نتایج جستجو برای: empirical method

تعداد نتایج: 1801820  

2015
Deepankar Basu

This paper surveys some of the quantitative empirical research in two areas of Marxist political economy: (a) Marxist national accounts, and (b) Marxist responses to the Sraffa-based critique of the 1970s. With respect to the first area, this paper explains the basic methodology underlying the construction of Marxist national accounts from traditional input-output data. With respect to the seco...

2013
David Austen-Smith Jordi Blanes i Vidal Charles Cameron David Primo David Lewis Brian Roberts Tim Werner John M. de Figueiredo Brian Kelleher Richter

This essay identifies the empirical facts about lobbying which are generally agreed upon in the literature. It then discusses challenges to empirical research in lobbying and provides examples of empirical methods that can be employed to overcome these challenges—with an emphasis on statistical measurement, identification, and casual inference. The essay then discusses the advantages, disadvant...

Journal: :computational methods in civil engineering 2013
i. shooshpasha h. mola-abasi a. jamalian ü. dikmen m. salahi

shear wave velocity is a basic engineering tool required to define dynamic properties of soils. in many instances it may be preferable to determine vs indirectly by common in-situ tests, such as the standard penetration test. many empirical correlations based on the standard penetration test are broadly classified as regression techniques. however, no rigorous procedure has been published for c...

Journal: :پژوهش آب در کشاورزی 0
مجید حیدری زاده استادیار پژوهشکده حفاظت خاک و آبخیزداری. حمیدرضا سالمی استادیار مرکز تحقیقات کشاورزی و منابع طبیعی اصفهان.

estimation of seepage from water channels are necessary in evaluating water productivity in agricultural sector as affected by floodwater spreading on plains and artificial recharge of groundwater. several empirical seepage equations have been developed for this purpose. previous research results in iran have shown lots of variation in the coefficients and the empirical equations change in diff...

Journal: :مرتع و آبخیزداری 0
علی شهبازی دانشجوی دکتری آبخیزداری، دانشکدة منابع طبیعی، دانشگاه تهران، ایران شهرام خلیقی سیگارودی استادیار دانشکدة منابع طبیعی، دانشگاه تهران، ایران آرش ملکیان استادیار دانشکدة منابع طبیعی، دانشگاه تهران، ایران علی سلاجقه استاد دانشکدة منابع طبیعی، دانشگاه تهران، ایران

in order to decrease the risks associated with the management of urban watersheds, the use of proper methods is an essential task to estimate the runoff with a high degree of confidence. time of concentration is one of factors that impacts on peak discharge and runoff volume. the objective of this study is to select the best method among the empirical formulas for estimating the time of concent...

A number of nonparametric methods exist when studying the population and its parameters in the situation when the distribution is unknown. Some of them such as "resampling bootstrap method" are based on resampling from an initial sample. In this article empirical likelihood approach is introduced as a nonparametric method for more efficient use of auxiliary information to construct...

Asghar Mohammadi Ayat Rohina, Ayob Baharani fard Kazem Abadi Nader Kazemi

Several empirical methods for flood flow rate estimation have been presented. In this study,eight new empirical runoff estimation method including Dredge & Burge, Bourges, Inglis, Faning, Hyderabad, Burkli Ziegler, Cramar and Possenti were calculated in Bakhtegan watershed which is located in Fars province. After studying empirical methods for annual flood flow rate estimation and comparing the...

Asghar Mohammadi Ayat Rohina, Ayob Baharani fard Kazem Abadi Nader Kazemi

Several empirical methods for flood flow rate estimation have been presented. In this study,eight new empirical runoff estimation method including Dredge & Burge, Bourges, Inglis, Faning, Hyderabad, Burkli Ziegler, Cramar and Possenti were calculated in Bakhtegan watershed which is located in Fars province. After studying empirical methods for annual flood flow rate estimation and comparing the...

Journal: :Journal of Political Economy 1901

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