-
Open Access Article
1 - Evaluating the environmental and economic impacts of Carbon Tax Using Computable General Equilibrium Model (CGE)
جمشید پژویان حسن معین نعمتیThis paper deals with environmental, welfare and employment effects of Carbon Tax. Carbon tax as a policy instrument, internalizes the external cost of air pollution in price of fuel. The very objective of carbon tax is not only to reduce fuel consumption and hence redu MoreThis paper deals with environmental, welfare and employment effects of Carbon Tax. Carbon tax as a policy instrument, internalizes the external cost of air pollution in price of fuel. The very objective of carbon tax is not only to reduce fuel consumption and hence reduce harmful emissions made by economic agents, but also to lessen the tax burden on wage earners and reduce labor cost which in turn provides incentives for job creation. This study uses Computable General Equilibrium Model which is revenue neutral, i.e. total tax income is taken constant in the model. The model is a non- linear equation system. GAMS as a Software along with input – output table pertaining to Iranian economy is used to solve the mode. The model was calibrated to base year 1378[1]. The findings in this study indicate that the use Carbon Tax as a policy instrument to alleviate the Burdon of tax on labor income, would improve qualitavely the environmental standards and reduce the environmental concerns besides to positive impact on employment and welfare gains. Manuscript profile -
Open Access Article
2 - The effects of information and communication technology (ICT) on the employment in industrial factories of Khorasan Province
کامبیز هژبرکیانی محمد حیدریIn this paper, the effects of Information and Communication Technology (ICT) on employment in different specialized category ranging from total labour force, plain work force, skilled work force, engineer work force, technician work force have been investigated. MoreIn this paper, the effects of Information and Communication Technology (ICT) on employment in different specialized category ranging from total labour force, plain work force, skilled work force, engineer work force, technician work force have been investigated. Independent variables include the index presentating information the index of obtaining information, the number of Internet and computer users, value added, the price of capital, wage and dependent variable is employed labour force . The study period 1385-1389 used for estimation and analysis of the results of the data panel data method. The results of the study are as follows: all technology indicators have positive effect and meaningful on employment: upon of total work force, that is, the effect produced as a result of the predominance of expressing productive effect to process effect. In the case of work force and skilled work force and a simple negative effect between technology and employment indicators confirm the expressing inability to use different specialized category of technological indicators. The index showed a significant positive effect on information and communication technology employment of technicians and engineers in the labor force in the province, and the positive effect of these hypothesis indicators on employment has been approved. Manuscript profile -
Open Access Article
3 - Estimated the potential added value in major economic sectors of Iran with Kalman filter
کامبیز هژبر کیانی محمد نقیبیThe role and the knowledge of measures of Potential Output in policy analysis are of significant importance in Macroeconomics. The aim of this paper is to use the production function approach in order to measure Potential Output through state-space Model, Kalman filter MoreThe role and the knowledge of measures of Potential Output in policy analysis are of significant importance in Macroeconomics. The aim of this paper is to use the production function approach in order to measure Potential Output through state-space Model, Kalman filter method. To achieve this goal, we have estimated the value added output of mining, construction, oil and gas, agriculture, water and electricity, and service industries during 1339 – 1389in Iran. Manuscript profile -
Open Access Article
4 - Evaluation of production functions to estimate rapeseed yield in different Interval times
Arash Tafteh اصلان اگدرنژاد Niazali ebrahimipakIn this research evaluated production functions has been modified by Rase, 2004 And Tafteh et al.2013, this methods evaluated to estimate rapeseed yield under deficit irrigations with in the monthly intervals, quadruple growth stages and total growth period in the Qazvi MoreIn this research evaluated production functions has been modified by Rase, 2004 And Tafteh et al.2013, this methods evaluated to estimate rapeseed yield under deficit irrigations with in the monthly intervals, quadruple growth stages and total growth period in the Qazvin plain. For this purpose, randomized complete block design was applied. The irrigation treatments (60-90-120-150 mm evaporation from pan class A) with three replications were used during 2010 - 2012. The results showed that Treatments T11 and T12 with 2390 and 1320 yield (kg/ha) respectively have a maximum and minimum yield. Also results show that the best estimation was occurred in the total growth stage and other intervals were decreased the accuracy of the models. So the minimum error was in the total growth stage in the both methods. Statistical analysis shown that Tafteh et al. (2013) method in the total growth stage has the lowest root mean squared error (RMSE) and Normalized root mean squared error (NRMSE) respectively equal to 423 and 0.211. Also this method has a maximum of agreement index (d) and correlation coefficient (R2) Respectively equal to 0.76 and 0.645. Therefore Tafteh et al. (2013) method is suitable way for estimation of rapeseed yield in deficit irrigations. Manuscript profile -
Open Access Article
5 - Estimation of Yield Response Factor to Water Stress in Garlic Plant under Deficit Irrigation
Arash Tafteh Fatemeh Keykhaei Mojtaba HadizadehBackground and Aim: Due to the importance of determining the behavior of plants in water shortage conditions, it is necessary to determine the coefficients of plant sensitivity to water at different stages of plant growth. Water shortage in the Sistan plain is a serious MoreBackground and Aim: Due to the importance of determining the behavior of plants in water shortage conditions, it is necessary to determine the coefficients of plant sensitivity to water at different stages of plant growth. Water shortage in the Sistan plain is a serious and important issue, so that the lack of water supply to the Helmand border river, which is the only source of water supply in the region, leads to the destruction of agriculture. The low possibility of increasing new water resources and the need to increase agricultural production from limited water resources in this region requires the use of appropriate scientific and technical methods to increase the productivity of agricultural water consumption. Also, changing the pattern of cultivation and replacement of high-income crops in recent years in arid areas has received much attention from farmers. The purpose of this study is to investigate the effects of water stress on the behavior of garlic in dehydrated conditions to calibrate the production function of this plant to obtain yield response coefficients in conditions of water shortage.Method: In this study, garlic plant was implemented in the form of a randomized complete block design with three replications in 1398 and 1399 in Sistan and Baluchistan province. Treatments were applied based on stress levels compared to control 30, 35, 40, 45, 50, 60 and 70% of water requirement. This station is located 20 km southeast of Zabol city at latitude 61 degrees and 41 minutes and latitude 30 degrees and 54 minutes in Sistan region. The altitude of the station is 483 meters above sea level, the average annual rainfall is 55 mm and the annual evaporation rate is 4500 to 5000 mm. This region has a very dry climate with very hot summers and mild winters. The area of the experimental plot was equal to 750 square meters was selected for planting garlic of Chinese cultivar before planting the bed was reinforced with animal manure and after growing based on soil fertilizer test, 300 kg of potassium phosphate, 200 kg of triple phosphate and 100 kg. One kilogram of urea was added to the soil. Then plow and disc and finally leveled. On the 24th of October, grooves were planted with a shovel at a distance of 20 cm and a depth of 5 cm to plant garlic of Chinese cultivar, and garlic tubers were planted at a distance of 8 cm on the rows. Then, based on the obtained information, the two functions of Tafteh and Raes production were investigated and yield response factors were determined during the growing period.Results: Comparing the two methods used the highest yield of garlic in the study was 8240 kg / ha, for the production of which 833 mm of water was used. The data of the first year were used to calibrate the yield response factors of garlic and after calibrating the two production functions of Raes and Tafteh, the values of the yield response factors of garlic were presented. This coefficient was different in the range of 0.5 to 1.2 in different periods of garlic plant growth, the change curve was presented. Evaluation of Rice method in the second year with root mean square error of 1302 kg / ha and normalized value was about 23%.Conclusion: In the method of Tafteh the mean root mean square error was 485 kg / ha and the normalized value was about 11%. Therefore, the method of Tafteh is recommended in determining the yield of garlic under water stress conditions. Manuscript profile -
Open Access Article
6 - Investigating Irrigation Management in Different Stages of Growth on the Yield and Yield Components of Lentils under Different Levels of Iron Nano-Chelate in Deylaman Region
Sayyed Mostafah Sadeghi Ali Abdzad GohariBackground and Aim: The increase in water consumption in agriculture has caused irrigation management to be studied by experts and researchers in recent years. Water is one of the most important factors limiting the production of lentils. Increasing water productivity t MoreBackground and Aim: The increase in water consumption in agriculture has caused irrigation management to be studied by experts and researchers in recent years. Water is one of the most important factors limiting the production of lentils. Increasing water productivity through the application of deficit irrigation methods is one of the important topics in the production of this crop. One of the important needs in agricultural planning is to identify the plant's nutritional needs. Iron is one of the essential elements of low consumption and low mobility that plants need the most among micronutrients. Therefore, the present study was conducted with the aim of investigating the irrigation management and iron nano-chelate on the yield and yield components of lentils in Guilan province.Method: The present experiment is conducted as a split-plot in the form of a randomized complete block design in three iterations in the Deylaman region. The main factor includes four levels namely without irrigation (rainfed), irrigation in the flowering stage, irrigation in the pod formation stage, and irrigation in the flowering and pod formation stage (full) and the sub-factor includes fertilizing nano iron chelate solution during flowering, pod formation time, flowering and podding time and, pre-ripening.Results: The findings of the research demonstrate that the effect of irrigation management and the influence of nano-chelate on grain and biological yields are significant at the level of 1 percent. As a result of irrigation management, the highest grain and biological yields are observed in the flowering and podding stages under irrigation conditions with an average of 1457 and 4380 kg.ha-1, respectively. At different levels of iron nano-chelate fertilizer, in the flowering and podding stage and fertilization in the pre-ripening stage, the highest grain yield is with an average of 834.2 and 861.7 kg.ha-1, respectively, and the maximum biological yield with an average of 3317.4 and 3228.6 kg.ha-1, respectively.Conclusion: With full irrigation, the number of main branches, the number of full pods per plant, and the biological and grain yields increases, and spraying solution of iron nano chelate fertilizer improves the number of nodes in the stem, and the number of full pods in the plant and rises the biological yield. Therefore, full irrigation and use of iron nano chelate fertilizer during the flowering and podding stages are recommended for the local lentil plant in the study area. Manuscript profile -
Open Access Article
7 - Optimization of water use efficiency and yield in potato using marginal analysis theory
Parviz fathi Mohammad soltaniWater scarcity is a widespread problem in arid and semi arid regions. In this condition, evaluating crop response to water stress and estimation of ET production function (ETPF) is essential. The objective of this study was to investigate the dynamic interrela MoreWater scarcity is a widespread problem in arid and semi arid regions. In this condition, evaluating crop response to water stress and estimation of ET production function (ETPF) is essential. The objective of this study was to investigate the dynamic interrelations of yield, evapotranspiration and water use efficiency of potato (Solanum Tuberosom L.) under trickle irrigation condition. This study was conducted in Dehgolan region of Kurdistan province in spring season of 1388. The experiment was arranged based on completely randomized block with 3 replication of water supply (60%, 80%, 100%, 120% of crop water requierment). In this study, evapotranspiration values and total yield of treatments were measured. To reveal the interrelations of yield, evapotranspiration and water use efficiency, two types of water production function including: Linear and Quadratic were used. The results showed that when the ETPF is linear, the EI will be numerically equal to the yield response factor (Ky), when ET reaches maximum ET (ETm). When ETPF was quadratic, the ET needed to maximize WUE is less than the ET for maximum yield (Ym). The results were also revealed that maximum yield was achieved at 345 mm of evapotranspiration and maximum water use efficiency (26.6 kg/m3) was achieved at 222 mm of evapotranspiration where 55.4 percent was less than the maximum evapotranspiration (ETm). However, the maximum yield was only 27.7 percent more than the yield in maximum water use efficiency. The interrelation of Y, ET and WUE are demonstrated that if water supply is limiting, seeking maximum water use efficiency may be desirable. Manuscript profile -
Open Access Article
8 - Evaluation of Environmental Efficiency and Shadow Price of Pollutants Determination in Khuzestan Province Meat Livestock
Habib Shahbazi Zahra GheitasiBackground and Objective: The growing environmental problem and then Added cost which create diverse environmental activities, led scientists to modify their efficiency and productivity models with well-liked products and undesirable products effects. Emissions of green MoreBackground and Objective: The growing environmental problem and then Added cost which create diverse environmental activities, led scientists to modify their efficiency and productivity models with well-liked products and undesirable products effects. Emissions of greenhouse gases from various sources, especially from agriculture sector, are one of the main causes of environmental pollution.Material and Methodology: The purpose of this study was to evaluate the environmental effecuency and determination of the shadow price of pollutants for meat dairy in Khuzestan province. In this study, 60 samples and a random fronteier production function model have been used by frontier functions using the maximum likelihood method and the FRONTIER econometric software.Findings: Results indicate that the technical efficiency of the meat livestock units of the province is 0.99 which could indicate that meat livestock units have relatively high technical efficiency. Also, the results of environmental efficiency of Khuzestan province meat livestock units have shown that the average environmental efficiency is 0.29. In fact, this level of environmental efficiency shows that meat livestock units in Khuzestan province have relatively low environmental performance.Discussion and Conclusion: In order to prevent inaccurate decisions in the field of management and development of economic activities without concern for environmental issues, planner, policymaker and investors, in addition of technical effciency, should use enviromental efficency as developing criteria of their acivites. Manuscript profile -
Open Access Article
9 - Ecotourism Valuation Rural Tourism Target of Malhamdare Village in Asadabad County of Hamedan Province
Habib ShahbaziEconomic valuation of environmental resources is allocated the great part of environmental economic studies. Environmental economist believed that economic valuation is necessary for environmental and services of non-market resources and denying of it will have results MoreEconomic valuation of environmental resources is allocated the great part of environmental economic studies. Environmental economist believed that economic valuation is necessary for environmental and services of non-market resources and denying of it will have results as regret in long run. When environmental functions tied to historical and rural heritage, results of non-valuation will have more prominents. The purpose of this study is determining the recreational value of Malhamdare village services (environmental and historical) in Asadabad County (Hamedan Province). So, for this, individual travel cost method is used in household production function framework for years of 2015. The results show that the time, distance and costs of travel are effective factors on production recreation and recreation marginal cost, with the assumption of competitive conditions, is equivalent to 1397650.2 Rials per days which is shadow price of recreation. Also demand for recreation has negative relationship with the shadow price of recreation and has a positive relationship with income. On the other hand, visitor’s willingness to pay has a significant and positive relationship with quality of the environment, education level, age and marriage status of visitor. So, increasing environmental quality and preparing facilities in Malhamdare village by private sector investing will have increased environmental, recreation and ecotourism value of Malhamdare village. Manuscript profile -
Open Access Article
10 - Effects of the prebiotic Inuline on functional of reproduction, gonad development, fecundity and sex ratio in Danio rerio
مهدیه فدایی احسان احمدی فر طیبه عنایت غلامپورThe use of probiotics and prebiotics for increasing the growth and resistance against disease are well documented in aquaculture but work on the effects of probiotics and prebiotics on the reproductive performance of fish, especially on ornamental fish, are lacking. We MoreThe use of probiotics and prebiotics for increasing the growth and resistance against disease are well documented in aquaculture but work on the effects of probiotics and prebiotics on the reproductive performance of fish, especially on ornamental fish, are lacking. We conducted a study to determine the effects of probiotic on gonad development, reproductive performance of Danio rerio. In this study, a diet based on a control diet (T0) and three experimental diets consisted of three levels of inulin: 1 (T1), 2 (T2) and 3 (T3) and these treatments were done with three replicated. The juveniles were fed experimental diets for eight weeks (until adulthood: average weight: 1.67 gr, average length: 5.4 cm). In this experiment reproductive performance in terms of egg diameter, absolute fecundity, sex ratio, gonadosomatic index, number of larvae, survival of juveniles and gonad development were examined. The results showed that probiotic treatments, reproductive performance including egg diameter, survival larvae, absolute fecundity, Gonadosomatic Index, length and weight of larvae in treatment T2 and T3 were significantly higher than other treatments (P <0.05). Also the results showed that the prebiotic inulin does not have a significant impact on the sex ratio in zebrafish (P> 0.05). According to the histology of the gonads, the use of dietary inulin accelerates the process of gonad development in zebrafish. Manuscript profile -
Open Access Article
11 - Measurement of Economics to Scale in Corporates of Tehran Stock Exchange
Vahid Mahmoudi Mohammad Hossein Ghaemi Hossein Kazemi -
Open Access Article
12 - Evaluating the effect of managerial and economic factors on broiler poultry production in Qom province
Ghasem Gholami sahar dehyouri -
Open Access Article
13 - Electrical Energy Management of Industrial Consumers to Increase Profitability with an Optimal Control Strategy - a case study
Mahmoud Zadehbagheri Mohammadjavad Kiani Ali Asghar Ghanbari -
Open Access Article
14 - The Measurement of Technical Efficiency and Effective Factors in Cucumber Greenhouse (Case Study: Eastern Azarbayjan Province)
B. Abdollahi H. Raheli M. Taghizadeh M. Kasrani B. NajaflouThe purpose of this study was to estimate technical efficiency of cucumber greenhouses in Eastern Azarbayjan. In economic literature, it means the ratio of maximum output to the inputs. The objective of this research was to determinate the effective factors influencing MoreThe purpose of this study was to estimate technical efficiency of cucumber greenhouses in Eastern Azarbayjan. In economic literature, it means the ratio of maximum output to the inputs. The objective of this research was to determinate the effective factors influencing it's inefficiency. The method of determination of deterministic and stochastic technical efficiency is corrected ordinary least squares (COLS) and maximum likelihood (ML) respectively. The average of technical efficiency in province’s cucumber greenhouse is approximately about 57 and 93 percent for deterministic and stochastic frontier method respectively. Production types had positive influence on technical inefficiency whereas experience of manager have negative influence on technical inefficiency. Manuscript profile -
Open Access Article
15 - Measuring and Analysis of Total, Factor Productivity (Case Study: Industrial Sector of Kordestan Province)
Sedige Atrkar roshan Fateme RasouliThe purpose of this research is to measure and analyse the total factor productivity (TFP). The case under study is the industrial sector of Kordestan Province in Iran. In order to achieve this goal, based on the International classification of the commodities, ( ISIC R MoreThe purpose of this research is to measure and analyse the total factor productivity (TFP). The case under study is the industrial sector of Kordestan Province in Iran. In order to achieve this goal, based on the International classification of the commodities, ( ISIC Riv, 2) and applying panel data for the period 2005-2011, the industrial sector is categorized into 23 groups and the productivity is measured. Since the data for the capital stock is not available for the Kordestan Province, it is calculated in this study first. Using various production functions, and selecting the most suitable functions, the elastisities, are then estimated. In the next step, the TFP is measured by applying the Divisia Index, for the period under consideration. The findings of this research show that TFP for the Industrial sector of Kordestan Province has reduced annually by 2 percent on average.However, the TFP in the industrial sector as a whole was 0/06 during the period under study. Manuscript profile -
Open Access Article
16 - Examining Technical Efficiency of Industries and the Position of High-tech Industries in Iran
mehdi rezaei hasan valad beigi parisa yaghobi manzariThe goal of this paper is to estimate technical efficiency of the industries and the position of high-tech industries in Iran. The researchers have tried to estimate technical efficiency of 123 Iranian industries including 10 high-tech manufactures during 2008-2010. To MoreThe goal of this paper is to estimate technical efficiency of the industries and the position of high-tech industries in Iran. The researchers have tried to estimate technical efficiency of 123 Iranian industries including 10 high-tech manufactures during 2008-2010. To get the goal, a stochastic frontier production function has been used. The results represent that the technical efficiency is averagely 0.4 during the years under study. The technical efficiency of 49 industries including 6 out of 10 the high-tech industries have a technical efficiency more than the average. As well as, “manufacture of optical instruments and photographic equipment” and “manufacture of aircraft and spacecraft” have higher technical efficiency than others. Manuscript profile -
Open Access Article
17 - Total Factor Productivity of Khosh Noosh Beverage Company
naserali yadollahzadeh tabari seyedeh zahra khoshabiOne of the most important objectives of all economic Companies is to get maximum returns of available resources and to achieve high level of productivity. This study is done in order to measure the total factor productivity in Sari Khosh Noosh Company during 2003-2009 b MoreOne of the most important objectives of all economic Companies is to get maximum returns of available resources and to achieve high level of productivity. This study is done in order to measure the total factor productivity in Sari Khosh Noosh Company during 2003-2009 by using monthly data and production function. At first, we took the data of capital stock based on exponential trend. Then, different types of functions were estimated, and finally chose Cobb-Douglas production function as the best form. To guarantee avoiding spurious regression, co-integration tests are used. Ultimately, by using Kenderik index, we calculated the total factor productivity and its growth rate. The results explained that, during of this period, the total productivity of the company has decreased. Manuscript profile -
Open Access Article
18 - Comparing Estimations of Return to Scale in Mechanized and Semi-Mechanized Broiler Chick Farms Located in Gorgan City
N. Alazmani A.R. Yazdani A. Darijani -
Open Access Article
19 - Selecting the Cultivation Pattern based on Economic Value of Water in Gotvand Township, Iran
M. A, Sabbagi -
Open Access Article
20 - Examining Subsidy Polices on Maize Production in Iran (Panel Data approach)
Negin Hosseingholizadeh Jafar Haghighat Rassul MohammadrezaeiAmong the agricultural important factors, inputs are the most significant in agricultural production. This article aimed to examine the impact of government subsidy policies on production of one of the most strategic products, namely on production of one of the most str MoreAmong the agricultural important factors, inputs are the most significant in agricultural production. This article aimed to examine the impact of government subsidy policies on production of one of the most strategic products, namely on production of one of the most strategic products, namely maize, in Iran. To achieve this goal, panel data for the nine provinces of Iran's major producers of maize during the period of 1999-2007, is used. In this study, first the country's maize production function has been estimated by using data information for inputs: chemical fertilizer, labor, water, seeds and pesticides. And then, calculating the partial elasticity of production factors,sensitivity of production to changes in the value of inputs is evaluated. Also, using a methodology based on the maximum profit, inputs´ demand function is calculated.Results of analyzing government Subsidy Policy showed that, paying subsidy to chemical fertilizer decreases maize production 0.412 percent, because of low demand elasticity of this input. Also according to subsidy of seed, with regard to low demand elasticity of this input to its price, paying subsidy that decreases seed price, wouldn´t have so high effect on its consumption and consequently, on production growth, so that maize production only increased 0.478 percent due to paying subsidy to seed. Manuscript profile -
Open Access Article
21 - Economic Pricing of Water in Pistachio Production of Sirjan
Nasrin Ohadi Jaleh Kurki NejadGiven the strategic remarkable rank of pistachio in non-oil exports, inputs’ management in its production is so important. As the scarcest input in agricultural sector, water is considered to be among the most important inputs of pistachio production.Water inadequ MoreGiven the strategic remarkable rank of pistachio in non-oil exports, inputs’ management in its production is so important. As the scarcest input in agricultural sector, water is considered to be among the most important inputs of pistachio production.Water inadequate supply and limate conditions increase water demand in pistachio growing areas. It is necessary to determine the real value or price of water for establishing a balance between its demand and supply. Therefore, this study has aimed at estimation of water economic value. The method used in this research is the production function approach. Requested data sets were obtained from the questionnaires was filled out for crop years of 2013-2014. The results show that the average economic value of irrigation water is 50360 RLS but the average price paid by farmers is 1771 RLS per cubic meter of water. Thus, there is a wide gap between water value and the price paid by farmers with which appropriate pricing of water based on its economic value can be eliminated. Manuscript profile -
Open Access Article
22 - تخمین تقاضای آب بخش کشاورزی با استفاده از تابع آب محصول ( مطالعه موردی ، سیستان)
Zahra Ghaffari Moghadamدر این مطالعه با استفاده از تابع آب- عملکرد و تابع سود، تابع تقاضا آب برای بخش کشاورزی در منطقه سیستان بدست آمد. نتایج حاصل از تخمین تابع تولید نشان می­دهد نسبت تبخیر و تعرق واقعی به پتانسیل اثر مثبت و معنی­داری روی نسبت عملکرد واقعی به پتانسیل برای محصول گندم و Moreدر این مطالعه با استفاده از تابع آب- عملکرد و تابع سود، تابع تقاضا آب برای بخش کشاورزی در منطقه سیستان بدست آمد. نتایج حاصل از تخمین تابع تولید نشان می­دهد نسبت تبخیر و تعرق واقعی به پتانسیل اثر مثبت و معنی­داری روی نسبت عملکرد واقعی به پتانسیل برای محصول گندم وجود دارد و با توان دوم نسبت تبخیر و تعرق واقعی به پتانسیل رابطه منفی و معنی­داری دارد. چنانچه این نسبت افزایش یابد نسبت عملکرد کاهش می­یابد. پس از بدست اوردن توابع تولید، با استفاده از تابع سود، تابع تقاضا برای بخش کشاورزی نیز بدست آمد. کشش قیمتی تقاضای آب برای بخش کشاورزی 10/1- برآورد شد کوچکتر بودن مقدار این کشش از منفی یک نشان می­دهد که سیاست­های قیمتی می­توانند عامل مهمی در کنترل مصرف غیر بهینه این نهاده با ارزش باشند. Manuscript profile -
Open Access Article
23 - Joint pricing and production management: a geometric programming approach with consideration of cubic production cost function
Seyed Jafar Sadjadi Aghil Hamidi Hesarsorkh Mehdi Mohammadi Ali Bonyadi Naeini -
Open Access Article
24 - Impact of ICT on Economic Growth in Iran
Shahabeddin Mamoory Fatemeh ZandiVarious research shows different results of the impact of Information and Communication Technology on countries' economic growth. The reason for this is the use of different variables as well as different calculation methods. In this article, we examine the impact of In MoreVarious research shows different results of the impact of Information and Communication Technology on countries' economic growth. The reason for this is the use of different variables as well as different calculation methods. In this article, we examine the impact of Information and Communication Technology on economic growth in Iran between the ages of 1989 and 2019. This research is conducted by Auto Regressive Distributed Lag Model (ARDL) on the production function, which uses ICT investment as an explanatory variable. Unlike most studies based on recent 10 years data, this study examines 30 years data. Estimates of this study show that the impact of Information and Communication Technology on economic growth is positive and significant and nearly 0.12%, but it is insignificant to the impact of Labor Force and Energy Consumption on economic growth. The impact of the Labor Force was 1.17% and Energy Consumption of nearly 1%, and it also found that Capital Stock has a positive and non-significant effect on economic growth in recent years. Manuscript profile -
Open Access Article
25 - Automakers Clustering based on Economic Production Function using Data Envelopment Analysis
S. Rezaei Gh.R. Amin M.Gh. AriyanezhadDEA-based clustering approach reveals the input–output relationships hidden in the data items of input and output. DEA-based clustering approach employs the piece-wise production functions derived from the DEA method to cluster the car companies. Estimate produ MoreDEA-based clustering approach reveals the input–output relationships hidden in the data items of input and output. DEA-based clustering approach employs the piece-wise production functions derived from the DEA method to cluster the car companies. Estimate production function for each car company by input-output data is the benefit of this method. Thus, each car company (like Saipa) not only knows the cluster that it belongs to, but also checks the production function type that it confronts. It is important for managerial decision-making in different fields where decision-makers are interested in knowing the changes required in combining input resources. Manuscript profile -
Open Access Article
26 - THe effect of Globalization on technical efficiency of pharmaceutical products in Iran
Sahar. Shokri Oranus. Parivar Bijan. SafaviAs it seems inevitable for all countries to get involved in world economy.on one hand,expanded needs and necessities,and on the other hand specialized production have caused no country could pace in isolation.The aim of this paper is to evaluate the effect of globalizat MoreAs it seems inevitable for all countries to get involved in world economy.on one hand,expanded needs and necessities,and on the other hand specialized production have caused no country could pace in isolation.The aim of this paper is to evaluate the effect of globalization on technical efficiency of pharmaceutical products in Iran.In order to consider that,Cobb-Douglas and frontier production function with econometrics approach,Corrected ordinary Least Square(COLS),is used.The results reveal that the integration of intemational Trade(ITT) as the globalization has no effect on technical efficiency of pharmaceutical products. Manuscript profile
Sanad
Sanad is a platform for managing Azad University publications
Links
Related Centers
Technical Support
Official pages
The rights to this website are owned by the Raimag Press Management System.
Copyright © 2021-2024