The present investigation aims at modeling the sales response to advertising and, in the process, sheds some light on the sales-advertising relationship subject, which has been at the center of a decades-long controversy due to its inherent complexities. We studied three Colorado Lottery games,...

Recent studies of innovation diffusion have investigated cross-country heterogeneity, but implicitly assumed within-country homogeneity. As such, these studies potentially overlook within-country variations in diffusion patterns, which may be even more important to marketing managers and...

Getting a new product adopted - even if it has obvious advantages - is difficult. Many innovations require a long period from the time they become available to the time they are widely adopted.This study was conducted to determine some characteristics of new product diffusion processes in...

The major goal of this thesis is to contribute answering the question how changes in economic actions affect the climate and at the same time, how do changes in the climate affect the economy. This thesis consists of three parts. In the first part (Chapter 2) we stress the role of the oceans as...

This research focuses on urban water policy. The three papers extend the literature through economic application, taking theory in a direction that informs water resource managers on optimal decision-making or a better approach to management. Three primary results are: first, that the optimal...

Acall center with both contract and noncontract customers was giving priority to the contract customers only in off-peak hours, precisely when having priority was least important. In this paper, we investigate whether this is rational behavior on the part of the call center and what the...

We solve an optimal growth model in continuous space, continuous and bounded time. The optimizer chooses the optimal trajectories of capital and consumption across space and time by maximizing an objective function with both space and time discounting. We extract the corresponding Pontryagin...

We develop a theory of optimal stopping problems under ambiguity in continuous time. Using results from (backward) stochastic calculus, we characterize the value function as the smallest (nonlinear) supermartingale dominating the payoff process. For Markovian models, we derive an adjusted...

In this work the dynamical framework which combines different aspects of innovative activity is analyzed. First the basic model with finite time horizon is constructed where the single agent (planner) is optimizing his stream of investments into the process of creation of new products together...

In recent years, government aid agencies and international organizations have increased their financial commitments to controlling and eliminating malaria from the planet. This renewed emphasis on elimination is reminiscent of a previous worldwide campaign to eradicate malaria in the 1960s, a...