School of Government, Victoria University of Wellington, Wellington, New Zealand.
Front Public Health. 2024 Aug 27;12:1152710. doi: 10.3389/fpubh.2024.1152710. eCollection 2024.
Obesity, which is partly driven by the consumption of sugar-sweetened beverages (SSBs), significantly increases the risk of type-2 diabetes and cardiovascular diseases, leading to substantial health and economic burdens.
This study aims to quantify the monetary value of health harms caused by SSB consumption, along with the associated internalities, through a contingent valuation survey. The results are crucial for determining the socially optimal tax rate.
We surveyed 293 residents of Wellington, New Zealand, to assess their willingness to pay (WTP) for reductions in the risks of diabetes, stroke, and heart disease associated with SSB intake. Logistic regression analysis revealed the marginal WTP for a 1% risk reduction in diabetes, stroke, and heart disease to be NZ$404.86, NZ$809.04, and NZ$1,236.84, respectively. Based on these values, we estimate the marginal harm from SSB consumption to be approximately NZ$17.37 per liter in New Zealand, with internalities amounting to NZ$6.43 per liter, suggesting an optimal tax rate of NZ$6.49 per liter.
Implementing such a tax is feasible and would likely double or triple the price of SSBs in New Zealand.
肥胖部分是由含糖饮料（SSB）的消费引起的，这显著增加了 2 型糖尿病和心血管疾病的风险，导致了巨大的健康和经济负担。
本研究旨在通过意愿调查评估法来量化 SSB 消费所导致的健康危害的货币价值及其内在关联，这对于确定社会最优税率至关重要。
我们对新西兰惠灵顿的 293 名居民进行了调查，以评估他们对降低与 SSB 摄入相关的糖尿病、中风和心脏病风险的意愿支付（WTP）。逻辑回归分析显示，糖尿病、中风和心脏病风险降低 1%的边际 WTP 分别为 404.86 新西兰元、809.04 新西兰元和 1236.84 新西兰元。根据这些数值，我们估计 SSB 消费的边际危害约为每升 17.37 新西兰元，内在关联为每升 6.43 新西兰元，这表明最优税率为每升 6.49 新西兰元。
实施这样的税收是可行的，这可能会使新西兰的 SSB 价格翻两到三倍。
