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Household size began inching up in 2005, before the recession, a trend that might have been driven by the real estate boom that made housing unaffordable to many. Now, it’s more likely to be caused by the poor economy.
Increase in household size could slow economic recovery - USATODAY.com
Note, as Scott Sumner points out, the reversed causation between headline and article copy.
Like I’ve said before, there’s nothing tacky about a McMansion once it’s holding three generations and some livestock.
