It can skew results, because poor (by income) people can own some wealth in land, because they don't want to sell it for legal or sentimental reasons. My own gr

It can skew results, because poor (by income) people can own some wealth in land, because they don't want to sell it for legal or sentimental reasons. My own grandmother keeps some wasteland, because she believes that someday her children (medical professionals) will farm it.