This study addresses why small parties nominate candidates to run in the district elections and how nomination of district candidates could influence small parties’ share of party votes in Taiwan. Previous studies on party's strategic entry in the mixed electoral system demonstrate the existence of ‘contamination effect’ in various Western democracies. While ‘contamination effect’ suggests that party would gain more proportional representation (PR) seats by increasing its number of candidate nomination in the single-member-district (SMD) races, we contend that small parties should also take the strength of nominated candidates into consideration. Nominating strong candidates in SMD competitions could generate positive ‘spillover effect’ to party's PR tier. By focusing on the 2016 Taiwan legislative election, our findings suggest that first, small parties need to fulfill the institutional requirements in order to qualify for running in the party-list election; second, the ‘contamination effect’ exists in Taiwan, but it is conditional; and finally, candidates’ strength creates positive ‘spillover effect’ on party's proportional seats.

Research on the impact of gender quotas in open-list proportional representation systems has described quotas as ineffective or even paradoxical. While some authors argue that gender quotas without a placement mandate will be essentially ineffective since most women will be nominated to unpromising positions, others suppose that women will be disadvantaged by gender quotas because the increase in the number of female candidates will decrease the average number of preferential votes cast for women. We reexamine the evidence for these claims by analyzing the case of Poland. We demonstrate that the gender quota introduced there in 2011 increased the number of women placed at promising ballot positions and had very little impact on the number of preferential votes cast for women. Additionally, using simulations, we show that the quota had a positive impact on the number of elected women.