نتایج جستجو برای: herfindahl concentration index
تعداد نتایج: 760233 فیلتر نتایج به سال:
Iran`s pharmaceutical products market as one of the major markets of the country has been faced with fluctuations over time. Suitable market selection is necessary for stability of pharmaceutical exports. Study of the global market structure of this product leads to policy makers in development, production, and trade of pharmaceuticals and finally increases country’s share of the world pharmace...
BACKGROUND Although concentrating adult congenital heart disease services at high-volume centers has been widely advocated, the potential beneficial effects of competition and patient choice have received relatively little attention. We aimed to assess the degree of patient choice and competition between adult congenital heart disease units and to investigate whether competition indices correla...
gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...
Research background: Azerbaijan, as a country with rich mineral resources, faces macroeconomic difficulties due to income instability. In 2011-2013, during the period of high world oil prices, Azerbaijan began diversify economy and develop non-oil sector at expense gas export revenues. The need has become especially important in conditions increased global competition integration national into ...
background: about 80% of deaths in 350 million cases of diabetes in the world occur in low and middle income countries. the aim of this study was to determine the status of diabetes socioeconomic inequality and the share of determinants of inequalities in kurdistan province, west of iran, using two surveys in 2005 and 2009. methods: data were collected from non-communicable disease surveillan...
In this paper we investigate the factors contributing to the fall in the Lerner Index (price-cost margin) in the British electricity market during the 90s. A first stage of our analysis models the number of breaks in the Lerner Index and their dating as unknowns. Our results suggest the existence of one structural break in the time series of the Lerner Index. The break point interval includes t...
OBJECTIVES We investigate how much state-to-state elderly migration patterns have changed during 1970-2000 and compare the findings from 2 commonly used sources of data, the census flow tabulations and the integrated public use microdata series (IPUMS). METHODS We calculate descriptive statistics such as migration rates, the distribution of top destination and origin states, and a new migrati...
Can more vigorous political competition significantly raise rural land values, or contribute to more robust land rental markets? Exploiting exogenous variation in the national popularity of Pakistan’s political parties during the 2008 elections, we show that provincial assembly constituencies with greater competition between political parties had significantly higher land values and more active...
AIM To characterize the patterns of competition for a sample of drugs in the Portuguese pharmaceutical market before (January 2002-March 2003) and after (April 2003-June 2003) the introduction of the reference pricing system (RPS). METHODS We performed a descriptive, retrospective, longitudinal analysis, with monthly observations from January 2002 until June 2003 of 15 homogeneous groups. The...
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