نتایج جستجو برای: toojel classification d24
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این پژوهش به بررسی اثرات اقتصادی نفوذ و گسترش ارتباطات بر عملکرد بهرهوری 19 بخش و کل اقتصاد ایران میپردازد. برای این منظور از جداول داده - ستانده سال 1380 و 1390 مرکز آمار ایران و مرکز پژوهشهای مجلس شورای اسلامی استفاده شده است. در این مورد، مطابق با چارچوب مطالعات پترسون (1979) و کورا (2006)، به بررسی رابطهی بین سرمایهگذاری در زیرساخت ارتباطات و بهرهوری کل عوامل پرداخته شده است. یافتهه...
Place names are often used to describe and to enquire about SPIRIT project D24 3301 Modelling vague places with knowledge from the web IST-2001-35047 v 1.1 Page 2 of 29 geographical information. Geographical place name ontologies, such as gazetteers and geographical thesauri, can help automate geographical information retrieval tasks that employ place names. Most gazetteer resources encoding kn...
Metastatic melanoma is refractory to irradiation and chemotherapy, but amenable to immunological approaches such as immune-checkpoint-inhibiting antibodies or adoptive cell therapies. Oncolytic virus replication is an immunogenic phenomenon, and viruses can be armed with immunostimulatory molecules. Therefore, oncolytic immuno-virotherapy of malignant melanoma is an appealing approach, which wa...
This study examines the impact of participation in short supply chains (SSCs) on technical efficiency (TE) and technological change (TC) cucumber production China, using data for period 2011–2016. The meta-frontier model two-stage residual inclusion approach are utilized to examine association between SSC participation, comparable TE, TC. Accounting selection bias, we show that significantly de...
American industries have grown more concentrated over the last 40 years. In absence of productivity innovation, this should lead to price hikes and output reductions, decreasing consumer welfare. With US census data from 1972 2012, I use disentangle revenue output. Industry-level estimates show that concentration increases are positively correlated real growth, uncorrelated with changes overall...
Using detailed household-level data from Malawi on physical quantities of agricultural outputs and inputs, we measure farm total factor productivity (TFP), controlling for land quality, rain, transitory shocks. We find that operated size capital are essentially unrelated to TFP, implying substantial misallocation. The output gain a reallocation factors their efficient use among existing farmers...
Bootstrap confidence intervals on fixed-effects efficiency estimates from finite-sample panel data models exhibit low coverage probabilities, because the traditional estimate involves a "max" operator that induces a finite sample bias. Attempts to bootstrap confidence intervals for the traditional estimate have focused on correcting bias. Rather than addressing this bias at the bootstrap stage,...
In this work we investigate two crucial dimensions of firms’ structure and dynamics, that is profitability and productivity performance. The empirical distributions and the associated persistence over time are explored through a set of parametric and non parametric exercises performed on an large panel of Italian firms active in both Manufacturing and Services during the period 1998-2003. The m...
We derive new temperature dependent Sellmeier equations for the extra-ordinary and ordinary refractive indices of 0.5% MgO-doped stoichiometric LiTaO3 crystal. The equations are based on quasi phase-matched frequency conversion measurements, as well as on interferometric measurements of the thermal expansion and thermal dispersion. These equations fit experimental data over wide spectral ranges...
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