Evaluating the returns to marketing spending and designing optimal budget allocations have been challenging tasks for businesses. New data availability and novel machine learning methods provide new opportunities to significantly improve such decisions. The goal of this paper is to prescribe the...

File sharing service gives network users the liberty to download contents such as music and videos, but this results in heavy traffic occupying Internet Service Providers' (ISP) bandwidth. ISPs could adopt certain measures such as granting low speed to file sharing users to effectively manage...

In this paper, we establish two preservation results of additive convexity for a class of optimal transformation problems and a class of optimal disposal problems. For both classes of problems, there are multiple resources and our results show that if these resources have different priorities to...

In this paper, we study a hybrid RDC-DC serial inventory system where the RDC replenishes its stock from an outside supplier, while the DC faces random demand and replenishes its stock from the RDC. However, unlike in the traditional serial system, the DC itself can replenish its inventory from...

Artificial photosynthesis, coupling CO 2 photoreduction and water photooxidation reactions, is an important and green means to convert CO 2 . Compared with traditional multiphasic heterojunctions, monophasic photocatalysts for artificial photosynthesis are still very rare. Here we construct a...

We propose that differences between overnight and daytime returns are the result of return extrapolation. After high daytime returns, morning order imbalances are high in the first 15 minutes of regular trading the next day, which is consistent with higher overnight returns. The effect is...