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Price index
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=== Relative ease of calculating the Laspeyres index === The Laspeyres index is simpler to compute than Paasche or bilateral indices because it fixes quantities at <math>t_0</math>, requiring only price updates (e.g., monthly price surveys) without new quantity or expenditure data each period. Paasche needs current quantities, and superlatives like Fisher demand both, increasing data and computational demands.<ref>Statistics New Zealand; ''Glossary of Common Terms'', [http://www2.stats.govt.nz/domino/external/omni/omni.nsf/wwwglsry/paasche+index "Paasche Index"] {{Webarchive|url=https://web.archive.org/web/20170518063121/http://www2.stats.govt.nz/domino/external/omni/omni.nsf/wwwglsry/paasche+index|date=2017-05-18}}</ref>
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