index number

n.

物价、人口等的指数；

Essays in Index Number Theory
Index Number Issues in the Consumer Price Index
An index number system for rating water quality
The Ideal Log-Change Index Number
Index Number Theory Using Differences Rather Than Ratios
Index Number and Factor Demand Approaches to the Estimation of Productivity
Environmental performance: an index number approach
Measuring total factor productivity of airports— an index number approach
Economic monetary aggregates an application of index number and aggregation theory ☆
A DNA-Based Registry for All Animal Species: The Barcode Index Number (BIN) System