Dummy endogenous variables are commonly encountered in program evaluations using observational data. Motivated by the increasing availability of rich micro data, we develop a two-stage approach to estimate the dummy endogenous treatment effect using high-dimensional instrumental variables (IV)....

This paper proposes an quasi maximum likelihood estimator (QMLE) for effective spread by approximating the distribution of the logarithm of price range with a normal distribution based on Roll's price model and also investigates the statistical properties of the QMLE. Besides, Monte Carlo...

A waterlogging experiment under a rain shelter was used to investigate the response mechanism of waxy maize plant growth, ear yield, and quality to waterlogging at various growth stages. Waterlogging for 10 d treatments were carried out at V6-VT (W V6-VT ), VT-R1 (W VT-R1 ) and R1-R3 (W R1-R3 )...

Hydrogen as a future energy carrier can be used for grid power peak shaving and valley filling and has thus attracted widespread attention. However, how to provide high-temperature heat for water electrolysis is an urgent challenge that needs to be overcome. This paper adopts two gas-solid...