We study the relationship between parties’ candidate selection processes andlegislative productivity. Utilizing the legislation data of the 17th NationalAssembly for which some of candidates were selected by the bottom-upselection process, we try to shed some light on how candidate selectionmethods affect what bills to propose, other party member’s countersignature,and the possibility that a bill passes on the floor. Furthermore, we examinehow a legislator’s performance, especially the number of proposed bills andpassed bills influences his/her chance of reelection. Anchored on our empiricalanalysis, we argue that it is desirable to adopt bottom-up candidate selectionin all the levels of elections, hold National Assembly election and localelections in the same year, and revise campaign finance-related acts toenhance the legislative productivity.