331 331 Ⅷ Index Numbers of Commodity Prices in Agriculture E x p l a na t i o n This part shows the results of the "Index Numbers of Commodity Prices in Agriculture" released by the Statistics Department of the Ministry of Agriculture, Forestry and Fisheries (hereafter MAFF). The Statistics Department of MAFF has continually calculated and published since April 1948, having made several revisions of base period and index items. In the revision for 2000 base, along with the discontinuation of the index numbers of materials for daily life, the "price index to measure the economic trends in rural areas and price level fluctuation" was replaced by the "price index to measure the price fluctuation in agricultural input and output", and "Index numbers of commodity prices in rural areas" was also revised as "Index numbers of commodity prices in agriculture". Index numbers of wages for temporary agricultural employees were discontinued in the revision for 2005 base. The calculation methods of the index numbers of commodity prices in agriculture are as follows: 1 Calculation methods of base year price and indices The 2010 base Index has been calculated since July 2012. When the revision for 2010 base was made, to enable comparison between new and old indices, the indices up to 2009 were linked with the new indices (base year = 2010) multiplying the link coefficient derived from the 2010 indices (base year = 2005). This liking was made separately for all items, groups and items. Base year price and other factors for calculating the indices are as follows: (1) Base year price Base year price is the annual average price of 2010, based on the results of the "Statistical Survey on Commodity Prices in Agriculture". It is calculated as follows: a Agricultural products Firstly, each of the monthly national average prices of 2010 is calculated by the weighted average of the monthly prefectural average prices, using shipment quantities of 2009 and 2010 as its weight. Secondly, each of the yearly (annual) national average price is calculated by the weighted average of the thus calculated monthly national average prices, using monthly national shipment quantities of 2009 and 2010 as its weight. b Materials for agricultural production. Firstly, each of the monthly national average prices of 2010 is calculated by the simple average of the monthly prefectural average prices. Secondly, each of the yearly (annual) national average prices is calculated by the simple average of the calculated monthly national average prices. (2) Formula of indices Laspeyres' formula is used Ｉ ｔ ＝ Index number of prices for all items and groups Σ Ｗ o i ( 100×Ｐ t i / Ｐ o i ) Ｗ o i＝ Weight by commodity (product / material) in the base period Ｉｔ＝ (2010 calendar year) Σ Ｗ oi Ｐ o i＝ Individual price in the base period (2010 calendar year) Ｐ t i＝ Individual price in the current period (3) Weights and item numbers are shown in the table of weights and item numbers of Index Numbers of Commodity Prices in Agricultureare. The calculation of index numbers for all items and groups of agricultural products had been used "Steady combined weight method by item and by month", but since 2000 base, it has been used "Variable weight by item by month" in which weight for each group is fixed and monthly weights of items are changed in line with specific volume in the market, in order to properly reflect monthly price fluctuation. 2 Prices by commodity (product / material) and indices of each year Prices by commodity (product / material) are calculated by each of the yearly national average prices and indices in the same formula, as for the base year price (as described in 1 above). 330 330 農業物価指数のウエイト及び品目数表 Weights and item numbers of Index Numbers of Commodity Prices in Agriculture Group of items ウエイト Weights 品 目 数 Number of items 農 産 物 米 麦 雑 穀 豆 い も 野 菜 果 実 工 芸 農 作 物 花 き 畜 産 物 稲 わ ら Agricultural products Rice Wheat and barley Miscellaneous cereals Pulses Potatoes and sweet potatoes Vegetables Fruits Industrial crops Flowers Livestock products Rice straw 10,000 2,247 90 11 90 259 2,700 1,256 392 501 2,449 5 120 4 4 1 3 5 37 22 8 17 18 1 農業生産資材 種 苗 及 び 苗 木 畜 産 用 動 物 肥 料 飼 料 農 業 薬 剤 諸 材 料 光 熱 動 力 農 機 具 自動車・同関係料金 建 築 資 材 農 用 被 服 賃借料及び料金 Materials for agricultural production Seeds and seedlings Livestock Fertilizers Feed Agricultural chemicals Miscellaneous materials Light, heat and power Agricultural implements Automobiles and charges Materials for building Agricultural clothing Rent and charges 10,000 525 440 1,070 1,701 887 378 928 2,072 578 392 32 997 141 17 11 16 13 20 9 7 21 4 9 5 9 種 別

© Copyright 2020 ExpyDoc