We build a model of firm entry and exit and show how returns to scale shape firm survival, the equilibrium productivity and size distributions and firm concentration. High productivity dispersion and high concentration ratios need not reflect inefficiencies when returns to scale are strongly...

Initial public offerings (IPOs) transform private firms into publicly traded ones, therebyimproving liquidity of their shares. Better liquidity increases firm value, which we call"liquidity value". We use a simple model and hypothesize that issuers and IPO in-vestors bargain over the liquidity...

This study investigates and compares the effects of frontline ambidexterity and their components implemented by AI chatbots on hedonic and cognitive smart experience co-creation. The findings first indicate that unlike human frontline employees, chatbots’ frontline ambidexterity is not an...

We propose an interest support based subspace clustering approach to improving the performance of predicting interesting behaviors. The approach uses particular heuristics to discover interesting subspace clusters more efficiently and selects a proper set of subspace clusters to build a cluster...

Shanghai is a low-lying city (3–4 m elevation) surrounded on three sides by the East China Sea, the Yangtze River Estuary, and Hangzhou Bay. With a history of rapid changes in sea level and land subsidence, Shanghai is often plagued by extreme typhoon storm surges. The interaction of sea...

In this paper, we determine the eccentric connectivity index and augmented eccentric connectivity index of fan graph, wheel graph, gear fan graph, gear wheel graph and their r-corona graphs.

Hsu and Berger (J. Amer. Statist. Assoc. 50 (1999) 468) proposed a stepwise confidence interval procedure for identifying the minimum effective dose in dose-response studies under homoscedasticity. In practice, homogeneity of variance is often in doubt. In this paper, we extend Hsu and Berger's...