Without saying "I bought the exact same brand and type of egg" for 25 years, the data is probably pretty noisy and may reflect the author's income changes as well as the price of eggs.
The more recent eggs being from Whole Foods definitely points toward this. I'm in a different part of the country but eggs are currently ~15¢/egg at grocery stores around here.
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Or a third option: eggs are just a terrible proxy for CPI
Without saying "I bought the exact same brand and type of egg" for 25 years, the data is probably pretty noisy and may reflect the author's income changes as well as the price of eggs.
The more recent eggs being from Whole Foods definitely points toward this. I'm in a different part of the country but eggs are currently ~15¢/egg at grocery stores around here.