Or if a household does underreport its spending, he assumes that it also downplays its food expenses proportionately, so that their Engel’s coefficient is unaffected.
或者如果一个家庭少报了开支，他假设同一家庭同时也相应少报食物开支，这样恩格尔系数才不受影响。
In Mr Wang's survey, for example, the poorest people devoted 48% of their outlays to food, whereas the richest spent only 29% (an Engel's coefficient of 0.29).
比如在王晓鲁的调查中，最贫穷的人将收入中48%花费在食物上，而最富裕的仅为29%(恩格尔系数是0.29)。
Peng's Coefficient is inversely proportional to Engel's Coeffient, because the more proportion people spend on food, the less proportion on culture and spirit.
彭氏系数通常跟恩格尔系数成反比，因为人们在食物上的支出比重越大，在精神文化上的消费往往会减少。
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