Though we cannot jump to a conclusion as such, a lot needs to added to the study. These may be the patterns that showed up in a case study.
However, I too have bee studying the same and feel not necessarily the same always. However, it depended on the up bringing and the responsibilities shouldered. I found that whoever be it, eldest or the youngest, if he/she mantled family responsibilities, they showed more matured and have been well mannered.
