很久没有跟新了，最近很是纠结，人生不总是风顺，转折加上旅行，不知道下一站在哪？
NBER这期的bulletin介绍几篇好看的aging和health的wp：
Using Nudges in Exercise Commitment Contracts讲文章"Committing to Exercise: Contract Design for Virtuous Habit Formation" (NBER Working Paper 16624), 作者Jeremy Goldhaber-Fiebert, Erik Blumenkranz, and Alan Garber。他们用网站(www.stickk.com)为基础的合同方式来做随机控制实验来检定财务小nudges对人们是否忠于锻炼允诺的效果，很是有趣。因为里面运用行为经济学关于人对长期、短期决策的假定，到卫生经济学关于weight loss的研究范畴中，又用了网络来做随机试验，实在是亮点多多。
The Effect of Rising Health Care Costs on U.S. Tax Rates 美国的高比例H-GDP是个问题吗？如果大部分决策权是个人手里的话，那是国民自己的意愿，关谁卵事呢（当然States的问题没那么简单，公司买保很多，政府税收预算大把纠葛）？哎~ 先假设这是个big issue吧。Katherine Baicker and Jonathan Skinner的" Health Care Spending Growth and the Future of U.S. Tax Rates" (NBER Working Paper 16772). 自发展了一个宏观模型讨论高比例H-GDP、税收、消费和劳动力供给等因素间的互相作用，我头大！写评论的人最后写到While most observers of the U.S. health care system conclude that there must be a break in the trend of rising real health care costs at some point, it is not clear what policy or condition would effect that change. This study suggests "strains on the revenue-raising system may exert a natural brake on health care spending, and thus may be a key (albeit inefficient) mechanism for constraining overall health care spending growth."欧洲70年代一些国家高tax-GDP比例的国家后来在H-GDP比例上控制得好，虽然效率不咋地，那么堂堂US也要左转看齐用低效的"strains on the revenue-raising system（没看懂！）"来踩啥车吗？
