نتایج جستجو برای: جمعیت f23

تعداد نتایج: 33480  

2000
Dominique Guellec

This paper presents three new patent-based indicators of internationalisation of technology reflecting international cooperation in research and the location of research facilities of multinational firms. They witness both an increasing trend towards the globalisation of technology in the OECD area and large cross-country differences in the extent of internationalisation. An empirical analysis ...

2009
Tomohiko Inui Richard Kneller Toshiyuki Matsuura Danny McGowan Masahisa Fujita David Greenaway Kyoji Fukao Sadao Nagaoka

This paper investigates why multinational ownership is found to increase the probability that a plant will exit. It does so by using Japanese plant data linked to firm data. Plants belonging to a multinational are 9 percentage points more likely to exit when plant, firm and industry characteristics are conditioned on. We find that the “footloose” effect is attributable to multinationals closing...

2015
Yasuo Sanjo

Article history: Received 5 December 2011 Received in revised form 31 August 2012 Accepted 4 September 2012 Available online 11 September 2012 We investigate international joint ventures in an integrated market using a two-country model with asymmetric sizes. We show that although the domestic firm in the small country is less efficient, it is possible that the government of the small country i...

2016
Thorsten Hansen

This paper studies the impact of trade liberalization in terms of tariff cuts within the Eastern European enlargement on German and Austrian firm productivity. Unique matching of data from 1994 to 2003 suggests that tariff reductions raise parent firm productivity significantly. A ten percentage point decrease in tariff rates can lead to total factor productivity gains of up to 2 percent. The d...

2004
Rachel Griffith Rupert Harrison John Van Reenen

This paper examines whether UK firms that locate their R&D activity in the USA benefit more than other UK firms from knowledge spillovers originating from US R&D. Patent data provides a firm-level measure of the location of innovative activity, which enables the identification of knowledge spillovers associated with "technology sourcing". Our identification strategy helps to address various pro...

2010
Ronald B. Davies

This paper uses affiliate level data from Swedish multinationals to examine the impact of tax treaties on both overall affiliate sales and the composition of those sales. In line with previous results, we find little evidence for an effect of treaties on the level of total sales. We do, however, find that a tax treaty increases the probability of investment by a firm in a given country. In addi...

2003
Abigail Tay Gerald Willmann

This paper analyzes the global aspects of competition policy. The effects of a merger in the global marketplace will generally be asymmetric, and consequently lead to a bias in domestic merger decisions. In order to compare different policy regimes, we ascribe general objective functions to the respective authorities and employ a stochastic notion of mergers. We show that under the territoriali...

Journal: :Journal of Entomological Society of Iran 2023

وراثت مقاومت سفیدبالک گلخانه، Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae)، به دو ترکیب ایمیداکلوپرید و کلرپایریفوس مورد مطالعه قرار گرفت. در این پژوهش، از جمعیت فیلستان ورامین (FL) عنوان والد مقاوم فردیس کرج (FR) حساس استفاده شد. مقدار ترتیب حدودا 62/13 91/14 برابر بود. عدم وجود اختلاف معنی‌دار LC50 روی تلاقی‌های F1 (R♂×S♀) Fʹ1 (R♀×S♂) نشان داد که T. نوع اتوزومی (غیرجنسی) است. ه...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1348

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1354

چکیده ندارد.

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