In econometrics, the Bry and Boschan routine finds statistical maxima and minima while using certain censoring rules and phase and cycle length constraints. [1] [2]
The OECD has composite leading indicators and turning points that are recession indicators with peak through the trough turning points chronologies determined by the rules in a computer routine (Bry and Boschan) [3]
The U.S. National Bureau of Economic Research (NBER) uses a computer routine (Bry and Boschan) and includes a Phase-Average Trend (PAT) detrending procedure. The turning point detection algorithm is decoupled from the de-trending procedure. [4]