An extensive number of studies investigate the effects of political relations on trade by estimating a gravity model using annual (or quarterly) data. We argue that the use of low-frequency data introduces an aggregation bias because the cycle of moderate political shocks is much shorter...

A one-year subsidy program for energy-efficient home appliances has been implemented in China. We construct a dataset consisting of participant and non-participant households in both urban and rural areas of Rizhao city. By applying a quantile regression and counterfactual analysis, this study...

In order to protect carbon/carbon (C/C) composites against oxidation, a (Mo,W)Si2 coating was prepared on the surface of SiC-coated C/C composites by a simple in situ information method using Si, Mo and W as starting materials. The microstructures and oxidation protective ability of the...