The aggregate production function approach is one way to forecast future energy demand (a step in forecasting carbon dioxide emissions, for example) and to analyze the aggregate economic effects of measures such as the increase of taxes on energy use. The results of such an approach tend to...

The U.S. poverty rate, like many other aggregate economic time series, shows considerable persistence. It is logical to consider the model involving a unit root to provide a good description of the data generation process for the poverty rate. We pretest for unit roots in annual U.S. poverty...