Elevated intracellular Ca 2+ concentrations [Ca 2+ ] appear to be a rather universal trigger of massive membrane ca-pacitance increases, presumably refl ecting exocytosis of tiny vesicles (Borgonovo et al., 2002). The [Ca 2+ ] required to stimulate this response is very high. In this issue Yaradanakul et al. (see p. 29) report experiments with baby hamster kidney (BHK) cells expressing the Na +...

As an input to its estimates of federal revenues, the Congressional Budget Office (CBO) requires an estimate of capital gains realizations in the current calendar year and forecasts of realizations for the next 10 years. The purpose of our study is to improve the accuracy of the current-year estimates. As background, we describe the models and methods that CBO now uses and briefly mention model...