We study how sophisticated investors, when faced with changes in information environment, adjust their information acquisition and trading behavior, and how these changes in turn affect market efficiency. We find that, after exogenous reductions of analyst coverage due to closures of brokerage...

In this study, the calibration and validation period with stable underlying surface conditions was determined by using a statistically significant change point of the annual streamflow in several catchments of the Wei River basin (WRB). The effects of climate changes and human activities on...

Using the method of trophic state-composite index ( TSI-CI ) and the 12 months of monitoring data in 2010, we carry out initial exploration of the status of ecosystem health in Wuli Lake. First, we select four indicators, Chla, SD, TP and TN, to conduct trophic state assessment using weighted...

Absorption heating has attracted increased attention due to its irreplaceable advantages in energy conservation and pollution reduction in heating and domestic hot water supplies. This paper presents the classifications and principles of different absorption heating cycles and comprehensively...