The Bureau of Labor Statistics (BLS) tracks and publishes PPIs every month. BLS collects data from domestic producers by systematic sampling. They calculate PPI for 10000+\u00a0 different products each month. Plus, they ignore the volatile prices (prone to fluctuation) to get a more stable index reading.<\/p>\n
Before 1978, PPI was known as Wholesale Price Index (WPI)<\/a>.<\/p>\n PPI is a family of indexes that tracks price changes in three major categories. These categories include:<\/p>\n BLS calculates industry-based PPIs by tracking price change at the production level for each specific industry. Currently, BLS is publishing PPIs for 535+ industries, 4000+ sub-industries, and 500+ groups of industries.<\/p>\n BLS calculates commodity-based PPIs by tracking fluctuations in prices solely based on products. Irrespective of industry or origin, it assembles products according to their similarity, overall usage, and composition. Currently, there are commodity price indexes for 3700+ goods and 800+ for services.<\/p>\n BLS calculates the FD-ID index by using commodity price indexes according to the type of buyers. They essentially track price changes of goods sold to either intermediate or final-demand customers.<\/p>\n Final demand customers are the class of buyers that obtain final products like a cycle, wheat flour, etc. In contrast, intermediate buyers obtain semi-finished products that are further used to produce final products. Examples include steel, wheat, etc.<\/p>\n More than 600 FD-ID PPIs are available.<\/p>\n We have four different formulas for calculating PPI:<\/p>\n Where,<\/p>\n Basket value refers to the price of a fixed set of goods at a given time.<\/p>\n Where,<\/p>\n Qo = Quantity in the base period<\/p>\n Po = Price in the base period<\/p>\n Pt = Price in the current period<\/p>\n Where,<\/p>\n Qo = Quantity in the base period<\/p>\n Qt = Quantity in the current period<\/p>\n Po = Price in the base period<\/p>\n Pt = Price in the current period<\/p>\n This formula calculates a mean PPI by using the Laspeyrees and Paasche formula.<\/p>\n PPI (Fisher) = <\/i>\u221a <\/i>(Laspeyres Calculation \u00d7 Paasche Calculation)<\/i><\/p>\n Suppose we have the following price change data alongside product prices for 2010 (base period) and the year (2020).<\/p>\n (Base Period)<\/td>\n (Current Period)<\/td>\n (Base Period)<\/td>\n (Current Period)<\/td>\n<\/tr>\n Let\u2019s calculate the PPI index by using the Laspeyres formula:<\/p>\n Next, let\u2019s calculate it using the Paasche formula:<\/p>\n Now, it\u2019s time to use Fisher’s formula:<\/p>\nClassification of PPI<\/h2>\n
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Industry-Based PPIs<\/h3>\n<\/li>\n<\/ul>\n
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Commodity Based PPIs<\/h3>\n<\/li>\n<\/ul>\n
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Final Demand-Intermediate Demand (FD-ID) Based PPIs<\/h3>\n<\/li>\n<\/ul>\n
How to Calculate PPI?<\/h2>\n
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Basic Formula<\/h3>\n<\/li>\n<\/ul>\n
![\"basic-formula-calculate-ppi\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/basic-formula-calculate-ppi.jpg\")
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Laspeyres Formula<\/h3>\n<\/li>\n<\/ul>\n
![\"laspeyres-formula-calculate-ppi\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/laspeyres-formula-calculat-ppi.jpg\")
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Paasche Formula<\/h3>\n<\/li>\n<\/ul>\n
![\"paasche-ormula-calculat-ppi\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/paasche-formula-calculat-ppi.jpg\")
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Fisher Formula<\/h3>\n<\/li>\n<\/ul>\n
Example of PPI Calculation<\/h2>\n
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\n Quantity<\/p>\n Quantity<\/p>\n Price<\/p>\n Price<\/p>\n \n 10<\/td>\n 15<\/td>\n 18<\/td>\n 10<\/td>\n<\/tr>\n \n 30<\/td>\n 35<\/td>\n 20<\/td>\n 25<\/td>\n<\/tr>\n \n 25<\/td>\n 27<\/td>\n 35<\/td>\n 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ![\"ppi-index-laspeyres-formula\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/ppi-index-laspeyres-formula.jpg\")
<\/a><\/p>\n![\"ppi-index-paasche-formula\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/ppi-index-paasche-formula.jpg\")
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![\"ppi-index-fisher-formula\"](\"https:\/\/sblog.seebiz.com\/blog\/wp-content\/uploads\/2023\/04\/ppi-index-fisher-formula.jpg\")
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