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Input parameters are an important component of model development, verification, and validation. In many population models in a tobacco research setting, input parameters are used to incorporate tobacco use behaviors and risks that occur under scenarios of interest—for example, models to evaluate the health impact associated with introducing a new tobacco or policy that may result in product switching, dual use, or polytobacco use. Input parameters may be obtained be obtained from a variety of data sources, and depending on the objectives of the model, they could may include population surveys representative of the population of interest (e.g., population distribution, birth rates, migration rates, death/other morbidity rates, tobacco product use behavior prevalence). This section provides a characterization of several classes input parameters informative in developing the TIG.  

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