如果人们少报它们的开销，而在食品花费上表现诚实的话，他们的恩格尔系数则会虚高。

If people underreported their overall spending, but told the truth about their food spending, their Engel's coefficients will be artificially high.

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。

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.

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)。

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).