Many empirical studies have applied the Hodrick-Prescott filter in cross-country comparisons of business cycle fluctuations. The Hodrick-Prescott filter involves the smoothing parameter l, and standard practice in the literature is to set this parameter equal to 1600 (in quarterly data) for all...

In this Paper we define and estimate measures of labour market frictions using data on job durations. We compare different estimation methods and different types of data. We propose and apply an unconditional inference method that can be applied to aggregate duration data. It does not require...