来自MSN7 小时
iPhone17 Air实机泄露！摄像头大砍只为超薄！价格贵过Pro…
今年最值得大家期待的新款iPhone出现了。 众所周知，iPhone Plus机型的销量一直处于“掉队”水平，曾经破发和掉价速度更是创下苹果的纪录。 这下苹果也得“洗心革面”了，今年直接来个大动作，用全新的iPhone 17 ...
National Bureau of Economic Research21 小时
Self-Control and Demand for Preventive Health: Evidence from Hypertension in India
We document varying levels of takeup of the different commitment contracts, but find no effects on actual doctor visits or individual health outcomes. Thus, a substantial number of individuals pay for ...