Before revision:  An extensive empirical investigation using data based on the S&P500 market index over a period ending in early-2013 is conducted. Substantial empirical support for dynamic jump intensities is documented, with predictive accuracy enhanced by the inclusion of this type of specification.
After revision:  An extensive empirical investigation using data based on the S&P500 market index , with substantial support for dynamic jump intensities is documented, with predictive accuracy enhanced by the inclusion of this type of specification.