laspeyres index การใช้

Before that it had used the Laspeyres index, a fixed-weight method.
The first to use weighted index numbers, Lowe in effect anticipated the Laspeyres index.
Similarly, the Laspeyres index can be thought of as a price index taking the bundle of goods using current prices and base period quantities as the numeraire.
In " Updated Summary of NIPA Methodologies " ( 2006 ), they seem to describe real GDP as being calculated as a Laspeyres index with base year 2000:
Thus the index is a fixed-weight index, but rarely a true Laspeyres index, since the weight-reference period of a year and the price-reference period, usually a more recent single month, do not coincide.