In this paper, we obtain new oscillation criteria for second-order half-linear impulsive differential equations having fixed moments of impulse actions. We also generalize the results to nonlinear impulsive equations. The oscillation criteria obtained in this paper can be considered as extensions of those given by Leighton, (J. London Math. Soc. 27 (1952)), Coles (Proc. Amer. Math. Soc. 19 (196...

In their article “An Arbitrage-Free Approach to Quasi-Option Value” [J. Environm. Econom. Management 35, 103-125, 1998], Coggins and Ramezani interpreted the concept of quasi-option value introduced by Arrow and Fisher [Quart. J. Econom. 88, 1974, 312-319] as being identical to Dixit and Pindyck’s real option value. This means their approach differs from the approach by Fisher and Hanemann [J. ...

We hypothesize that owing to limited investor attention and skepticism of complexity, innovative diversity (ID) of a firm's patent portfolio will be undervalued. ID strongly predicts stock returns after controlling for firm characteristics and risk. High ID portfolios provide Carhart alphas of 56-81 basis points per month and stronger and less volatile operating performance. The Diversified Min...

and Applied Analysis 3 Next we present auxiliary statements which play important roles in proving the main results. Define F : 0,∞ → R by F x Φ x/q−1/q −Φ 1−1/x and h : Φ −∞ q ,∞ → R by h x x 1 − q1−α [ 1 − ( 1 ( q − 1 ) Φ−1 x )1−α] . 2.1 For y : q0 → R \ {0} define the operator L by L [ y ] t Φ ( y ( q2t ) qy ( qt ) − 1 q ) −Φ ( 1 − y t

the us foreign policy processes in the middle east, in the post world war ii period, have always brought about security challenge, danger and crisis, in the region. all us presidents have experienced grave security crisis in this geopolitical area. there also exists many indications of distrust of the current foreign us policy exercised in the middle east on the part of middle eastern citizens....

the united states policy toward iran during 1985-7 is a significant issue. the us had followed a confrontationist policy toward iran after the 1979 revolution but a shift in the policy could be observed in the mid 1980's in the form of us attempts to make a rapprochement possible. this article explains this shift through the examination of the impact of this variable: solving us problems i...