Generic private-label brands can cost \(25 \%\) to \(30 \%\) less than nationally recognized name brands. Data show that people buy more private-label products during times of economic weakness. In Europe, for example, it is estimated that the market share of private-label products has increased over the past few years to about \(30 \%\) in Hungary, Poland, Slovakia, and the Czech Republic and over 50\% in Switzerland and Spain. If lower-income consumers also tend to prefer private-label products, what can you conclude about the Engel curve for private-label goods?