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...

This impact of the COVID-19 on state-owned enterprises (SOEs) and non state-owned enterprises (NSOEs) are different. In addition, the benefits obtained by SOEs and NSOEs through value-added tax (VAT) reduction policy are not the same as well. COVID-19 adversely affect Chinese listed firms but...

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...