نتایج جستجو برای: genetic algorithmauto regressive distributed lag total factors productivity agriculture iran

تعداد نتایج: 2679016  

2014
Natalya Ketenci

The effect of the global financial crisis on the international trade patterns of developed countries has been one of the main focuses of recent studies. However, the dependence level of world trade on emerging markets increases every day. Therefore, it is important to study the level of the negative effect of the crisis on emerging economies and the level of their recovery potential. This paper...

ژورنال: انرژی ایران 2022

The present study, in addition to investigating the impacts of GDP and gasoil consumption as the biggest consumed petroleum product in Iranian transportation sector, by introducing petroleum product intensity, studied their effects on CO2 emission in this sector.  To evaluate the impact of the variables, we estimated an autoregressive distributed lag (ARDL) model between the years 1996 and 201...

Journal: :international economics studies 0
saeed rasekhi zahra mojdeh zahra mojdeh

â â â  â â â â â â  â  abstract â  based on the recent literature of heterogeneous firms, productive firms self select themselves into foreign markets. in this framework, there is a productivity rise prior to exporting. on the other words, different export performance across firms is linked to their heterogeneity. â  the main purpose of the present paper is to examine the so-called hypothesis o...

2012
Milad Manafi

During the past few decades there has been a steady increase in global production of poultry meat and eggs. Although the high nutritive value of eggs and poultry meat has resulted in increasing demand, food quality and safety factors are becoming increasingly significant in determining market value of poultry products. Poultry production is one of the fastest growing sectors of Iranian agricult...

Journal: :مدیریت خاک و تولید پایدار 0
حیدر غفاری دانشگاه تهران منوچهر گرجی دانشگاه تهران

maintaining soil productivity is one of the key factors in sustainable agriculture. soil erosion reduces soil productivity over a long-term period of time. therefore, determining soil erosion tolerance is necessary for sustainable agriculture production. in this study, the long-term effects of erosion on soil productivity in the typical kohin watershed were evaluated. the soil productivity inde...

1991
Jeffrey H

Technical progress in U.S. agriculture is evaluated using a new measure of productivity growth, flexible technical change. This measure allows for nonconstant returns to scale, market structures other than perfect competition, and time-varying coefficients. An integral part of the procedure is the estimation of the production function by Flexible Least Squares. Flexible technical change results...

This study was conducted to investigate the genetic diversity of bread wheat, durum wheat and triticale using agronomic and physiological traits. Genetic diversity of 24 genotypes was evaluated in 2 locations (Research Farm of College of Agriculture, Isfahan University of Technology, located at Lavark, Najaf-Abad and Asheghabad farm), Isfahan, Iran, using a randomized complete block design with...

2005
Peter M. Rosset

Industry and mainstream research and policy institutions often suggest that transgenic crop varieties can raise the productivity of poor third world farmers, feed the hungry, and reduce poverty. These claims are critically evaluated by examining global-hunger data, the constraints that affect the productivity of small farmers in the third world, and the factors that explain their poverty. No si...

Journal: :GSC Advanced Research and Reviews 2023

This study analyzed government expenditure and economic growth of Nigeria for the period 1981-2021. Government was proxied with on education, health, social community services while total investment net foreign trade were included as intervening variables. Economic gross domestic product. The data using econometric procedures particularly Auto regressive Distributed Lag (ARDL) model. results sh...

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