There are times when several questions seem like they really ask the same question. Yet, sometimes the questions are old and both have their own answers. Is there a technique to merge questions, and what happens to points?
All of the answers that get merged over retain their scores, and, I strongly presume, their effects on their authors' reputation scores.
The closed question, I'm fairly certain, does not accrue additional reputation for its author based on future votes on the retained question. I'm not sure if the merger erases the effect of all previous votes on the closed question, treating it as deleted.