Give less reputation on answers when question is marked as duplicate
12566
Give an incentive for finding duplicate questions
127498
What to do about Copy Cat answers?
28082
Why do you lose reputation for downvoting answers?
87274
Should I downvote a duplicate question?
3005
Giving edit reputation bonus for same user for same post multiple times
150539
Sorting by questions that have no answers by votes shows duplicates
34339
Lower the amount of reputation needed to comment
36484
Handling answers that build heavily on (or are copied outright from) existing answers
56691
Disallow closing of questions with a certain number of question / answer upvotes
10293
How should duplicate questions be handled?
147115
Disallow downvoting other answers if I've posted my own
130860
What to do when your question has an old, stale, unanswered duplicate?
16251
I accidentally marked the wrong question as a duplicate. How can I replace it with the correct duplicate?
76517
Split reputation: one for questions and one for answers
70074
How to handle a deliberate duplicate question
242
Accepting your own answer with alternative answers to be worth +2 reputation?
148956
Is there any value to NOT deleting my own duplicate question?