Truth #1: Combining money produces happier couples.
Every one of the six studies demonstrated that couples were far happier in their relationship if they combined everything rather than separating everything. And in five of the six studies, the same was true even when comparing couples with “partly combined/partly separate” finances. (The only exception came via data from Japan, where the researchers expected a less-dramatic impact from pooling finances in what was already a collectivist culture.)
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