440 to 536 bridge table
Dear Moderator:
I noticed that IMPLAN Sector ( old 440 scheme) industry sector 103 (All other miscellaneous wood product manufacturing) and industry sector 300 (office furniture manufacturing) are bridged with sector 145 (All other miscellaneous wood product manufacturing) in recently released 536 scheme. Interesting, bridge table (the downloaded excel file: implan440to536) provides ratio of 1 which does not make sense to me. Won't the ratio be different than 1 if two previous sectors (103 and 300 in old scheme) are merged into single sector (sector 145 in new scheme) now? It would be great if you could please confirm and explain this case?

Thank you for your question. As we looked into the matter, it appears that the bridge contains an error. While, in principle, >1 440sector can have a ratio of 1 moving into the 536 bridge, these particular sectors had been bridged incorrectly. We have posted updated bridging ratios for Implan 440 sector 300 (and 301) below. Implan 440 sector 103 still bridges 100% to 536sector 145. We will be posting updated 440to536 and 536to440 bridges on the website shortly. Implan440Index Implan440Code Ratio Implan536Index Implan536Code 300 33721A 0.388150057 373 337211 301 337212 1 374 337212 300 33721A 0.611849943 375 337214 Again, thank you for pointing this out to us. It is important to know that in principle, >1 440sector could have a ratio of 1 moving into the same 536 sector. In the 440 to 536 bridge, a ratio of 1 means that 100% of the 440 sector should be classified as the corresponding 536 sector. In theory, there could be any number of sectors with a ratio of 1 merged into a single sector. So, the ratio of 1 for two different 440based sectors simply means that both fit entirely into the same 536based sector. In general, this happens rarely since we disaggregated more sectors than we aggregated. Note that the ratios only work one way: the 440 to 536 bridge is useful for converting 440based sectors to 536based sectors, but is not useful for converting 536based sectors to 440based sectors. 
Hi Omkar, Here is the link to the 440536 bridge: http://implan.com/index.php?view=document&alias=268implan440toimplan536&category_slug=implanbridgetables&layout=default&option=com_docman&Itemid=1480 Thank you!
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