the co-integration analysis. Second, we test if thirteen countries’ fiscal is strong sustainability when a country’s fiscal is sustainable. Finally, after we find out a structural break year, we want to know a short term causality of a country government’s revenue and expense for thirteen countries. Empirical results have four points. First, all of countries have one structural break in the co-integration relationship. Second, most of countries match fiscal sustainability. Third, only some counties match strong sustainability when some counties’ fiscal is sustainable. Fourth, all of ten countries’ short term fiscal revenue and expense have one way causality relationship by Granger causality test.
Santos, Bruna Oliveira Pinto. "The impacts of the COVID-19 pandemic on the Portuguese economy : a structural break analysis." Master's thesis, 2021. http://hdl.handle.net/10400.14/35303.
Full textA pandemia de COVID-19 poderá causar uma das piores crises de que há memória (Barro et al., 2020). Será a segunda crise que a economia portuguesa enfrenta no século XXI e ainda é incerto se os seus efeitos serão estruturais (permanentes e ligados ao funcionamento do lado da oferta) ou cíclicos (transitórios e ligados a flutuações do ciclo económico e ao lado da procura).Para testar quebras estruturais, é usada uma regressão linear e aplicados o teste de Chow e o teste de Chow para falha preditiva. O modelo usa dados trimestrais de várias fontes, desde o primeiro trimestre de 1998 ao terceiro trimestre de 2020 e é estimado em diferenças sazonais. Considera como variável dependente o produto por trabalhador efetivo e como variáveis explicativas o stock de capital físico por trabalhador efetivo, uma trend temporal e outras variáveis do lado da procura como controlos. Foi aplicado um teste de Chow ao período da Crise Financeira Global de 2008 e uma quebra estrutural foi encontrada no quarto trimestre de 2010. Foi, depois, aplicado um teste de Chow para falha preditiva a uma subamostra do primeiro trimestre de 2011 ao terceiro trimestre de 2020 e a hipótese nula de a pandemia não causar quebra estrutural foi rejeitada. Foram ainda usados testes t para confirmar a origem da quebra. A hipótese nula foi rejeitada para todos os coeficientes da regressão, apontando para a existência de efeitos permanentes no lado da oferta.
Mota, Pedro Nuno Ângelo. "Assessing COVID-19 impact on user opinion towards videogames - Sentiment analysis and structural break detection on steam data." Master's thesis, 2022. http://hdl.handle.net/10362/134292.
Full textAs we live in a world where the videogame industry grows day by day and new media is constantly emerging, user feedback can be widely found online. User reviews are a highly valuable data source when studying player perception of a videogame. They are also apparently volatile to updates released by developers and other external events, which may change user opinion over time. Here we assess whether the COVID-19 pandemic outbreak fell in this category, having or not a noticeable impact on the player view and popularity of videogames. In this research, we build and implement a method to collect active player data and user reviews, identifying the sentiment contained in the expressed opinions. Furthermore, we investigate the existence of structural breaks in the time series we target. For this purpose, we targeted user-reviews and active player data collected of Steam’s twenty most popular Massive Multiplayer Online Role- Playing Games. To collect sentiment polarity values, two Natural Language Processing Python libraries were used, TextBlob and VADER, and structural break detection was put into practice using strucchange R package. The results of this work show us that despite having a great effect on the number of active players, the COVID-19 pandemic did not produce the same impact on Steam user reviews. Nonetheless, we were able to identify one of the platform’s major reviewing related updates as a structural break. We believe this approach can be used for further assessments on public opinion towards a specific product, in the future.
Berisha, Jetëmira. "Estimating the determinants of FDI in Transition economies: comparative analysis of the Republic of Kosovo." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-305681.
Full textZghal, Mohamed Chokri. "The relationship between bread physical texture and its structure determined by digital image analysis." 1999. http://hdl.handle.net/1993/1791.
Full textShum, Adrienne. "Examining the bubble structure and antioxidant activity of pea fibre-enriched bread using image and texture analysis, ultrasound analysis, and antioxidant assays." 2012. http://hdl.handle.net/1993/5028.
Full textFrancis, Zharina. "A study of trends of consumer credit with a focus on the increase in unsecured lending in South Africa." Diss., 2016. http://hdl.handle.net/10500/24839.
Full textBusiness Management
M. Com. (Financial Management)