Frictionless economy and its implementation in real world

Frictionless economy is the new concept emerged from late 90s1. Its core idea is to remove the time both suppliers and customers spend on the trial and error on the price. So the markets always perform on the equilibriums. So markets can work in the perfect efficiency. But due to the various reasons, frictionless economy is rarely seen in the real world. The most common reason is lack of information. In last decade, the rise of internet and wide uses of IT technologies within businesses made the collection of information to be easier. Such trend renews people’s interesting on the frictionless economy. In this paper, we examine how exactly frictionless economy works and various reasons to prevent it to happen. We also suggest several solutions allow people to implement the frictionless economy in the real world if the only reason prevent them to have it is lack of information.frictionless economy, equilibrium, perfect efficiency, online surveys, single item auction, selling data analysis, local equilibrium and global equilibrium

Tensor stability in Born-Infeld determinantal gravity

We consider the transverse-traceless tensor perturbation of a spatial flat homogeneous and isotropic spacetime in Born-Infeld determinantal gravity, and investigate the evolution of the tensor mode for two solutions in the early universe. For the first solution where the initial singularity is replaced by a regular geometric de Sitter inflation of infinite duration, the evolution of the tensor mode is stable for the parameter spaces $\alpha<-1$, $\omega\geq-1/3$ and $\alpha=-1$, $\omega>0$. For the second solution where the initial singularity is replaced by a primordial brusque bounce, which suffers a sudden singularity at the bouncing point, the evolution of the tensor mode is stable for all regions of the parameter space. Our calculation suggests that the tensor evolution can hold stability in large parameter spaces, which is a remarkable property of Born-Infeld determinantal gravity. We also constrain the theoretical parameter $|\lambda|\geq 10^{-38} \text{m}^{-2}$ by resorting to the current bound on the speed of the gravitational waves.Comment: 14 pages, added a general discussion on the tensor stability in Sec. 3, and added Sec. 5 on the parameter constraint, published versio