摘要：依據美國農業部發佈的官方資料顯示，目前六歲到十七歲的學童中，有大約11%的學童屬於體重過重。相較於三十年前的情形而言，此一比例增加了一倍之多。學童的體重過重問題，不單單侷限於美國，相似情形也發現存在於其他國家中。在許多可能導致學童體重過重的因子中，有糖類飲料的攝取已被認為可能是造成學童肥胖不可或缺的原因。有鑑於此，本研究的主要重點在於調查目前臺灣學童飲料攝取和其體重的關連性。此研究相較於先前的研究有些許的不同。首先，我們考慮各種飲料的消費為一個全面性的設限需求系統 (censored system)，而非單獨的分開分析個別的產品，藉此一較完善分析可以探討各種不同飲料消費間之關係。因為美國目前已對此議題有初步研究，為了有效地吸取美國經驗並對我國情形加以詳細對照，我們同時調查美國與臺灣學童飲料消費和其體重的關係，並做跨國的實證比較分析。若兩國之間研究結果存在顯著的差異時，我們預期更進一步探討存在此差異的原因，研究此差異是來自與生俱來且不可改變的稟附條件還是後天可經由政府政策施行而改變的因素。此一詳細的兩國對比與區分，能依國情的不同，對臺灣未來防止學童肥胖上政策實施更能有效地參考美國的實施經驗，並加以改進。
Abstract: According to the historical data reported by the United States Department of Agricultural Economics, 11% of the U.S youths aged between 6-17 years are seriously overweight, which is more than double than 30 years ago. The increasing risk of being childhood overweight is a global problem in the United States and other countries. Among all of the factors that might contribute to children obesity, soft drinks consumption has been shown as an important determinant. As such, the primary purpose of this study is to investigate the association between beverage consumption and children obesity in Taiwan. This study will set apart from previous studies in several respects. First, we estimate a censored system of beverage consumption in order to capture the potential interrelationship between different beverage consumption. Second, we will not only estimate the effects of beverage consumption on children obesity, but also compare these effects in both cases of USA and Taiwan. If there is any difference found between these two countries, we then go further to decompose body weight difference between these two countries into three components: individual effect, price of observable characteristics effect, and residual effect. This distinction will provide comprehensive understanding of the effects by soft drinks consumption on body weight between these two countries. In addition, it is important for policy recommendation in Taiwan based on the USA experience.
soft drinks consumption