Fisher Index

The statistical Index

$$P_B\equiv \sqrt{P_LP_P},$$

where $P_L$ is Laspeyres' Index and $P_P$ is Paasche's Index.

See also Index

References

Kenney, J. F. and Keeping, E. S. Mathematics of Statistics, Pt. 1, 3rd ed. Princeton, NJ: Van Nostrand, p. 66, 1962.