In this paper, a new hypothesis of fuzzy number has been proposed which is more precise and direct. This approach considered as an equivalence class on set real numbers R with its algebraic structure properties along theoretical study computational results. Newly defined provides well-structured summary that offers both deeper knowledge about the theory extensive view algebra. We field newly op...

Firms with superior productivity, labeled superstar firms, are argued to be the link between rising concentration and fall of aggregate labor share in US. This analysis confirms that similar evidence is found within European context: market firm size increase, whereas decreases productivity. One much discussed mechanisms behind this development spreading fixed overhead costs: Highly productive ...