This note provides some evidence of the sensitivity of firm survival duration dependence to time aggregation, when durations are Weibull distributed. The results indicate that estimates of duration dependence are always positively biased: This bias increases with the width of time aggregation...

A method is presented that takes into account the day-of-the-week and the turn-of-the-month effect and the holiday effect and embodies them to neural network forecasting. It adjusts the time series in order to make its dynamics less distorted. After a predicted value is calculated by the...