Het rekenkundig gemiddelde stijgingspercentage – een ondoelmatige groei‐indicator

Summary  In business practice it happens that annual growth is measured by the ordinary (arithmetic) average of yearly growth percentages. It is argued that there are better methods in any case. A method requiring relatively much time is least squares. Methods requiring very little time are a) determining growth graphically, using semi‐logarithmic graph paper b) computing the geometrical average, which is nothing else than the n ‐th root (if there are n +l observations) of the ratio between the last and first observation. In a table, a survey of bias and dispersion of three estimators is given for a few numerical cases.