base-weighted Laspeyres index

base-weighted Laspeyres index　基本加权的拉斯佩尔指数　

a price index defined as a fixed weight，or fixed basket，index which uses the basket of goods and services of the base period.The base period serves as both the weight reference period and the price reference period.It is identical with a weighted arithmetic average of the current to base period price relatives using the value shares of the base period as weights.