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Estimating the Number of Seats in Local Constituencies of a Party Using Exit Polls in the General Election

총선 출구조사에서 정당별 지역구 의석수 추정

  • Kim, Ji-Hyun (Department of Statistics and Actuarial Science, Soongsil University)
  • 김지현 (숭실대학교 정보통계보험수리학과)
  • Received : 2012.11.12
  • Accepted : 2012.12.13
  • Published : 2013.02.28

Abstract

Exit polls failed to estimate the number of seats in the National Assembly for each party in the 2012 General Election, even though they estimated it in interval. Three major broadcast companies jointly carried out exit polls, but made projections independently. The exact methods of projection were not publicly released. This paper proposes confidence intervals for the number of seats in local constituencies using the results of exit polls, and conducted simulation studies to assess the performance of the cofidence intervals. The proposed confidence intervals were applied to the real data of 2012 General Election.

2012년 4월 11일 총선 당일 이루어진 출구조사에서 정당별 의석수를 구간으로 예측했음에도 불구하고 예측이 빗나갔다. 지상파 3사가 출구조사는 공동으로 실시하였지만 정당별 의석수 예측은 각자 하였다고 하는데 구체적 예측 방법은 공개하지 않았다. 이 논문에서 정당별 지역구 의석수를 구간으로 추정하는 방법을 제안하고 그 성능을 모의실험을 통해 알아보았다. 그리고 제19대 총선 출구조사의 실제자료에 적용해 보았다.

Keywords

References

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