Profitability, success probabilities, and incentives for cooperative R&D

As is widely conjectured, duopolists form a cost-sharing cooperative R&D alliance to develop a product - regardless of the probability of research success is either very high or very low. This study establishes that most low probabilities of research success cannot induce a financially successful cooperative R&D alliance. Incorporating the constraints in non-negative expected profits eliminates more than 95% probability of the parameter space where the probability of success is lower than 0.5. Our results further demonstrate that non-negative expected profits are attainable when the monopoly profit is not large in relation to duopoly profits, the fixed cost of R&D investment is low and the demand is large.Cooperative R&D; uncertainty; profitability

Two-photon and two-gluon decays of p-wave heavy quarkonium using a covariant light-front approach

In this paper, a study of two-photon and two-gluon decays in the context of p-wave heavy quarkonia is presented. Within the covariant light-front framework, the annihilation rates of scalar and tensor quarkonium states are derived. In the absence of free parameters in this case, the results for the charmonium decay widths are consistent with the experimental data. However, in comparison to other theoretical calculations, there are large discrepancies in our results regarding bottomonia.Comment: 19 pages, 3 figures, 3 tables, some typos are corrected, version to be published in Phys. Rev.

Complexity growth rates for AdS black holes in massive gravity and f(R)f(R) gravity

The "complexity = action" duality states that the quantum complexity is equal to the action of the stationary AdS black holes within the Wheeler-DeWitt patch at late time approximation. We compute the action growth rates of the neutral and charged black holes in massive gravity and the neutral, charged and Kerr-Newman black holes in $f(R)$ gravity to test this conjecture. Besides, we investigate the effects of the massive graviton terms, higher derivative terms and the topology of the black hole horizon on the complexity growth rate.Comment: 11 pages, no figur