A new rapid and sensitive high performance liquid chromatography (HPLC) method has been developed for the simultaneous determination of atorvastatin-an antihyperlipidemic drug along with most commonly prescribed drugs (antihyperlipidemic, antihypertensive, antidiabetic, antithrombotic) in bulk and marketed combined formulations. The chromatographic separation was carried out by gradient elution...

In several European countries with Germany leading a remarkable increase in capacities and corresponding electricity generation from wind and photovoltaic power plants took place in recent years. The core objective of this paper is to investigate the possible effects of such a further uptake of renewables on the European electricity markets. The major effects of these developments on the electr...

We consider the problem of estimating a measure of daily volatility from intermittent high-frequency data that are subject to market microstructure effects. We show that a simple Newey-West type modification of the realized variance (RV) yields an unbiased measure of volatility for the ‘open’ part of the day. The modified RV is unbiased even if 1-minute intra-day returns are used. Further, with...

This paper attempts to study the liquidity patterns and to detect any commonality across liquidity measures, using one year intraday data from India's National Stock Exchange (NSE). Using the data on 20 stocks from NSE's NIFTY Index, we found that most of the volume and spread related liquidity measures exhibit an intra-day U-shaped pattern, similar to those found for a market consisting of mar...