This article reviews environmental performance in China's corn production. It proposes that the improvement in environmental and technical efficiency of agricultural production is indispensable for the increased demand for green food and the increasing awareness of environmental protection. This...

The application of continuous time Weibull models on discrete unemployment duration data may result in severely biased baseline estimates. The bias can be substantial even for weekly duration data, and it is seriously aggravated if the Weibull model is erroneously mixed with a Gamma distribution...