This paper considers estimation and inference for varying-coefficient models with nonstationary regressors. We propose a nonparametric estimation method using penalized splines, which achieves the same optimal convergence rate as kernel-based methods, but enjoys computation advantages. Utilizing...

This paper studies the robust estimation and inference of threshold models with integrated regres- sors. We derive the asymptotic distribution of the profiled least squares (LS) estimator under the diminishing threshold effect assumption that the size of the threshold effect converges to zero....

The problem of designing a rebalancing algorithm for a large-scale ridehailing system with asymmetric (unbalanced) demand is considered here. We pose the rebalancing problem within a semi Markov decision problem (SMDP) framework with closed queues of vehicles serving stationary, but asymmetric...

This paper introduces a conceptual framework and a computational model for individual tariffs for mobile communication services. The purpose is to provide guidance for implementation by communication service suppliers or user groups alike. The paper first examines the sociological and economic...

This paper examines the role of international trade for economic prosperity in Pacific island countries (PICs), discusses their comparative advantage, and explores the potential for trade, and tourism in particular, to serve as a locomotive for inclusive economic growth. We find the trade...

Natural disasters bring tremendous destruction to small island economies in the South Pacific region. Foreign development aid, as an important source of green finance in the region, has the fundamental purpose of reducing natural disasters' effect on the small island economies. With country...