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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of System Management
- نوع مقاله: Journal Article
- کلمات کلیدی: Innovation management,System dynamic,Technology Innovation,Downstream Petrochemical Industries
- چکیده:
- چکیده انگلیسی: Special attention to the relative advantages of the economy is the best way toward economic development in every country. Owing to its considerable natural oil and gas resources, Iran has a high potential for the development of these industries. In the value chain process of these God-given resources, a wide diversity of final downstream petrochemical products has a significant charm and scope for technological innovation and development. In the absence of a systematic perspective, all the planning and costs in this field will fail. Therefore, the purpose of this study is to design and analyze the dynamic model of technological innovation management in petrochemical downstream industries in Iran. A questionnaire was designed by analyzing the research literature and the opinions of the experts; then, the factors were investigated using verification factor analysis and structural equations with Smart PLS; the final 26 indicators were categorized in four domains including firm, industry, national, and international. Next, using system thinking and Vensim PLE 6.4, the technology innovation management structure was designed in the downstream industries. The behavior of key variables was also predicted for a 7-year time horizon. Finally, it was used to formulate the technology innovation management scenario.
- انتشار مقاله: 25-12-1397
- نویسندگان: Hamid Doulabi,Abbas Khamseh,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Energy Management and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: strategy,R&D,R&D strategy,Power Plant Equipment's Manufacturing Industries
- چکیده:
- چکیده انگلیسی: Application of advanced technologies in the production process has continuously made power plant equipment's manufacturing industries to move beyond the borders of knowledge and technology. What expedites this movement is R&D which involves organizational resources and aligning with goals and strategies. Proper selection of R&D projects requires an appropriate strategy in line with the business goals of companies operating in this sector. To identify factors affecting R&D strategy formulation, we reviewed existing literature. Then a questionnaire was made using perceptions of 18 academic experts working in R&D departments. The questionnaire was confirmed in terms of validity and reliability and then distributed among experts of 10 companies active in R&D. Findings from structural equation modeling in Smart PLS software revealed that 23 established indicators affect R&D strategy formulation. The indicators were lied and prioritized in six main drivers including business strategy, technology strategy, R&D collaboration strategy, R&D funding strategy, innovation strategy, and R&D supportive strategy, respectively. The results show all the extracted factors have a significant impact on the formulation of R&D strategy. Policymakers should consider each of the great six factors when formulating R&D strategy.
- انتشار مقاله: 19-01-1399
- نویسندگان: Ali Noemani Seighalan,Abbas Khamseh,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Astronomy and Astrophysics
- نوع مقاله: Journal Article
- کلمات کلیدی: Stars: AGB,RSG,RGB,galaxies: Irregular,dwarf
- چکیده:
- چکیده انگلیسی: We have conducted an optical monitoring survey of IC 10 dwarf irregular galaxy in the Local Group, using the Isaac Newton Telescope (INT) with the wide-field camera (WFC), to identify the Asymptotic Giant Branch stars (AGBs). AGBs are at the final stage of their evolution and can be implemented as powerful tools for finding the star formation history and chemical evolution of galaxies. The stellar populations in IC 10 had not been previously identified in optical wavebands surveys. Our data set was obtained in the i- and V-band with the WFC instrument. Photometry was obtained for 48578 stars within the area of 0.07 deg^2 (13.5 kpc^2), of which 10800 stars are detected as AGBs. Radial distribution histogram has been constructed in the image plane for populations of AGBs, RGBs (Red Giant Branch stars) and massive stars. We found that the RGBs population has the largest effective radius among the three populations in the IC 10 image plane. Our data were matched to optical catalogues of Pan-STARRS (The Pan-STARRS release 1 (PS1) survey-DR1) catalogue, mid-infrared catalogue of good sources (DUSTiNGS Good Source Catalog (GSC)) from the Spitzer Space Telescope and near-IR catalogue of Hubble Space Telescope (HST). The number of 441 and 1927 were identified as C-type (carbon-rich) and M-type (oxygen-rich) stars respectively; using the matched stars between our catalogue and the HST catalogue.
- انتشار مقاله: 20-08-1398
- نویسندگان: Mahtab Gholami,Mohammad Taghi Mirtorabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Economic Review
- نوع مقاله: Journal Article
- کلمات کلیدی: Bootstrapping,Human Capital,F21,Keywords: Foreign Direct Investment (FDI),Seemingly Unrelated Equation System,OIC Countries. JEL Classification: C21,F2
- چکیده:
- چکیده انگلیسی: T his study evaluates the causality relationship between human capital and foreign direct investment inflow in twenty-six OIC (the Organization of Islamic Cooperation) countries over the period 1970–2014. We employed the panel Granger non-causality testing approach of Kònya (2006) that is based on seemingly unrelated regression (SUR) systems, and Wald tests with country specific bootstrap critical values. The approach allows one to test for Granger non-causality on each member of panel, separately by taking into account the cross-sectional dependency and slope heterogeneity among countries investigated simultaneously. We found that the hypothesis of Granger non-causality from human capital to foreign direct investment (FDI) was rejected for more than half of the sample countries, mainly among African states. In addition, the effect magnitude of human capital on FDI varies among the states significantly.
- انتشار مقاله: 06-02-1396
- نویسندگان: Pegah Sadeghi,Hamid Shahrestani,Kambiz Hojhabr Kiani,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: size,P/E ratio,Price Bubble,information transparency,liquidity speed
- چکیده:
- چکیده انگلیسی: Financial markets especially the capital market are among the most important means of equipping and allocating financial sources. The stock exchange market is one of the elements of this market. Considering the financial and economic strategic importance of this market, in case there is extensive disruption and deviation in it, it will be seriously problematic to equip and allocate the financial sources of the country. One of the factors causing these issues is the price bubble. Considering the importance of price bubble and following the financial crises caused by the formation of a bubble, the main aim of this study was to investigate the factors affecting the price bubble in the Tehran stock exchange (TSE) market. The statistical sample of this study consists of 166 companies listed in the Tehran stock exchange (TSE) market from 2007 to 2017. In this study, the effective factors and fitting of the main model have been studied using spss software and EViews. The obtained results indicate that based on the fitting of the model, except for variables of size and transparency of information which have not shown a significant effect on the price bubble, other variables including stockholder composition, P/E ratio and liquidity speed have a significant effect on the price bubble.
- انتشار مقاله: 02-02-1399
- نویسندگان: Sara Dastani Heriss,Taghi Torabi,Ali Asghar Anvary Rostamy,Farhad Ghaffari
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Speed of Price Adjustment,Excess Return,Over Reaction,Under Reaction
- چکیده:
- چکیده انگلیسی: In Recent Decades, The Financial Sphere has entered a New Era of Contempt for Some of the Assumptions of Modern Economics and Finance. One of These Assumptions is the Rationale of the Investors, which has been Seriously Challenged and Is Now Being Strengthened by the Fact That Prices are Determined more by Attitudes and Psychological Factors than for Fundamental Variables and Therefore the Study of Market Psychology has Become More Important.
The Purpose of This Research is to assess the Reaction of Investors to Price Changes by Measuring the Speed of Price Adjustment Compared to the General Information in Tehran Stock Exchange and a Model for Yielding Additional Returns in Futures. The five-year Research Period is from 2011 to 2016. The Statistical Population of the Study is the Companies listed in Tehran Stock Exchange and the Results Show that the Rate of Adjustment of Prices is Different from Each other Based on Specific Company Variables, and the Difference in the Rate of Price Adjustment can Cause Make Extra Returns.- انتشار مقاله: 18-04-1397
- نویسندگان: Mostafa Bakhtiari,Hashem Nikoomaram,Fereydon Rahnamay Roodposhti,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Corporate Governance,Tax Justice,Corporate Governance Criteria
- چکیده:
- چکیده انگلیسی: The purpose of this study is to examine the role of corporate governance in the concept of tax justice. The current research contributes to the field of applied research and is regarded as a descriptive survey research, testing four main hypotheses and eight special hypotheses. The required data for this research were obtained through a questionnaire distributed among financial managers of 133 companies listed in Tehran Stock Exchange.
The results of the study were obtained using structural equation modeling and SmartPls software. It was determined that all corporate governance variables have a positive and significant relationship with tax justice; however, no significant relationship was found between tax justice and shareholders' equity measure. It is suggested that companies implement corporate governance principles firmly. In addition, companies can help the government create tax justice by respecting the rights of all stakeholders through corporate governance.- انتشار مقاله: 23-01-1397
- نویسندگان: Abbas Allahyari,Zahra Pourzamani,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Performance Evaluation,Market timing,Mutual Funds
- چکیده:
- چکیده انگلیسی: Appropriate function of active management in common investment funds function depend on factors such as diversification, identification papers unrealistic pricing, market timing, and so on. Market timing are include changing the portfolio investment funds and market indices such as short-term bonds and make an asset depends on whether the market is expected in the whole of the assets to make better or worse. In this study, with using Henriksson and Merton (2008) methodology to assess the market timing function of investment funds in Iran. Based on the above methodology, beta of the portfolio takes only two values. If it is expected that the market will perform well will have a beta greater value and otherwise takes a smaller value. For this purpose, a common investment fund's monthly returns of 53 Mutual Funds were studied. The results of this study suggest that the beta of Mutual Funds was about 0.49 units higher when there waiting for the proper performance of the market than the beta of the funds in normal conditions and the amount of C in the regression equation used Henriksson and Merton significantly is positive. In other words, the existence market timing in investment funds of Iran on a monthly basis is confirmed
- انتشار مقاله: 15-11-1394
- نویسندگان: Taghi Torabi,Samaneh Tarighi,Peyman Tataei
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Stock Returns,Optimal Portfolio,Macro indexes,time-varying parameter method,dynamic models
- چکیده:
- چکیده انگلیسی: In this study, 3 models of Time-Varying Parameters (TVP), Dynamic Model Selection (DMS) and Dynamic Model Averaging (DMA) and a comparison with the Ordinary Least Squares (OLS) method in MATLAB in the time period 2003-2013 (with data on a monthly basis) are discussed. In the present study, the variables of unofficial exchange rate changes, interest rate changes and inflation in oil price forecast returns for stocks in Tehran Stock Exchange are used. The study concludes that dynamic models with time-varying parameters are more accurate in predicting returns in the Stock Exchange, in a way that the MAFE and MSFE models, DMA, DMS which have complete dynamics are more efficient than other models. As a consequence, it can be said that the variability of the coefficients of the variables in the TVP model cannot lead to higher accuracy in predicting returns in the Stock Exchange, and it is required that the dynamics of time-varying variables of the model used to predict stock returns be taken into consideration
- انتشار مقاله: 28-11-1394
- نویسندگان: Hosein Maghsoud,Fraydoon Rahnamay Roodposhti,Hamidreza Vakilifard,Taghi Torabi
- مشاهده