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For a sample of 9,799 subscribers to a single mobile operator, we observe switching between mobile handsets between July, 2011, and December, 2014. We estimate a discrete choice model in which we account for disutility from switching to different operating systems and brands. Our estimation results indicate the presence of significant inertia in the choice of operating systems and brands. We use our model to simulate market shares in the absence of switching costs and conclude that the market shares of Android and smaller operating systems would increase at the expense of the market share of iOS in such a context. 相似文献
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The natural resources upon which the tourism industry relies upon are subjected to intense pressure during and post development. Environmental Impact Assessments (EIAs) are the general method used to evaluate the potential impacts of a development. However, EIAs rarely incorporate an EIA-auditing mechanism, or set environmental standards, for evaluating the long term impacts of a proposed development project. The Baker's Bay Golf and Ocean Club (BBC) serves as a coastal tourism development case study, where an Environmental Management Program (EMP) and prescribed environmental goals were incorporated into the EIA. The goal of this paper is to document the efforts, resources and costs required to implement the EMP in an effort to meet the project goals. Lessons learned include the need to mitigate damaged environments, include measurable ecological goals, and establish an open communications system. Substantial time, costs and resources were necessary to implement the EMP and this information should be incorporated into development planning to establish a process to follow through on EIA recommendations. 相似文献
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