Pedro Arantes
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Proxy Variable

A proxy variable is a measurable variable that isn't directly relevant but is used in place of another unobservable or immeasurable variable.
#proxy
Zettelkasten, June 23, 2021
## Notes - A proxy variable is a measurable variable that isn't directly relevant but is used in place of another unobservable or immeasurable variable. - Proxy variables interact with other proxy variables. - It's dangerous focusing only on one proxy variable. - To work with multiple proxy variables, you must express them in the same unit of measure. - A good proxy variable must have a closer correlation with the variable of interest. - Examples: - Proxy variable per-capita GDP measures standard of living or quality of life. - Changes in height over a fixed time are a proxy for hormone levels in the blood. - [Slack](/zettel/slack-and-efficiency) can be used to represent an economic impact on a project. ## Questions - What are other types of proxy variables? ## References - [Wikipedia. Proxy (statistics)](<https://en.wikipedia.org/wiki/Proxy_(statistics)>)
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