ON THE TAXATION OF DURABLE GOODS
用动态Mirrlees模型研究耐用品的最优商品税，发现即使消费偏好与劳动可分，统一税率也非最优；在无摩擦时耐用品投资税率应高于非耐用品，有摩擦时则取决于替代效应，并应用于住房投资应比普通消费税率更高。
Abstract This article proposes a dynamic Mirrleesian theory of commodity taxation in the presence of durable goods. A uniform taxation across all goods is suboptimal even when the consumption preferences are separable from labor. If the consumption utility function is strictly concave and durable stocks are adjustable without friction, durable investment should be taxed at a higher rate than the purchase of nondurable goods. With adjustment frictions, the wedge on durable investment depends on substitution effects between durable and nondurable consumption and can be positive or negative. An application suggests that housing investment should face higher tax rates than regular consumption.