Journal of Economic
Curses Pr
1000-9825/2002/13(1
Temporal
Engel coefficientEngel coefficent=totalcostoffood /family'stotalcostOrigin : namedafter Ernst Engel, an economist in EnglandTime : inthe 19th centuryTendency:Engel coefficent:largeCountry or family :p
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Journal of Economi
Polynomial paramet
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Us
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