The objectives of the paper is to: (1) adopt hierarchical forecasting methods in modelling and international tourist arrivals Zimbabwe; (2) coming up with Zimbabwe Prediction Intervals (PIs) Quantile Regression Averaging (QRA) to tourism forecasts. Zimbabwe’s monthly data from January 2002 December 2018 was used. dataset used before COVID-19 period were disaggregated according purpose visit (PO...

6 The available water in a catchment depends on where and when the water is taken. This raises 7 considerable man-made uncertainty in water availability. Partly due to this uncertainty, catchments are 8 over-allocated almost everywhere. The over-allocation problem could be managed more effectively if 9 catchment managers could match users’ rights to the available water. In this paper, I show ho...

We consider a production planning problem under uncertainty in which companies have to make product allocation decisions such that the risk of failing regulatory inspections of sites and consequently losing revenue is minimized. In the proposed decision model the regulatory authority is an adversary. The outcome of an inspection is a Bernoulli-distributed random variable whose parameter is a fu...

The desire to increase domestic revenue mobilization has made tax reform a priority for governments in many developing countries. Addressing the tax problem, however, is often a complex process that involves reforming the tax system, as well as setting up effective administrative structures to administer that system. Many see the revenue authority (RA) model as the solution to these problems. D...

National governments can only tax the economic activity they either directly observe or that is reported by municipal authorities. mining, a very common phenomenon in Colombia, changed with a tax reform that reduced the share of revenue transferred back to mining municipalities. To overcome the challenge of measuring illegal activity, we construct a novel dataset using machine learning predicti...

Fair sharing and efficient allocation of risks, returns and resources are considered cornerstones of Public Private Partnerships. However, allocation of certain risks, like demand risks, have emerged as pain points. This paper examines the impact of demand uncertainty on a firm’s bidding behavior. Applying econometric models, to check for inconsistencies in firm behavior, on bid data of toll ro...

A model to examine the choice by jurisdiction whether to finance roads with taxes or tolls is developed. The idea of decentralized, local control and multiple jurisdictions distinguishes this analysis from one where a central authority maximizes global welfare. Key factors posited to explain the choice include the length of trips using the roads, the size of the governing jurisdiction, the elas...

This paper is slightly adapted from my master’s thesis. It addresses the first objective which was to determine types of user education practices on utilization electronic resources at Kenya Revenue Authority (KRA) library. The purpose this assess how are planned, organized and implemented KRA Library in response challenge orientation, training instructing users use information sources services...