With the rapid development of the Internet, the online shopping market expands constantly. Inspired by fierce competition and complex and diverse consumer demand, personalized recommendation has become an effective marketing tool for e-commerce enterprises. However, the existing recommendation...

In this paper, I empirically examine the non-monotonic relationship between openness and within-group wage inequality predicted by  Helpman et al. (2010) using a panel data for the US, 1983–2005. Within-group wage inequality is measured for each industry and matched with exports. It can be...

This study analyzes financial risk factors of China’s Small and medium-sized enterprises (SMEs), employing Alexander Bathory model for the currently available data on the small and medium enterprise board in Shenzhen Stock Exchange. Financial risk is measured by the Alexander Bathory model....

The dynamics characteristic and effect of atoms and particulates ejected from the surface generated by nanosecond pulsed-laser ablation are very important. In this work, based on the consideration of the inelasticity and non-uniformity of the plasma particles thermally desorbed from a plane...

To insure a proper and meaningful productivity assessment of DMUs with different production technologies, this article develops a difference-based profit metafrontier Luenberger productivity indicator. Adopting the proposed model, we empirically measure the profit inefficiency and examine the...

<title>Abstract</title> This paper estimates comprehensive operational performance measures for transport services. A network efficiency approach is used to analyze the production efficiency, service efficiency, and operational efficiency in a unified framework to reflect the transportation service...

<title>Abstract</title> This paper aims to modify the Stage 1 data envelopment analysis (DEA) of the three-stage DEA approach to allow for the fact that undesirable outputs like aircraft noise may not be freely disposable, and the efficiency measure of airport capacity use is modified to allow for an...

<title>A<sc>bstract</sc> </title> This study employs the directional graph distance function and the multiactivity data envelopment analysis (DEA) approach, which incorporates both desirable and undesirable outputs, in order to provide a more complete representation of the multimode bus production technology from which...

Following the spirit of the enhanced Russell graph measure, this paper proposes an enhanced Russell-based directional distance measure (ERBDDM) model for dealing with desirable and undesirable outputs in data envelopment analysis (DEA) and allowing some inputs and outputs to be zero. The...