Search results for "efficiency"
showing 10 items of 1430 documents
Echocardiographic reference ranges for normal non-invasive myocardial work indices: results from the EACVI NORRE study
2019
International audience; Aims - To obtain the normal ranges for 2D echocardiographic (2DE) indices of myocardial work (MW) from a large group of healthy volunteers over a wide range of ages and gender. Methods and results - A total of 226 (85 men, mean age: 45 ± 13 years) healthy subjects were enrolled at 22 collaborating institutions of the Normal Reference Ranges for Echocardiography (NORRE) study. Global work index (GWI), global constructive work (GCW), global work waste (GWW), and global work efficiency (GWE) were estimated from left ventricle (LV) pressure-strain loops. Peak LV systolic pressure was non-invasively derived from brachial artery cuff pressure. The lowest values of MW indic…
Effects of Joint Kinetics on Energy Cost during Repeated Vertical Jumping
2019
The present study was designed to investigate the effects of lower limb joint kinetics on energy cost during jumping.Eight male middle and long-distance runners volunteered for the study. The subjects were asked to repeat vertical jumps at a frequency of 2 Hz for 3 min on a force platform in three different surface inclination conditions: Incline (+8°), Level (0°), and Decline (-8°). Sagittal plane kinematics were obtained using a high-speed video camera. Simultaneously, ground reaction forces and EMG of the lower limb muscles were recorded. Energy cost was calculated using steady-state oxygen uptake, respiratory ratio, and vertical distance of the body.In all conditions, energy cost correl…
Determinants of Banks’ Profitability: Evidence from EU 27 Banking Systems
2015
Abstract In this study we assess the main determinants of banks’ profitability in EU27 over the period 2004-2011. We split the factors that influence bank profitability in two large groups: bank-specific (internal) factors and industry specific and macroeconomic (external) factors. We consider as proxy for banks profitability the return on average assets (ROAA) and the return on average equity (ROAE). The empirical findings are consistent with the expected results. Credit and liquidity risk, management efficiency, the diversification of business, the market concentration/competition and the economic growth have influence on bank profitability, both on ROAA and ROAE. An interesting and valua…
Equilibrium mergers in a composite good industry with efficiencies
2014
This paper studies equilibrium merging behavior in composite good industries. Component producers face the option to either merge with a similar component producer (horizontal merger) or a complementary one (complementary merger) of a composite good. Focusing only on strategic reasons, complementary mergers arise at equilibrium only when composite goods are very differentiated while horizontal mergers otherwise. Next, when efficiencies are considered, the level of marginal cost saving required for a horizontal merger in a composite industry to result in a non- increase in the upward price pressure index (UPPI) is greater as compared with the one in a regular industry. This result can be use…
Equilibrium in Asset Prices: Evidence from Cryptocurrencies
2019
Employing daily data on ten cryptocurrencies that exhibit the highest market capitalization, we find one instance of cointegration equilibrium in the 2016 2018 period. Contrary to earlier studies that report cryptocurrency markets are developing toward market efficiency, our findings suggest that even the most liquid cryptocurrency markets are inefficient.
Asset Market Equilibria in Cryptocurrency Markets: Evidence from a Study of Privacy and Non-Privacy Coins
2019
This paper explores whether asset market equilibria in cryptocurrency markets exist. In doing so, it distinguishes between privacy and non-privacy coins. Most recently, privacy coins have attracted increasing attention in the public debate as non-privacy cryptocurrencies, such as Bitcoin, do not satisfy some users’ demands for anonymity. Analyzing ten cryptocurrencies with the highest market capitalization in each sub-market in the 2016–2018 period, we find that privacy coins and non-privacy coins exhibit two distinct market equilibria. Contributing to the current debate on the market efficiency of cryptocurrency markets, our findings provide evidence of market inefficiency. Moreover, the a…
Semi-strong efficiency of Bitcoin
2018
Abstract This research examines the semi-strong efficiency of Bitcoin in the Bitstamp and Mt.Gox markets, showing how the digital currency responds to monetary policy and Bitcoin events. On the one hand, we observe that Bitcoin has become more efficient over time in relation to its own events. On the other hand, Bitcoin is not affected by monetary policy news, highlighting the absence of any kind of control on Bitcoin. These findings are relevant for investors and policymakers since Bitcoin is a financial asset without any connection to the measures of central banks.
New Challenges of Economic and Business Development – 2012 : Conference Proceedings (May 10 - 12, 2012, Riga, University of Latvia)
2012
Support for Conference Proceedings by ERAF Project "Support for the international cooperation projects and other international cooperation activities in research and technology at the University of Latvia" No. 2010/0202/2DP/2.1.1.2.0/10/APIA/VIAA/013
Coping with Growth and Emigration: Latvian Labor Market Before and After EU Accession
2007
In 2002-2005, Latvian labor market has witnessed dramatic changes related both to unprecedented economic growth and to a massive outflow of labor force after EU enlargement in May 2004. This study, based on micro-level analysis of Latvian Labor Force surveys 2002-2005, provides a detailed analysis of these changes, with a particular focus on developments which are likely to improve living standards of formerly disadvantaged segments of population. The findings suggest that emerging shortage of labor has led to strong wage growth and reduction of unemployment. The author documents increased employment rates and improvements in labor market position of ethnic minorities, elderly, fixed-term w…
Matching inefficiencies, regional disparities and unemployment
2009
. In this paper we apply a stochastic frontier approach to examine how matching inefficiencies and regional disparities in structural factors contribute to regional and aggregate unemployment. Our results suggest that there would be a substantial decline in aggregate unemployment if (i) all local labour offices operated with full efficiency or (ii) they shared the same structure of job seekers and vacant jobs as the most favourable office. In the former case an increase in hirings would lower the average unemployment rate by 2.4 percentage points. In the latter case the decrease would be 1.4 percentage points. Further, we find that fixed effects are positively correlated with both a more f…