Exact lower bound on the correlation function and susceptibility are obtained in terms of the quantity r∗=r0+(12u/(2π)d)∫ ddl〈ϕlϕ−l〉, where 〈ϕlϕ−l〉 are the exact averages. Further lower bounds are obtained on r∗, relating it to an exactly soluble model.

One of the most important and most contentious issues for regulation and competition raised by the 1996 Telecommunications Act is when to authorize the regional Bell companies to offer long-distance services. The Department of Justice (DOJ) adopted a standard requiring that a Bell's local market...

We consider the stochastic dynamics of constrained systems. It is shown that by expressing the Lagrange multipliers in terms of quantities that are local in time, exact and potentially useful dynamic equations of the Langevin, Fokker-Planck and Smoluchowskii equations are obtained. The equations...

In Germany, a growing tendency can be observed to focus business incubators (BIs) and technology centers and their respective support elements and processes as well as the selection criteria applied by the incubator management on firms from solely one sector or few but complementary sectors and...

On the basis of a sample of 149 graduate firms from five German technology oriented business incubators, this article contributes to incubator/incubation literature by investigating the effects of the age of the business incubators and the firms’ incubation time in securing long-term survival...

<DIV>Mintz and Schwartz offer a fascinating tour of the corporate world. Through an intensive study of interlocking corporate directorates, they show that for the first time in American history the loan making and stock purchasing and selling powers are concentrated in the same hands: the leadership...</div>

Knowledge of factors that determine the transition from nascent entrepreneurship to real entrepreneurship is of major importance for policies aiming to stimulate start-ups effectively. Scholars have concentrated mainly on person-specific factors to explain transition probabilities, and...