This thesis lies at the intersection of mathematics, finance and numerical methods. The financial question of how to model credit risk, specifically corporate bond defaults, and how to model correlations between defaults, motivates our study of the mathematics behind a specific kind of credit...

Firms can purchase innovation results to improve their technology. In this context, the key to transfer success is reasonably priced innovation results. Considering the match between innovation results and firm technology, this study analyzes the nonlinear improvement effect of innovation...

Mulching and biochar are increasingly used individually in agriculture, but little is known about their combined effects on N2O distribution and dispersion in ridge and furrow profiles. We conducted a 2-year field experiment in northern China to determine soil N2O concentrations using the in...

In this paper, I examine how labor shortage affects hiring-return relationship. I construct firm-year level measure of labor shortage using textual analysis of firms' SEC fillings. I show that the negative relationship between firm's hiring rate and its future return is only significant for...

Although saline aquatic ecosystems are important emitters of greenhouse gases (GHGs), dynamic changes in GHGs at the sediment-water interface remain unclear. This study conducted four sampling campaigns in Daihai Lake, a eutrophic saline lake in a semi-arid region of northern China. The aim of...

In this paper, we propose an approach based on mean-conditional-value-at-risk (MCVaR) to Euler capital allocation via adjusting the probability level, which takes into account the different attitudes of investors towards risk by considering the optimistic coefficient. We obtain a new probability...