Engel's Law: Revision history

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9 January 2014

  • curprev 16:3916:39, 9 January 2014‎ Sfg02 talk contribs‎ 300 bytes +300‎ Created page with "{{Learning concept |Description=Differences noted over a century ago by Ernst Engel in how people shift their spending across food, housing, transportation, health care, and o..."
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