Wei, Yiming

Gang Wu, Yi-Ming Wei, Chris P Nielsen, Xi Lu, and Michael B. McElroy. 2012. “A dynamic programming model of China's strategic petroleum reserve: General strategy and the effect of emergencies.” Energy Economics, 34, 4, Pp. 1234-1243. Publisher's VersionAbstract
To protect the security of energy supply, China is building national strategic petroleum reserve (SPR). We present a dynamic programming model to determine the optimal stockpiling and drawdown strategies for China's SPR under various scenarios, focusing on minimizing the total cost of reserves. In contrast to previous research, the oil price given in our model is exogenous on a monthly instead of annual basis, with a view to more realistic simulation of optimal strategies each year. Our model results show that in the case where stockpiling affects oil prices, a given SPR size will be achieved earlier than when stockpiling does not affect oil prices. In different emergency conditions, the optimal stockpiling and drawdown strategies of China's SPR are very different. When an emergency occurs, the shock of stockpiling on the oil price per barrel could range $0.49–$6.35, while the impact of drawdown on the oil price per barrel could range −$6.22 to −$0.48.
Yi-Ming Wei, Lan-Cui Liu, Ying Fan, and Gang Wu. 2007. “The impact of lifestyle on energy use and CO2 emission: An empirical analysis of China’s residents.” Energy Policy, 35, 1, Pp. 247-257. Publisher's VersionAbstract
Based on the application of a Consumer Lifestyle Approach (CLA), this paper quantifies the direct and indirect impact of lifestyle of urban and rural residents on China's energy use and the related CO2 emissions during the period 1999–2002. The results show that approximately 26 per cent of total energy consumption and 30 per cent of CO2 emission every year are a consequence of residents’ lifestyles, and the economic activities to support these demands. For urban residents the indirect impact on energy consumption is 2.44 times greater than the direct impact. Residence; home energy use; food; and education, cultural and recreation services are the most energy-intensive and carbon-emission-intensive activities. For rural residents, the direct impact on energy consumption is 1.86 times that of the indirect, and home energy use; food; education, and cultural recreation services; and personal travel are the most energy-intensive and carbon-emission-intensive activities. This paper provides quantitative evidence for energy conservation and environmental protection focused policies. China's security for energy supply is singled out as a serious issue for government policy-makers, and we suggest that government should harmonize the relationships between stakeholders to determine rational strategies.