が有る

to have; to possess (a quality, feature, or attribute)

→ が
phrase Extremely common #26
to have; to possess (a quality, feature, or attribute) Used to say that someone or something has a characteristic, ability, possession, or accompanying feature. In everyday writing, this is often written がある.
JA: 彼は学生に人気が有る。
EN: He is popular with students.

どうして彼は自分のほうが僕より分別が有ると思うんだろう。

Why does he think he’s more sensible than I am?

彼は学生に人気が有る。

He is popular with students.