Excessive phosphate in water will inevitably cause eutrophication. Efficient removal of phosphate is of great significance to inhibit water eutrophication, however, humic acid (HA) in water aggravates the uncertainty of phosphate removal. In this work, mesoporous zirconia nanofiber (MZN) was...

Using a dataset on customer-supplier links, we study the relation between customer concentration, the dynamic of customer-supplier relationship, and bank loan terms in China. Empirically, we find that higher customer concentration significantly increases the amount of bank loans and the duration...

This paper solves the robust portfolio selection problem with spectral risk measures under mixture R-vine copula uncertainty. Spectral risk measures are used to capture investors’ subjective risk aversion while R-vine copula change-point detection is employed to better construct mixture R-vine...

Purpose: This paper aims to explore coopetition within the entrepreneurial ecosystem and answer the following two fundamental questions: How does coopetition affect the entrepreneurial learning and performance of startups? and What learning strategies should startups adopt to promote their...