# Does a proper prior lead always a proper posterior?

Does a proper prior lead always a proper posterior?

I cannot check whether the posterior is proper, so I was wondering if this assumption is always satisfied .

• Related: stats.stackexchange.com/questions/87321 And Tom Minka's answer there is an answer to this question. – Juho Kokkala Sep 22 '15 at 9:12
• Thanks for your help, but Tom Minka said that if data is continuos even if the prior is proper, the posterior may be improper. What if data is discrete? – sciury Sep 22 '15 at 10:20