the main objective of the present study was to formulate gastroretentive effervescent sustained release drug delivery systems of risperidone floating tablets with the help of methocel® k15, ethocel® standard 7fp premium, eudragit ® rs100 sustained release polymers to improve its safety profile, bioavailability and patient compliance. risperidone floating tablets were formulated by wet granulati...

Based on the fundamental equations of equity valuation, we derive here the relationship between the equity risk premium, duration and dividend yield. Aside from providing a logical foundation for the difference between the ex-ante and ex-post measures of the risk premium, the work leads to other outcomes, namely, but not specifically, (1) that the current, effective dividend policy is a signall...

Constant levels of perceptual quality of service is what ideally users of multimedia services expect. In most cases, however, they receive time-varying levels of quality of service. This paper describes a technique to deliver nearly constant perceptual quality of service when transmitting video sequences over Differentiated Services IP networks. MPEG video packets are transmitted either as low-...

This paper presents a new scheduling scheme to support premium service in the Differentiated Service (DiffServ) architecture. It is based on weighted packet scheduling policies such as weighted round robin or fair queueing. The key feature of the new scheduling scheme is to change the scheduling weights of Behavior Aggregates adaptively. By adaptively adjusting the weights according to the dyna...

We investigate whether the volatility risk premium is negative by examining the statistical properties of delta-hedged option portfolios (buy the option and hedge with stock). Within a stochastic volatility framework, we demonstrate a correspondence between the sign and magnitude of the volatility risk premium and the mean delta-hedged portfolio returns. Using a sample of S&P 500 index options,...

Theoretical models of guaranteed renewable insurance display front-loaded premium schedules. Such schedules both cover lifetime total claims of low-risk and high-risk individuals and provide an incentive for those who remain low-risk to continue to purchase the policy. Questions have been raised of whether actual individual insurance markets in the US approximate the behavior predicted by these...

This paper asks if "higher education as a signal" helps explaining the comovements between college enrollment rate and skill premium for younger workers in the US from 1973 to 2005. In my model a continuum of agents, heterogeneous in talent and initial wealth, make schooling and working decisions: work now or take up college first? When college is very expensive only the wealthy can afford it, ...

In a two-cone Heckscher–Ohlin model with CES preferences and a continuum of goods, new northern goods increase the northern skill premium if they are skilled-labor intensive, and may increase the premium if they are unskilled-labor intensive. Thus, the introduction of new goods into US technology could have done more to increase the US skill premium than a closed-economy model would predict. I ...

The study examines the reason for the significant increase in the ‘age premium’ over the period 198194. The age premium refers to the percentage difference in hourly earnings between ‘younger’ (25-34) and ‘older’ (45-54) workers. In 1994, the hourly rate of older males was 32.4% higher than that of younger males. The corresponding age premium among females was 15.5%. Over the period 1981-94, th...

Wage-Hours Contracts, Overtime Working and Premium Pay This paper offers a contract-based theory to explain the determination of standard hours, overtime hours and overtime premium pay. We expand on the wage contract literature that emphasises the role of firm-specific human capital and that explores problems of contract efficiency in the face of information asymmetries between the firm and the...